Answer:
18.19
Step-by-step explanation:
$20-15%=$17
$17+7%=18.19
Lin's father pays $18.19 for the meal after the 15% discount and 7% sales tax.
Explanation:To find out what Lin's father pays for the meal after the discount and sales tax, we need to follow these steps:
Calculate the amount of the discount by multiplying the original price by the discount rate.Subtract the discount amount from the original price to find the discounted price.Calculate the amount of the sales tax by multiplying the discounted price by the sales tax rate.Add the sales tax amount to the discounted price to find the total amount paid for the meal.Let's apply these steps to the given information:
Discount rate: 15%Sales tax rate: 7%Original price: $20Step 1: Discount amount = $20 x 15% = $3
Step 2: Discounted price = $20 - $3 = $17
Step 3: Sales tax amount = $17 x 7% = $1.19
Step 4: Total amount paid = $17 + $1.19 = $18.19
Therefore, Lin's father pays $18.19 for the meal after the discount and sales tax.
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simplify 3(4x+7)−4(12x−15)
The expression 3(4x+7)−4(12x−15) simplifies to -36x + 81. First distribute the constants to the terms inside the parentheses, then combine like terms.
Explanation:In mathematics, to simplify an algebraic expression like 3(4x+7)−4(12x−15), you need to perform the operations in a certain order, respecting the laws of arithmetic. This is often referred to as simplifying the expression using the distributive property.
First, distribute the 3 to both of the terms in the first set of parentheses: 3 * 4x + 3 * 7 equals 12x + 21.Next, distribute the -4 to both of the terms in the second set of parentheses: -4 * 12x -4 * -15 equals -48x + 60.Combine like terms: 12x - 48x equals -36x. Similarly, 21 + 60 equals 81.So the original expression, 3(4x+7)−4(12x−15), simplifies to -36x + 81.Learn more about Simplifying Algebraic Expressions here:
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Which option gives f(x) = x² - 4x - 12 rewritten in vertex form as well as the function's correct axis of symmetry ?
f(x) = (x - 2)² - 16, x = - 16
f?(x) = (x + 2)(x - 6), x = 6
f(x) = (x + 2)(x - 6), x = -2
f(x) = (x - 2)² - 16, x = 2
y
=
−
(
x
−
2
)
2
+
16
is the vertex form
Explanation:
The vertex form of a quadratic function is given by
y
=
a
(
x
−
h
)
2
+
k
where (h, k) is the vertex of the parabola.
when written in vertex form
(h, k) is the vertex of the parabola and x = h is the axis of symmetry
the h represents a horizontal shift (how far left, or right the graph has shifted from x = 0)
the k represents a vertical shift (how far up, or down the graph has shifted from y = 0)
Now let convert this
y
=
−
x
2
+
4
x
+
12
into vertex form
y
=
−
x
2
+
4
x
+
12
y
−
12
=
−
x
2
+
4
x
y
−
12
=
−
(
x
2
−
4
x
)
y
−
12
=
−
(
x
2
−
4
x
+
4
−
4
)
y
−
12
=
−
(
x
2
−
4
x
+
4
)
+
4
y
−
16
=
−
(
x
2
−
4
x
+
4
)
y
−
16
=
−
(
x
−
2
)
2
y
=
−
(
x
−
2
)
2
+
16
is the vertex form
show the vertex in the figure below
graph{-x^2+4x+12 [-10.06, 15.25, 6.58, 19.25]} Hope iam right
The function f(x) = x² - 4x - 12 in vertex form is f(x) = (x - 2)² - 16, and the axis of symmetry is x = 2.
To rewrite the function f(x) = x² - 4x - 12 in vertex form and find the axis of symmetry, we need to complete the square. The general vertex form of a quadratic is f(x) = a(x - h)² + k, where (h, k) is the vertex, and the line x = h is the axis of symmetry.
The first step is to factor the coefficient of x², which is 1 in this case, so we can leave it as is. The next step is to rearrange the equation as x² - 4x and then add and subtract the square of half the coefficient of x, which is (4/2)² = 4. Adding and subtracting 4 inside the parentheses gives us:
f(x) = (x² - 4x + 4) - 4 - 12
Now we can rewrite this as:
f(x) = (x - 2)² - 16
This equation is in vertex form, with the vertex at (2, -16), and the axis of symmetry is the line x = 2.
Therefore, the correct option is f(x) = (x - 2)² - 16, with the axis of symmetry being x = 2.
2x - y = -13
2x + y = 1
Answer:
x = -3
y = 7
Step-by-step explanation:
During one waiter's shift, he delivered 13 appetizers, 17 entrees, and 10 desserts. what percentage of the dishes he delivered were
Question
During one waiters shift he delivered 13 appetizers, 17 entrées, and 10 desserts what percentage of the dishes he delivered were: A. Desserts B. Appetizers C. entrees
Answer:
A)Desserts = 25 %
B)Appetizers = 32.5 %
C)Entrées = 32.5 %
Step-by-step explanation:
Given:
Number of appetisers = 13
Number of entrees = 17
Number of desserts = 10
Solution:
Total number of dishes = 13 + 17 + 10 = 40
percentage of the dishes he delivered were Desserts is = [tex]\frac{10}{40} \times 100 = 0.25 \times 100 = 25%[/tex]
percentage of the dishes he delivered were Appetizers is =[tex]\frac{13}{40}\times 100 = 0.325 \times 100[/tex] = 32.5%
percentage of the dishes he delivered were Entrées is = [tex]\frac{17}{40} \times 100 = 0.425 \times 100[/tex]= 42.5 %
To find the percentage of each type of dish a waiter has delivered, add up the total number of dishes, then divide the number of each type of dish by this total and multiply by 100.
Explanation:The subject question requires us to determine what the percentage is of the various types of dishes a waiter delivers during his shift. We're given that the waiter delivered 13 appetizers, 17 entrees, and 10 desserts. We can solve this by doing some basic calculations:
First, we need to figure out the total number of dishes the waiter delivered. We do this by adding together the appetizers, entrees, and desserts he delivered: 13 appetizers + 17 entrees + 10 desserts = 40 dishes in total.
Next, to find the percentage of each type of dish, we divide the number of that type of dish by the total number of dishes, and then multiply the result by 100. For example, for appetizers: (13 appetizers / 40 total dishes) * 100 = 32.5%.
You can do the same calculations for entrees and desserts to find their percentages. These basic calculations are useful not only in a restaurant setting, but also in allocation of tasks in modern businesses and in many other real-world scenarios.
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What is the coefficient of the c-term of the algebraic expression 14 a minus 72 r minus c minus 34 d?
When there's no number in front of a variable, that means it has a coefficient of 1.
So the coefficient is 1. Hope that makes sense.
The coefficient of the c-term of the algebraic expression 14a - 72r - c - 34d is -1.
What is an expression?It is defined as the combination of constants and variables with mathematical operators.
We have an algebraic expression:
= 14a - 72r - c - 34d
From the above equation, the coefficient of the c term is:
= -1
Thus, the coefficient of the c-term of the algebraic expression 14a - 72r - c - 34d is -1.
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Janey wants to add 2 more equal sections to the garden. She tells Mika to buy11 tomato plants if she wants to use 3/4 of the garden for tomatoes. Is Janey correct?
What scale factor was used in the dilation shown below?
Answer:
-3
Step-by-step explanation:
to find the scale factor dividex^1 by x (so old shape to new shape)
Solve and explain please
Therefore the inequality is x≤11
and maximum I can withdraw 11 bills.
Step-by-step explanation:
Given ,
Current balance $320
Minimum balance $100
I could spent =$(320-100) = $220
Let the number of bills be x.
Total amount of x bills = $20x
According to the problem,
20x≤ 220
⇔x ≤ [tex]\frac{220}{20}[/tex]
⇔x≤11
Therefore the inequality is x≤11
and maximum I can withdraw 11 bills.
PLS HELP ASAP I WILL MARK BRAINLIEST FOR WHOEVER ANSWERS FIRST AND CORRECTLY!!
Consider the function represented by the table.
What is f(0)?
4
5
6
7
Table:
x | f(x)
0 | 6
2 | 7
4 | 0
7 | 5
Answer:
We are given the table as:
x f(x)
0 6
2 7
4 0
7 5
i.e. corresponding to different values of x we are given the values of f(x)
we have to find the value of f(0)
i.e. we have to find the value of f(x) when x=0
As we can see from the table the value of f(x) at x=0 is 6
Hence, Correct option is:
C) 6
Have a Great day!
Answer:
c
Step-by-step explanation:
Simplify: -(-6x + 3)
Which expression is equivalent to 6y - 12
Answer:-12+6y
Step-by-step explanation:
Since the 12 is a negative and the 6y is a positive you can switch it around.
The expression 6y - 12 is equivalent to 6(y - 2). This can be verified by expanding the factored form, which results in the original expression.
This expression can be factored to find an equivalent expression. Factoring out the greatest common factor (GCF) from both terms, we get:
6y and 12. The GCF is 6.Factor out the GCF: 6(y - 2).Thus, the expression 6y - 12 is equivalent to 6(y - 2).
ASAP PLS !! WILL MARK BRAINLIST
Answer:
it is D. $9.50
Step-by-step explanation:
Answer: The answer is (D) $9.50/9.50 dollars
The function S(D) =(7/2) √2D can be used to approximate the speed S, in miles per hour, of a car that has left skid marks of length D, in feet. How fast would would a car have been traveling if it left a skid mark that is 102.04 feet long?
Answer: The other answer is wrong. The answer would be about 50 miles per hour or 49.99 mph.
Step-by-step explanation:
The required approximate speed of the car when the skid mark is 10204 feet long is 49.99 miles per hour.
Given that,
The function S(D) =(7/2) √2D can be used to approximate the speed S, in miles per hour, of a car that has left skid marks of length D, in feet, how fast would a car have been traveling if it left a skid mark that is 102.04 feet long is to be determined.
Functions are the relationship between sets of values. e g y=f(x), for every value of x there is its exists in a set of y. x is the independent variable while Y is the dependent variable.
Here,
Given the function of speed,
S(D) =(7/2) √(2D)
Substitute the value of D = 102.04
S(102.04) = (7/2)√(2*102.04)
S(102.04) = 49.99
Thus, the required approximate speed of the car when the skid mark is 10204 feet long is 49.99 miles per hour.
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The graph of which function has an axis of symmetry at x = 3?
f(x) = x2 + 3x + 1 On a coordinate plane, a parabola opens up. It goes through (negative 4, 5), has a vertex at (negative 1.75, 6.75), and goes through (1, 5).
f(x) = x2 – 3x – 3 On a coordinate plane, a parabola opens up. It goes through (negative 2, 7), has a vertex at (1.75, 5), and goes through (5, 7).
f(x) = x2 + 6x + 3 On a coordinate plane, a parabola opens up. It goes through (negative 6, 3), has a vertex at (negative 3, negative 6), and goes through (0, 3).
f(x) = x2 – 6x – 1 On a coordinate plane, a parabola opens up. It goes through (0, negative 1), has a vertex at (3, negative 10), and goes through (6, 0).
Answer:
The function in the fourth option will have an axis of symmetry at x = 3.
Step-by-step explanation:
We have to choose the function from options, the graph of which has an axis of symmetry at x = 3.
The function in the fourth option will have an axis of symmetry at x = 3.
It is f(x) = x2 – 6x – 1 On a coordinate plane, a parabola opens up. It goes through (0, negative 1), has a vertex at (3, negative 10), and goes through (6, 0). (Answer)
Answer:
D
Step-by-step explanation:
How do you solve 6x+18=2(3x+9)
Answer:
infinite solutions
Step-by-step explanation:
6x + 18 = 2(3x + 9)
1. 6x + 18 = 6x + 18 Distribute the 2
2. X can be any number since they are the same.
What is 5 1/2 in a whole number
Answer:
6
Step-by-step explanation:
5 1/2
(5×2+1)/2
11/2
5.5
6 ( nearest whole number)
What is the area of the following circle?
Either enter an exact answer in terms of # or use 3.14 for
i and enter your answer as a decimal.
d=8
Answer:
The answer is 28.27
What is the slope of the line passing through the points (2, 5) and (0, -4)?
9/2
2/9
-9/2
-2/9
Answer:
9/2
Step-by-step explanation:
Slope of line=rise/run=
y2-y1/x2-x1
Where
x1=2
x2=0
y1=5
y2= -4
Slope =(-4-5)/(0-2)
Slope=-9/-2
Slope=9/2
Answer:
look at the picture shown
John and his best friend found some money and is in an envelope they split the money equally getting 14 how much money did they find
Answer:
$28
Step-by-step explanation:
Since each person got $14 and we know that there are 2 people receiving money, the total amount of money is equal to the amount of money John received, added to the amount of money his best friend got. Since both received $14, we can use the following equation:
Money found = $14 + $14 = $28
Find the area of the triangle below. Show as much work as possible.
The area of the triangle is (5/12)x²
Step-by-step explanation:
Area of a triangle = 1/2 bhb is the base of the triangle.h is the height of the triangle.Substitute b=(5/6)x and h=x
Area = 1/2[tex]\times[/tex](5/6)x(x)
Area of triangle = (5/12)x²
Fred spent half of his allowance going to the movies. He washed the family car and earned 9 dollars. What is his weekly allowance if he ended with 11 dollars?
Answer:
Weekly allowance $4
Step-by-step explanation:
Fred ended with $11. So, subtract $9 from washing the car.
$11 - $9 = $2
$2 Is the amount of weekly allowance Fred hasn't spent yet. However, at the beginning of the week, Fred used half his allowance. This means $2 was what was left. So,
$2 × 2 = $4
meaning Fred had $4 in allowance at the beginning of the week.
What is the half of 14.5
Answer:
7.25
Explanation:
14.5×½=7.25
Find the area of the circle if it has a circumference of 40
Answer:
127.39 square units
Step-by-step explanation:
We are given;
Circumference of the circle as 40 unitsWe are supposed to determine its area;
The circumference of a circle is given by;Circumference = πD or 2πr , where D is the diameter and r is the radius
Thus;
40 = 2πr
πr = 20
r = 20/π
Area of a circle is given by;
A = πr²
but, r = 20/π
Hence;
Area = π × (20/π)²
= π × 400/π²
= 400/π
Taking π to be 3.14
Area = 400 ÷ 3.14
= 127.39 square units
Thus, the area of the circle is 127.39 square units
Is 23 a compatible number?
Answer:
In mathematics, compatible numbers are the numbers that are easy to add, subtract, multiply, or divide mentally...For instance, if we have to add 493 and 549, we can make the numbers compatible by rounding them up to the nearest tens or hundreds.
SO YES! :)
Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
Hana wants to buy a charm bracelet. Dayton Fine Jewelry charges $17 per charm, plus $62 for the bracelet. Cain Jewelers, in contrast, charges $18 per charm and $60 for the bracelet. If Hana wants to add a certain number of charms to her bracelet, the cost will be the same at either jewelry shop. What would the total cost of the bracelet be? How many charms would that be?
Final answer:
To determine the number of charms for the bracelet to cost the same at both jewelry shops, we set up a system of equations and solved it using substitution. We found that Hana will need to add 2 charms, resulting in a total cost of $96 for the bracelet at either shop.
Explanation:
To determine the number of charms Hana can add to her bracelet such that the cost is the same at Dayton Fine Jewelry and Cain Jewelers, we need to set up a system of equations and solve using the substitution method.
System of Equations:
Let x represent the number of charms and y represent the total cost of the bracelet with charms.
Equation for Dayton Fine Jewelry: y = 17x + 62
Equation for Cain Jewelers: y = 18x + 60
Solution Using Substitution:
Set the two equations equal to each other since the cost is the same:Hana will need to add 2 charms to her bracelet, and the total cost of the bracelet will be $96 at either jewelry shop.
a sign says that the price marked on all music equipment is 30% off the original price you buy an electric guitar for sale price of $315 what is the original price
The original price is $450.
Step-by-step explanation:
Step 1:
Given details, Discount%, D% = 30 and Selling Price, SP = $315
Step 2:
Write down formula for calculating the Original Price
Selling Price (SP) = Original Price (OP) - Discount (D)
Discount (D) = Original Price (OP) * (D%/100)
Step 3:
Substitute given values in the formula
315 = OP - D
D = [tex]OP \times30/100[/tex]
D = 0.3 OP
Step 4:
Substitute value of D in the first formula
315 = OP - 0.3 OP
315 = OP (1 - 0.3) = 0.7 OP
Original Price, OP = 315/0.7 = $450
Lauren's bedroom measures 18 feet by 12 feet, with a closet that measures 2 feet by 4 feet. If carpet costs $4.15 per square foot, how much will it cost to carpet Lauren's room and closet?
Answer:
$929.60
Step-by-step explanation:
step 1
Find the area of Lauren's bedroom
Remember that the area of a rectangle is equal to
[tex]A=LW[/tex]
so
[tex]A=(18)(12)=216\ ft^2[/tex]
step 2
Find the area of closet
Remember that the area of a rectangle is equal to
[tex]A=LW[/tex]
so
[tex]A=(2)(4)=8\ ft^2[/tex]
step 3
Find the total area
Adds the areas
[tex]216+8=224\ ft^2[/tex]
step 4
Find the cost
Multiply the total area by the cost per square feet
so
[tex]224(4.15)=\$929.60[/tex]
Final answer:
The cost to carpet Lauren's bedroom including her closet is found by calculating the total area and then multiplying by the carpet's cost per square foot. The total area is 224 square feet and with a carpet cost of $4.15 per square foot, the total cost is $930.40.
Explanation:
To calculate the cost to carpet Lauren's room and closet, we must first determine the total area that needs to be carpeted. We already know that the room measures 18 feet by 12 feet. Taking the square footage of the room, we perform a multiplication: 18 ft imes 12 ft = 216 square feet.
Next, we calculate the area of the closet separately, which measures 2 feet by 4 feet. The calculation would be 2 ft imes 4 ft = 8 square feet. Now, we add the area of the room and the closet to get the combined area: 216 sq ft + 8 sq ft = 224 square feet.
Lastly, we find the cost to carpet this combined area. The carpet costs $4.15 per square foot, therefore, we multiply the total area by the cost per square foot: 224 sq ft imes $4.15/sq ft = $930.40. So, the total cost to carpet Lauren's room and closet will be $930.40.
Tell how you could use a proportion to find 125% of 500. Why is the solution greater than the original number?
11-5 6th grade work
Answer:
625
Step-by-step explanation:
We have to find 125% of 500
= [tex]\frac{125}{100} * 500 = 1 .25 * 500[/tex] = 625 .
Here the solution (625) is greater than the original (500) because the percentage value is more than 100% . so the answer will come more than its original value.
15. A band expects to have 16 songs on their next
album. The band writes and records 62.5% more
songs than they expect to have in the album.
During the editing process, 50% of the songs are
removed. How many songs will there be in the
final album?
Answer:
There will be 13 songs in the final album.
Step-by-step explanation:
i) number of songs expected = 16 songs
ii) the band wrrites 62.5% more
therefore the band writes [tex]16 \times ( 1 + 0.625) = 16 \times 1.625 = 26[/tex] songs
iii) During the editing process 50% of the songs are removed.
Therefore there will be in the final album = [tex]( 1 - 0.5) \times 26 = 0.5 \times 26 = 13[/tex] songs.
In a survey at a shoe store, 200 customers were asked whether they have
running shoes or basketball shoes. The results are in the relative frequency
table.
A. 58%
B. 60%
C. 42%
D. 40%
Answer: 42%
Step-by-step explanation:
Add 0.16 and 0.26, you get 0.42. Covert 0.42 into percentage and you get 42%