Answer:
f(x) = x² +2
Step-by-step explanation:
x-values are evenly spaced, and y-values decrease to a minimum of 2, then increase again. First differences are -1, 1, 3, 5, and second differences are constant at 2. This means that a 2nd degree polynomial can be used for the rule.
The minimum of f(x) occurs at x=0, so there is no horizontal shift of the vertex of the quadratic function. f(1) -f(0) = 1, so the vertical scale factor for the quadratic is 1.
The quadratic with a vertex of (0, 2) and a vertical scale factor of 1 is ...
f(x) = 1·(x -0)² +2
f(x) = x² +2 . . . . . . simplified
_____
Comment on differences
"First differences" are the differences between successive "y" values when the "x" values are evenly spaced. Here, they are 2-3 = -1, 3-2 = 1, 6-3 = 3, 11-6 = 5. These are not constant, so the function is not a linear function.
"Second differences" are the differences between successive first differences. Here, they are 1-(-1) = 2, 3-1 = 2, 5-3 = 2. These are constant, so the function is a quadratic (2nd-degree). When n-th differences are constant, the sequence can be modeled by a polynomial of degree n.
__
Comment on determining the rule
Once you know the rule is 2nd-degree, there are a number of ways you can find out what it is. One way is to write it as ...
f(x) = ax^2 + bx + c
and fill in three different values for x and f(x). This will give you three linear equations in a, b, and c, which can be solved by any of the usual means for solving systems of linear equations.
Fortunately, this set of data includes the vertex of the function, making it easy to start with the vertex form:
f(x) = a(x -h)^2 +k
where (h, k) is the vertex (minimum, in this case), and "a" is the vertical scale factor. The value of "a" is easily determined as being the difference between f(h+1) and f(h). Here, h=0, so that is f(1) -f(0) = 3-2 = 1.
Answer:
x² +2
Step-by-step explanation:
What is a division expression for Two bottles of juice are divided equally among six people.
2 bottles divided by 6 people = 2/6 which equals 1/3.
A person is choosing between two cellphones.Data Plan A has a monthly free of $35 with a charge of $12 per gigabyte(GB).Data Plan B has a monthly fee of $25 with a charge of $17 per GB.
a) for how many GB of data will the costs for the two data plans be the same?what is the cost for each plan?
Answer:
When you use 2 GB
Step-by-step explanation:
Data Plan a Formula 35(12p)
P = per GB
Data Plan B 25(17p)
Set each on equal to each other
Please Check my work, but I think this is on the right track.
The costs for both the data plans A and B will be the same for 2GB of data. The cost for each plan will be $59.
Explanation:This problem is essentially asking us to find the number of gigabytes (GB) at which both data plans A and B cost the same. We can form two equations representing the costs of the plans. For plan A, the cost is $35 + $12 per GB. For plan B, the cost is $25 + $17 per GB. We can express these costs mathematically as: 35+12x=25+17x (where 'x' is the number of gigabytes). By solving this equation for 'x', we subtract 25 from both sides and also subtract 12x from both sides, which gives us 10 = 5x. Dividing by 5 from both sides give us x = 2 GB. So, for 2GB of data, the costs for both the data plans will be the same and the cost for each plan is $35 + 12(2) = $59 for plan A and $25 + 17(2) = $59 for plan B.
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What could you do to solve the problem below?
When Sabine set off to climb Mt. Marcy, she had 18 gummi bears in her bag.
When she returned to the lodge, she had 6 gummi bears left. How many
gummi bears did she eat during her hike?
A. Subtract 6 from 18
B. Multiply 18 by 6
C. Divide 18 by 6
D. Add 6 to 18
Answer: A. Subtract 6 from 18
9.42 multiplied by 6.83
The product of 9.42 and 6.83 is found by direct multiplication, which is not listed in the reference provided. The correct answer, using standard multiplication, is approximately 64.355 when rounded to three decimal places.
To calculate the product of 9.42 multiplied by 6.83, we use the multiplication method that is taught in mathematics. Multiplying these two numbers together is a straightforward process:
9.42 × 6.83
This calculation is something we can easily undertake with a calculator or by using the long multiplication technique. Neither of the reference information provided lists this specific product, so to ensure accuracy, we would perform the calculation directly. The correct solution is not provided in the data set above.
The answer to 9.42 multiplied by 6.83 is approximately 64.355 when rounded to three decimal places.
help me please so confsed
The answers is 2,200
Answer:
2600
Step-by-step explanation:
first you would round them to the nearest hundred. this means that if the figure in the tens column is greater than or equal to 5 you would round up. if it is less than 5 you round down
so 1400+400+800=
then you would add them up
so 1400+400+800=2600
1400+400=1800
1800+800=2600
A police cruiser is traveling at 20.0 m/s when the officer spies a speeder. The cruiser accelerates at 3.0 m/s^2 for 5.0 seconds, at which time the speeder pulls over and starts thinking up excuses to try and get out of a ticket. The cruiser then slows to a stop at 5.0 m/s^2. How far does it go in the entire time?
The police cruiser travels a total distance of 275.0 meters. It covers 137.5 meters during acceleration and the same distance during deceleration (in the opposite direction), summing up to 275.0 meters in total.
Calculating the distance covered during acceleration:
The equation for distance covered with constant acceleration is given by:
[tex]\[ s = ut + \frac{1}{2}at^2 \][/tex]
Where:
[tex]\( u \)[/tex] = Initial velocity
[tex]\( a \)[/tex] = Acceleration
[tex]\( t \)[/tex] = Time
Given:
Initial velocity [tex](\( u \))[/tex] = 20.0 m/s
Acceleration[tex](\( a \))[/tex] = 3.0 m/s²
Time[tex](\( t \))[/tex]= 5.0 seconds
Let's find the distance covered during acceleration using the above formula:
[tex]\[ s = ut + \frac{1}{2}at^2 \][/tex]
[tex]\[ s = (20.0 \, \text{m/s} \times 5.0 \, \text{s}) + \frac{1}{2} \times 3.0 \, \text{m/s}^2 \times (5.0 \, \text{s})^2 \][/tex]
[tex]\[ s = (100.0 \, \text{m}) + \frac{1}{2} \times 3.0 \, \text{m/s}^2 \times 25.0 \, \text{s}^2 \][/tex]
[tex]\[ s = 100.0 \, \text{m} + 37.5 \, \text{m} \][/tex]
[tex]\[ s = 137.5 \, \text{m} \][/tex]
Therefore, the distance covered during acceleration is 137.5 meters.
Calculating the distance covered during deceleration (slowing to a stop):
The cruiser starts at a speed of 20.0 m/s and decelerates uniformly until it comes to a stop. The distance covered during deceleration will be the same as the distance covered during acceleration but in the opposite direction.
So, the distance covered during deceleration = 137.5 meters (in the opposite direction).
Total distance traveled:
The total distance traveled by the cruiser during acceleration and then deceleration is the sum of these distances (taking the magnitudes):
Total distance = Distance during acceleration + Distance during deceleration
Total distance = 137.5 m + 137.5 m
Total distance = 275.0 meters
Therefore, the entire distance covered by the cruiser in the entire time is 275.0 meters.
Evelyn says that the equation 3(x - 3) + 5 = 3x + 1 + 4
has infinitely many solutions because the variable terms
on each side are the same. Do you agree with Evelyn?
Explain why or why not.
When x dissapears we have a false equation:
-4 = 5, so the equation does not have solutions, which means that Evelyn is incorrect.
The equation has infinite solutions?
Let's simplify the equation:
3(x - 3) + 5 = 3x + 1 + 4
distributing the left side.
3x - 9 + 5 = 3x + 1 + 4
3x - 4 = 3x + 5
If you subtract 3x in both we will get:
3x - 4 - 3x = 3x + 5 - 3x
-4 = 5
This is false, and x disappeared, so there is no value of x that makes this equation true, meaning that the equation does not have a solution.
5x+17+9x+23=180 solve for x
Answer:
x=10
Step-by-step explanation:
First combine like terms:
14x + 40 = 180
Second subtract 40 from both sides:
14x = 140
Third divide both sides by 14:
x = 10
Find each product.
(2x+4)(2x-4)
The answer to your question is 4x^2 - 16
Hope this helped
Answer:
Step-by-step explanation: (2x + 4) x (2x - 4)
2x + 4 = 6x
2x - 4 = 4 - 2x = 2x
6x X 2x = 12x
What is the answer? If 45 x 36 +62=72%
Please help 10 points
Step-by-step explanation:
We know that
[tex]tan\theta =\frac{altitude}{base}[/tex]
Using this for the triangles
For the small triangle
[tex]tan \theta =\frac{6\frac{1}{2} }{9}[/tex]
[tex]\Leftrightarrow tan \theta =\frac{\frac{13}{2} }{9}[/tex]
[tex]\Leftrightarrow tan \theta =\frac{13} {18}[/tex]
Again for the bigger triangle
[tex]tan \theta =\frac{h}{31\frac{1}{2} }[/tex]
[tex]\Leftrightarrow tan \theta =\frac{h}{\frac{63}{2} }[/tex]
[tex]\Leftrightarrow tan \theta =\frac{2h}{63}[/tex]
Therefore
[tex]\frac{2h}{63} =\frac{13}{18}[/tex]
[tex]\Leftrightarrow h=\frac{13 \times 63}{18 \times 2}[/tex]
[tex]\Leftrightarrow h=\frac{819}{36}[/tex]
[tex]\Leftrightarrow h = 22.75[/tex] ft
Therefore h = 22.75 ft
Determine the x and y Intercepts for the graph defined by the given equation
y=x+8
a. X-interoept is (0,8)
0. x Interceptis (-3,0)
-interoept is (-8,0)
y-interoept is 0.8)
b. x-interoept is (0-8)
d. x-interoept is (8,0)
y-intercept is (8,0)
y-interoept is (0-8)
Please select the best answer from the choices provided
Answer:
x- intercept (- 8, 0), y- intercept (0, 8)
Step-by-step explanation:
To find the y- intercept, let x = 0 in the equation and solve for y
y = 0 + 8 = 8 ⇒ (0, 8 ) ← y- intercept
To find the x- intercept, let y = 0 in the equation and solve for x
x + 8 = 0 ( subtract 8 from both sides )
x = - 8 ⇒ (- 8, 0 ) ← x- intercept
X-intercept is (-8,0) and y-intercept is (0,8). the correct option is A.
What is y-intercept of a function?
The intersection of the graph of the function with the y-axis gives y-intercept of that function. The y-intercept is the value of y on the y-axis at which the considered function intersects it.
Assume that we've got: y = f(x)
At y-axis, we've got x = 0, so putting it will give us the y-intercept.
Thus, y-intercept of y = f(x) is y = f(0)
We are given that;
Function y=x+8
Now,
The equation of the graph is y = x + 8. To find the x-intercept, we set y = 0 and solve for x.
0 = x + 8
x = -8
Therefore, the x-intercept is (-8, 0).
To find the y-intercept, we set x = 0 and solve for y.
y = 0 + 8
y = 8
Therefore, X-intercept will be (-8,0) and y-intercept will be (0,8).
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The chipmunks dropped an acorn from the top of a tree. The acorn was 0.25 kg and had a velocity of 4 m/s when it hit the ground. How much kinetic energy did it have?
Step-by-step explanation:
Given, the chipmunks dropped an acron from the top of a tree. The acron was 0.25 kg and had a velocity of 4 m/s when it hit ground.
Kinetic energy =[tex]\frac{1}{2} m v^2[/tex]
Here m = 0.25 kg and v =4 m/s
Kinetic energy of the acron had =[tex]\frac{1}{2}\times 0.25 \times 4^2[/tex] J
= 2 J
The kinetic energy of the Chipmunk is 2 Joules.
Kinetic energy is the energy than an object possesses due to its motion. It is given by:
Kinetic Energy(KE) = (1/2)mv²
Where m is mass, v is velocity.
Given that m = 0.25 kg, v = 4 m/s, hence:
KE = (1/2)mv²
KE = (1/2) * 0.25 * 4² = 2J
The kinetic energy of the Chipmunk is 2 Joules.
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If $1,000 is invested at 16% interest, compounded continuously, for five years,
what is the ending balance?
-
$1,225,54
$2,225.54
$225.54
$22,255.40
Answer:
$2,225.54
Step-by-step explanation:
Principal, p = $1000
interest rate r = 16% 0r 0.16
years of deposit, t = 5
Finding ending balance below
Since interest compounded continuously,
Substitute the following values
p = $1000, e = exponent, r = 0.16 and t = 5
B = 1000e^((0.16)(5))
=1000e^(0.8)
=1000 X 2.2255409284924676
=2,225.5409284924676
Which B is approximately $2,225.54
Ending balance =$2,225.54
Assuming the amount of $1,000 was invested at an interest rate of 16%, compounded continuously, for a period of five years, what the ending balance will be is: $2,225.54
p represent Principal = $1000
r represent Interest rate= 16% or 0.16
t represent=5 years
Now let determine the ending balance
Ending balance= $1000e^(0.16)(5)
Ending balance=$1000e^(0.8)
Ending balance=$1000 X 2.2255409284924
Ending balance=$2,225.5409284924
Ending balance=$2,225.54 (Approximately)
Inconclusion if the amount of $1,000 was invested at an interest rate of 16%, compounded continuously, for a period of five years, what the ending balance will be is: $2,225.54
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find the difference 49,002 -5,398
43,604
Subtract 5398 from 49002
Answer:
Step-by-step explanation:
49,002 is greater than -5,398
Find the value of this expression if x = 8.
x2 + 8/
X – 5
Enter the correct answer.
I assume you mean (x^2+8)/(x-5)?
If so, we have:
(8^2+8)/(8-5)
(64+8)/3
72/3
24
So the value is 24 when x=8
Hope this helped!
The height of a rectangular prism is 3 in.. The perimeter is 88 in. (4 in. wide and 11 in. long). What is the value of the base?
Step-by-step explanation:
Given,
The height of a rectangular prism(h) = 3 in and
The perimeter of a rectangular prism = 88 in
To find, the base of a rectangular prism(b) = ?
We know that,
The perimeter of a rectangular prism = 2l + 2b or 2b + 2h or 2h + 2l
∴ 2b + 2(3) = 88
⇒ 2b = 88 - 6
⇒ 2b = 82
⇒ b = 41 in
Thus, the base of a rectangular prism(b) = 41 in.
Amelia’s hourly wage is $3.50 less than double David’s hourly wage. Write an equation to find David’s hourly wage
The equation to find David’s hourly wage is:
David’s hourly wage = [tex]\frac{1}{2}[/tex] x + 1.75, where x represents Amelia’s hourly wage
Step-by-step explanation:
The given is:
Amelia’s hourly wage is $3.50 less than double David’s hourly wage
We need to find an equation to find David’s hourly wage
Assume that:
Amelia's hourly wage is xDavid’s hourly wage is y∵ Amelia’s hourly wage is $3.50 less than double David’s
hourly wage
- That means multiply David’s hourly wage by 2, then
subtract 3.50 from the product to get Amelia’s hourly wage
∴ x = 2y - 3.50
Now let us find y in terms of x
∵ x = 2y - 3.50
- Add 3.5 to both sides
∴ x + 3.50 = 2y
- Divide each term by 2
∴ [tex]\frac{1}{2}[/tex] x + 1.75 = y
- Switch the two sides
∴ y = [tex]\frac{1}{2}[/tex] x + 1.75
∵ y represents David’s hourly wage
∴ David’s hourly wage = [tex]\frac{1}{2}[/tex] x + 1.75, where x represents
Amelia’s hourly wage
The equation to find David’s hourly wage is:
David’s hourly wage = [tex]\frac{1}{2}[/tex] x + 1.75, where x represents Amelia’s hourly wage
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9(6u+5)+2(u-4) need solved
Answer:
Step-by-step explanation:
Subtract
6 u from 2 u .
− 4 u + 9 = 19
Move all terms not containing u to the right side of the equation.
− 4 u = 10
Divide each term by − 4 and simplify.
u = − [tex]\frac{5}{2}[/tex]
The result can be shown in multiple forms.
Exact Form:
u = − [tex]\frac{5}{2}[/tex]
Decimal Form:
u =− 2.5
Mixed Number Form:
u = − 2 [tex]\frac{1}{2}[/tex]
Vince has a rectangular rug in his room with an area of 10 ft the length of the rug is 18 inches longer than the width what could be the dimensions of the rug?
The length of the rug is 4 ft.
The width of the rug is 2.5 ft.
Explanation:
The area of the rug is 10 ft.
The length of the rug be l.
Let us convert the inches to feet.
Thus, [tex]18 inches = 1.5 ft[/tex]
Thus, the length of the rug is [tex]l=1.5+w[/tex]
Let the width of the rug be w.
Substituting these values in the formula of area of the rectangle, we get,
[tex]A=length\times width[/tex]
[tex]10=(1.5+w)(w)\\10=1.5w+w^2\\w^2+1.5w-10=0[/tex]
Solving the expression using the quadratic formula,
[tex]$w=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$[/tex]
Substituting the values, we have,
[tex]$w=\frac{-15 \pm \sqrt{15^{2}-4 \cdot 10(-100)}}{2 \cdot 10}\\[/tex]
[tex]$w=\frac{-15 \pm \sqrt{4225}}{20}$[/tex]
[tex]$w=\frac{-15 \pm 65}{2 0}$[/tex]
Thus,
[tex]w=\frac{-15 + 65}{2 0}\\w=\frac{50}{20} \\w=2.5[/tex] and [tex]w=\frac{-15 - 65}{2 0}\\w=\frac{-80}{20} \\w=-4[/tex]
Since, the value of w cannot be negative, the value of w is 2.5ft
Thus, the width of the rug is 2.5ft
Substituting [tex]w=2.5[/tex] in [tex]l=1.5+w[/tex], we get,
[tex]l=1.5+2.5\\l=4[/tex]
Thus, the length of the rug is 4 ft.
It's A
length 4 and width 2.5
solve if 2/3 + 1/3x = 2x
Answer:
x = [tex]\frac{2}{5}[/tex]
Step-by-step explanation:
Given
[tex]\frac{2}{3}[/tex] + [tex]\frac{1}{3}[/tex] x = 2x
Multiply through by 3 to clear the fractions
2 + x = 6x ( subtract x from both sides )
2 = 5x ( divide both sides by 5 )
[tex]\frac{2}{5}[/tex] = x
Answer: x=2/5
Step-by-step explanation:
Trust me
what is the answer to
3/8 +-4/5+-3/8+5/4
Answer:
0.45
Step-by-step explanation:
No explanation calculators rule
Jerome uses the formula, P = 2DB, to find approximate six month premium when his driver risk factor, d, is 1.02 and the basic six month premium is $500.
A. $170.00
B. $270.60
C. $300.50
D. $332.00
Answer:
A- 170$
Step-by-step explanation:
The approximate six month premium is $170.
What is a linear equation?A linear equation is an equation in which there is one variable that is raised to the power of 1. An example is x + 2
What is the one month premium?In order to determine the six month premium, substitute for d and b in the given equation:
P = 2 x 1.02 x $500 = $1020
Monthly premium = $1020 / 6 = $170
Here is the complete question:
Jerome uses the formula, P = 2DB, to find his approximate six-month premium when his driver risk factor, D, is 1.02 and the basic six-month premium is $500.What will his monthly premium be?
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Jose has $45 to spend at the mall. He buys a toy for $18.63, two candy bars at $0.47 EACH, and a shirt for $12.64 (All prices include taxes). How much money will he have left after he pays for his purchases? HELP ASAP
Answer:
$12.79
Step-by-step explanation:
$45 - $18.63 = $26.37
$26.37 - ($.47 x 2) = $26.37 - $.94 = $25.43
$25.43 - $12.64 = $12.79
Y-4=-1/2(x+7)
Graph the line
Answer:
Step-by-step explanation:
Which best describes the complement of spinning any number less than 3?
A spinner is split into 4 equal parts labeled 1, 2, 3, and 4.
spinning a 4
spinning a 3 or 4
spinning a 1 or 2
spinning a 1, 2, or 3
Answer:
b) Complement of spinning any number less than 3 is Spinning 3 or 4.
Step-by-step explanation:
COMPLIMENT of any Set A is the set of all the elements which are in the sample space but NOT IN SET A.
Here, Event E = Spinning a spinner with 4 parts and getting a number less than 3.
Here, Sample Space = {1,2,3,4}
Also, as outcomes is LESS THAN 3, ⇒ E = {1 ,2}
Now, Compliment E = Sample Space - { Elements in set E}
= {1,2,3,4} - {1 ,2}
or, E' = { 3,4}
Hence, complement of spinning any number less than 3 is Spinning 3 or 4.
Answer:
Spinning a 3 or 4
Step-by-step explanation:
The numbers that are less than 3 on the spinner, are 1 and 2. Therefore, the complement or opposite of that are all the numbers other than 1 and 2. So the answer is 3 and 4.
The Murphy family is on a road trip. On the first day, they traveled 30% of their total distance. On the second day, they traveled another 1/4 of the total distance. What fraction of the total distance do they have left after the second day? What percent?
After the second day of their road trip, the Murphy family has
9/20 or 45% of the total distance left to travel.
To solve this problem, let's denote the total distance of the trip as $D$.
On the first day, the Murphy family travelled 30% of the total distance, which can be written as:
[tex]\[ 0.30 \times D = \frac{30}{100} \times D = \frac{3}{10} \times D \][/tex]
On the second day, they travelled another 1/4 of the total distance, which is: [tex]\[ \frac{1}{4} \times D \][/tex]
The total distance travelled after two days is the sum of the distances travelled on the first and second days: [tex]\[ \frac{3}{10} \times D + \frac{1}{4} \times D \][/tex]
To add these fractions, we find a common denominator, which is 20:
[tex]\ total \ distance \ travelled =6/20D+5/20D[/tex]
[tex]\ total \ distance \ travelled =11/20D[/tex]
The remaining distance after the second day is:
Distance left=D−Total distance travelled
[tex]Distance \ left=D-11/20D[/tex]
[tex]Distance \ left=20/20 D-11/20D[/tex]
[tex]Distance \ left=9/20D[/tex]
Express the fraction and percentage of the distance left:
Fraction of the total distance left:
Fraction= Distance left/D
[tex]Fraction=9/20D/D=9/20[/tex]
After the second day, the Murphy family has 9/20 of the total distance left.
Percentage of the total distance left:
Percentage= Distance left/D×100%
[tex]Percentage= 9/20D/D*100%[/tex]
[tex]Percentage=9/20*100%[/tex]
[tex]Percentage=45[/tex]
Therefore, after the second day of their road trip, the Murphy family has
9/20 or 45% of the total distance left to travel.
Will Has $2.25 in nickels and dimes . If there are twice as many dimes and nickels how many nickels and dimes does will have
Answer:
18 dimes and 9 nickels
Step-by-step explanation:
I assume you mean twice as many dimes "then" nickels which would make it 18 dimes = 1.80$ 9 nickels=0.45$
What is the approximate circumference of this circle? (Use π = 3.14) circle with radius 19 centimeters
A.) 29.83 cm
B.) 119.32 cm
C.) 59.66 cm
D.) 6.05 cm
Answer:
B. 119.32
Step-by-step explanation:
Use C = πd as the formula, which is 3.14x38=119.32
Answer:
B) [tex]119.32[/tex] [tex]cm[/tex]
Step-by-step explanation:
Circumference of a circle is the total length of its boundaries that it makes to complete 360°
Circumference of a circle = [tex]2\pi r[/tex]
Given:
[tex]r=19 cm\\\pi =3.14[/tex]
Putting the given values in the formula of circumference of the circle
= [tex]2*3.14*19[/tex]
= [tex]119.32[/tex] [tex]cm[/tex]
On putting the value of radius and [tex]\pi[/tex] in the formula the circumference of the circle is ≈[tex]119.32[/tex] [tex]cm[/tex]
What is the following product?
(√14-√3)(√12+√7)
Answer:
12.28
Step-by-step explanation:
[tex]\sqrt{14}-\sqrt{3} )(\sqrt{12}+\sqrt{7})[/tex]
Multiplying [tex]\sqrt{14} and\sqrt{3}[/tex] individually to the values inside the brackets to find the product of the equation.
[tex]\sqrt{14}\sqrt{12}+\sqrt{14}\sqrt{7}-\sqrt{3}\sqrt{12} -\sqrt{3} \sqrt{7}[/tex]
[tex]\sqrt{168} +\sqrt{98} -\sqrt{36}- \sqrt{21}\\2\sqrt{42}+7\sqrt{2}-6-\sqrt{21}\\ 12.96 +9.90 -6 -4.58\\12.28[/tex]
The product of the above values is 12.28
Answer:
2√42 + 7√2 - √21 - 6
Step-by-step explanation:
(√14-√3)(√12+√7)
First let us expand the expression by doing the following:
√14(√12+√7) -√3(√12+√7)
√168 + √98 - √36 - √21
√(4x42) + √(49x2) - 6 - √21
2√42 + 7√2 - √21 - 6