Answer:
16 year olds had the higher ratio of black belts to brown belts.
Step-by-step explanation:
15 year olds: 8/28 students had black belts
8/28 = 28.6% had black belts
16 year olds: 10/27 students had bald belts
10/27 = 37.0% had black belts
How many gallons of a 50% antifreeze solution must be mixed with 70 gallons of 30% antifreeze to get a mixture that is 40% antifreeze?
Answer:
70 gallons
Step-by-step explanation:
x gallon of 50%
x * 0.5 + 70 * 0.3 = (x + 70) * 0.4
0.5x + 21 = 0.4x + 28
0.1x = 7
x = 70
To get a mixture that is 40% antifreeze, we need to mix 70 gallons of 30% antifreeze solution with 40 gallons of 50% antifreeze solution. This conclusion is reached by establishing an equation representing the total amount of antifreeze in the mixture before and after and then solving for the unknown.
Explanation:Your question deals with the concept of a weight ratio in a chemical mixture. Specifically, we're going to solve it using algebra. Let's say you need x gallons of the 50% antifreeze solution. We can work this out by forming an equation based on the information given in the problem:
The total amount of antifreeze in the 70 gallons of 30% solution and x gallons of 50% solution must be equal to the total amount of antifreeze in the (70 + x) gallons of 40% solution.
Therefore, we can write: 0.3 * 70 + 0.5 * x = 0.4 * (70 + x)
Solving the equation above, we find that x equals 40 gallons. So, you would need to mix 40 gallons of a 50% antifreeze solution with 70 gallons of 30% solution to obtain a final solution with a 40% antifreeze concentration.
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Order -9, 5, 6, and -4 from least to greatest.
a. -9, -4, 5, 6 c. -9, -4, 6, 5
b. 6, 5, -4, -9 d. -4, -9, 5, 6
The answer is a. -9, -4, 5, 6.
⭐ Answered by Hyperrspace (Ace) ⭐
⭐ Brainliest would be appreciated, I'm trying to reach genius! ⭐
⭐ If you have questions, leave a comment, I'm happy to help! ⭐
Answer:
Option A: -9, -4, 5, 6
Step-by-step explanation:
Since the lowest number is -9, it should go first
Since the 2nd lowest number is -4, it should go second
Since the 3rd lowest number is 5, it should go third
Since the 4th lowest number is 6, it should go fourth
Answer: Option A, -9, -4, 5, 6
A number to the 9 power divided by the same number to the 6 power equals 27 what is the number
Answer:
3
Step-by-step explanation:
n^9/ n^6 = 27
n^9 - 6 = 27
n^3 = 27
n = ∛27
n = 3
I need help with pythagoras’ theorem
Answer:
Pythagoras’ theorem is a way to find a side or hypothesis when you have 2 sides.
The formula is: a^2 + b^2 = c^2
a and b are sides
c is the hypothesis
Ex: A triangle has a leg that is 5 inches and a leg that is 7 inches. Find the hypothesis using Pythagoras' theorem.
A leg is another way of saying a side.
5^2 + 7^2 = c^2
25 + 49 = x^2
sqrt(74) = sqrt(x^2)
sqrt(74) inches = hypothesis
Ex: A triangle has a leg that is 9 feet and a hypothesis that is 25 feet. Find the other leg using Pythagoras' theorem.
9^2 + b^2 = 25^2
81 + b^2 - 81 = 625 - 81
sqrt(b^2) = sqrt(544)
b = sqrt(554)
Do you understand more?
Rupert is copying some files from his computer to a compact disc, like the one shown above.
If the diameter of the compact disc is 120 millimeters, what is the approximate area ignoring the center hole? (Use 3.14 for pi.)
A.
376.8 mm2
B.
11,304 mm2
C.
753.6 mm2
D.
45,216 mm2
Option B: [tex]11,304 \mathrm{mm} ^2[/tex] is the area of the compact disc.
Explanation:
The diameter of the compact disc is [tex]120mm[/tex].
To determine the area of the compact disc, let us substitute the values in the area of the circle formula,
[tex]A=\pi r^2[/tex] where [tex]r=\frac{d}{2}[/tex]
Substituting the value of d in [tex]r=\frac{d}{2}[/tex], we get,
[tex]r=\frac{120}{2} =60[/tex]
Thus, [tex]r=60[/tex] and [tex]\pi=3.14[/tex]. Let us substitute these values in [tex]A=\pi r^2[/tex], we get,
[tex]A=3.14\times(60)^2[/tex]
Simplifying, we have,
[tex]A=3.14\times3600[/tex]
Multiplying, we get,
[tex]A=11304mm^2[/tex]
Thus, the area of the compact disc is [tex]11,304 \mathrm{mm} ^2[/tex]
Hence, Option B is the correct answer.
If these two figures are similar, what is the measure of the missing angle? 180 90 70 110
Answer:
70
Step-by-step explanation:
Answer:
70
Step-by-step explanation:
3/3 as a whole number
Answer:1
Step-by-step explanation:
3 full parts out of 3 is 1
Answer:
1
Step-by-step explanation:
Any number over itself always simplifies to 1
Which of the following best describes the situation below?
The number of miles a car can run depends on the gallons of gasoline in the
tank.
O
O
O
A. A relation that is not a function
B. A relation that is a function
C. The range of a function
D. The domain of a function
Answer:
c
Step-by-step explanation:
The situation described where the number of miles a car can run depends on the gallons of gasoline in the tank is a relation that is a function. Because for each amount of gas, there is one corresponding maximum distance the car can travel.
Explanation:The situation described illustrates a relation that is a function. In this case, the amount of gasoline (in gallons) in the car's tank is the input or the independent variable (the domain), and the distance the vehicle can travel (the output or dependent variable) is a function of this input. For each amount of gasoline, there is only one corresponding maximum distance the car can travel, so this is a function. Thus, the best answer is B. A relation that is a function.
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LULUI VIEW
If f(x) = 4x and g(x)= x4 - 2, what is go f(x)?
Answer:
256[tex]x^{4}[/tex] - 2
Step-by-step explanation:
To evaluate (g ￮ f )(x), substitute x = f(x) into g(x)
g(4x) = [tex](4x)^{4}[/tex] - 2 = 256[tex]x^{4}[/tex] - 2
Out of 25 attempts, a basketball player scored 17 times. One-half of the missed shots are what % of the total shots?
Answer:
%16
Step-by-step explanation:
Step 1: Find the shots missed
25 - 17 = 8
Step 2: Find half of the shots missed
8 / 2 = 4
Step 3: Divide 4 by 25
4/25 = 0.16
Step 4: Convert to Percent
0.16 * 100 = %16
Answer: %16
GIVEN THE FUNCTION F(X) =3X + 5 AND X SUCH THAT F(X)=38
The value of X is 11.
Step-by-step explanation:
Given,
F(X) = 3X + 5 --------(1)F(X) = 38 ------------(2)Equating eq(1) and (2),
⇒ 3X+5 = 38
⇒ 3X = 38-5
⇒ X = 33/3
⇒ X = 11
Nat put $550 in an account which pays four percent interest, compounded semiannually. How much will be in the account in three years?
The final answer will be rounding it up to $619.
Step-by-step explanation:
4% = 0.04
1 represents 100%
therefore,
(( 1 + 0.04)^3)x 550
= (1.04^3) x 550
= 1.124864 x 550
= $618.6752
The final answer will be rounding it up to $619.
pls help!
Multiply the following polynomials. 3x3(5x2+4x)
8x6+7x3
15x6+12x4
15x6+12x3
15x5+12x4
8x5+7x4
15x5+12x3
Answer:
78
Step-by-step explanation:
you multiply
Answer:
15x^9+12x^4
b is the answer
suppose you are performing an experiment in science class in which you start with 70 bacteria and the amount of bacteria triples every hour write a function to represent the growth of the bacteria overtime in your science experiment
The function to represent the growth of the bacteria overtime in your science experiment is:
[tex]y = 70(3^x)[/tex]
Solution:
Given that,
Suppose you are performing an experiment in science class in which you start with 70 bacteria and the amount of bacteria triples every hour
Let,
y is the number of bacteria at time x
x is the number of hour(time)
As per the given information,
You start your experiment with 70 bacteria,and the bacteria triples in every hour
Therefore,
At end of 1 hour,
y = 70 x 3 = 210
At the end of 2 hours,
[tex]y = 210 \times 3 = 630\\\\Which\ can\ also\ be\ written\ as\\\\y = 70 \times 3^2 = 70 \times 9 = 630[/tex]
At the end of 3 hours,
[tex]y = 630 \times 3 =1890 \\\\Which\ can\ also\ be\ written\ as\\\\y = 70 \times 3^3 = 70 \times 27 = 1890[/tex]
Thus at end of "x" hours we will have,
[tex]y = 70 \times 3^x\\\\y = 70(3^x)[/tex]
Thus the function to represent the growth of the bacteria overtime in your science experiment
A 20,000 deposit earns 3.6% interest for 3 years. If no money is deposited or withdrawn how much interest will ever earned at the end of 3 years?
Answer:2,160
Step-by-step explanation:Multiply 20,000 by the percent then multiply the number you get by 3
please show work read what the question wants in both pictures
Answer:
2) m∠CBD = 60 3) x=15; 95 and 85 4) 12 = x; 98 for both angles
Step-by-step explanation:
2) 2x + 14 + x + 7 = 90 The angles add up to 90 degrees
3x + 21 = 90 Combine like terms
- 21 - 21 Subtract 21 from both sides
3x = 69 Divide both sides by 3
x = 23
Plug 23 in the equation
2(23) + 14
46 + 14
60
3) 2x + 65 + 3x + 40 = 180 The angles add up to 180 degrees
5x + 105 = 180 Combine like terms
- 105 - 105 Subtract 105 from both sides
5x = 75 Divide both sides by 5
x = 15
Plug in 15 into both equations
2(15) + 65 = 95
3(15) + 40 = 85
4) 5x + 38 = 9x - 10
- 5x - 5x Subtract 5x from both sides
38 = 4x - 10
+ 10 + 10 Add 10 to both sides
48 = 4x Divide both sides by 4
12 = x
Plug in 12 into both equations
5(12) + 38 = 98
9(12) - 10 = 98
How many cube-shaped boxes with 12-inch edges can fit into a box thatis 4
feet tall, 4 feet long, and 5 feet wide?
Answer:
80
Step-by-step explanation:
First recall that:
1 inch=12 feet
The volume of cube-shaped boxes with 12-inch edges is 1 cm³
The volume of a box that is 4
feet tall, 4 feet long, and 5 feet wide is
given by:
[tex]Volume = lwh[/tex]
We substitute l=4ft, w=5ft and h=4ft
To obtain:
[tex]Volume = 4 \times 4 \times 5 = 80 {ft}^{3} [/tex]
Therefore 80 cube-shaped boxes with 12-inch edges can fit into a box that is 4
feet tall, 4 feet long, and 5 feet wide.
Expression equivalent to (0.28t-0.3)-(0.7t-0.28)?
A. 0.42t+0.58
B. -0.42t-0.02
C. 0.42t-0.02
D. -0.42t+0.58
Please help!
Write 2.14 in word form
Answer:
two dollars and fourteen cents
Step-by-step explanation:
Answer:two point fourteen
Step-by-step explanation:
What is the equation of the following line? Be sure to scroll down first to see
all answer options.
Answer: y=- 1/3x
Step-by-step explanation:
Which one is bigger 64 in or 5 ft
64 inches
Step-by-step explanation:
12 inches equals 1 foot so
12*5=60 inches which means it will be bigger than 5 feet.
Which numbers are greater?
1.) 3/4 or 70%
2.) 1/2 or o.54
3.) 0.21 or 21%
4.) 2/3 or 66%
Answer:
1. 3/4
2. 54%
3. Both equal
4. Both equal
Step-by-step explanation:
Answer:
1.) 3/4
2.)0.54
3.) Both
4.) 2/3
In sixth grade, Manuel reads 35 books this year the books he read increase 40% how many books had he read
Answer: 49 books
Step-by-step explanation:
Number of books read by Manuel this year = 35
Increment in reading rate = 40%
Therefore, we now find 40% of 35 and add it to 35 to know the number of books he had read
Number of books read = 40% of 35
= 40/100 x 35
= 14 books
Total number of books read = 35 + 14
= 49 books
Answer:
Step-by-step explanation:
50
Which of these statements are correct about a line segment with a length of 12 units in a coordinate plane? Select all that apply.
Correct statements are:
If it is reflected across the y-axis, its length still will be 12 units.
If it is rotated 270° about the origin, its length still will be 12 units.
If it is translated 15 units up, its length still will be 12 units.
Step-by-step explanation:
Whatever it may be rotation, reflection or translation, the size of the line will never change. So length of the line is same as 12 units in the image.
So the wrong statements are
If its reflected across y = -x then the length will no longer be 12 units.
If it is rotated 90° about the origin, then the length will no longer be 12 units.
If it is translated 18 units to the right, then the length will no longer be 12 units.
You can use the fact that reflection, rotation or translation, all three are not modifying the line itself and only its position can change. Whatever be the position, if the line segment itself isn't modified, the length will be same.
Thus, the correct choices are:
Option A: If it is reflected across the y-axis, the length will still be 12 units.Option B: If it is rotated 270° about the origin, its length still will be 12 units.Option E: If it is translated 15 units up, its length still will be 12 units.Rest of the choices are wrong since they blame reflection or rotation or translation to modify the length of that line segment.
Why is the length of a line segment not modified when it is reflected along an axis, rotated or translated by some units in some direction?Suppose you've got a baseball stick. Will it's length change when you take it somewhere else like from your home to playground? No. Will its length change if you hold it upside down? No.
This is the same case with line segment being rotated, reflected, or translated. All these processes do not change the line segment's length and can just move that line segment from one position to other.
Using above conclusion to find the correct options in the given contextSince reflection, rotation, or translation won't affect the length of the line segment,.
Thus, the correct choices are:
Option A: If it is reflected across the y-axis, the length will still be 12 units.Option B: If it is rotated 270° about the origin, its length still will be 12 units.Option E: If it is translated 15 units up, its length still will be 12 units.Rest of the choices are wrong since they blame reflection or rotation or translation to modify the length of that line segment.
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twenty is 150% of what number
13.33.
We have, 150% × x = 20
or,
150
100
× x = 20
Multiplying both sides by 100 and dividing both sides by 150,
we have x = 20 ×
100
150
x = 13.33
If you are using a calculator, simply enter 20×100÷150, which will give you the answer.
Oi, give flamenco brainliest.
a student earns 42 points out of 60 points on a test what percent of the points did the student answer
Answer:
It would be a 70%
Step-by-step explanation:
Convert fraction (ratio) 42 / 60 Answer: 70%
Answer:
I think 24% percent?????
Carle is cutting pieces of string that are exactly 24 3/8 inches long. How many pieces can she cut from a ball of string that has 100 feet
49 pieces of string can be cut from a ball of string that has 100 feet
Solution:
Given that, Carle is cutting pieces of string that are exactly 24 3/8 inches long
Therefore,
[tex]Length\ of\ each\ string = 24\frac{3}{8}\ inches = \frac{8 \times 24 + 3}{8} = \frac{195}{8}\ inches[/tex]
How many pieces can she cut from a ball of string that has 100 feet
Total length of string = 100 feet
Convert feet to inches
1 feet = 12 inch
100 feet = 1200 inch
Therefore, number of pieces that can be cut is given as:
[tex]\text{Number of pieces } = \frac{\text{total length of string}}{\text{length of each string}}[/tex]
Substituting the values we get,
[tex]\text{Number of pieces } = \frac{1200}{\frac{195}{8}}\\\\\text{Number of pieces } = 1200 \times \frac{8}{195}\\\\\text{Number of pieces } = 49.2307 \approx 49[/tex]
Therefore, 49 pieces of string can be cut from a ball of string that has 100 feet
Solve 3(x - 2) < 18.
{x | x < 8}
{x | x > 8}
{x | x < -8}
{x | x > -8}
Answer:
3x - 6 < 18
3x < 24
x < 8
answer is a
Find the area of the triangle below. Show as much work as possible. Label your answer appropriately.
Answer:
[tex]Area=\frac{5}{12}x^2[/tex]
Step-by-step explanation:
The area of a triangle is given by:
[tex]Area=\frac{1}{2}*base*height[/tex]
From the diagram [tex]base=\frac{5}{6}x,and,height=x[/tex]
We substitute into the formula to get:
[tex]Area=\frac{1}{2}*\frac{5}{6}x*x[/tex]
This implies that:
[tex]Area=\frac{5}{12}x^2[/tex]
Gilberto’s grandfather gives him $5 for his birthday and then $.50 for each math question he answers correctly on his math exams for the year. Write an equation that represents the amount of money that Gilberto receives during the school year. Explain what the variables and numbers mean.
Answer:
Therefore total amount of money that he got is = $(5+0.50x) [ x = number of correct math]Step-by-step explanation:
Given, Gilberto's grandfather gives him $5 for his birthday and then$0.50 for each math he answers correctly on his math exam for the year.
Let , the number of math that he answers correctly on his his math exam for the year is x
Therefore he got = $(0.50× x) =$ 0.50x for doing correct math.
Therefore total amount of money that he got is = $(5+0.50x) [ x = number of correct math]