Mathematics High School

Sam has a total of 43 quarters and nickels in her purse. If her change is worth $7.75, how many nickels and how many quarters does Sam have?
Warning: This is Algebra 1

Answers

Answer 1

Answer:

i need help with this too\

Step-by-step explanation:

Answer 2
Let q= the number of quarters
Let n=the number of nickels

q+n=43 This equations represents the total number of coins.
0.25q+0.05n=7.75 This equations represents her change totaling to $7.75.

Multiply the second equation by 100 to simplify the arithmetic.

q+n=43
25q+5n=775 Multiply the first equation by -5.

-5q-5n=-215
25q+5n=775 Add the two equation in which the n variable gets eliminated.
20q=560 Divide both sides by 20.

q=28 Substitute q=28 into the first equation and solve for n.
28+n=43
-28 -28
n=15 Therefore, she has 28 quarters and 15 nickels in her purse.

Hope this helps.

Related Questions


A quadratic function passes through the point (-7, -16) and has a vertex at (-6,
-18). Write the function in the form y = ax2 +bx+c. What are the values of a, b and
c?

Answers

Answer:

4 6 7

Step-by-step explanation:

;-;

at a school
number of boys:number of girls= 11:9
There are 124 more boys than girls.
Work out the total number of students at the school

Answers

Answer:

Total students  = 1240

Step-by-step explanation:

Boys : girls = 11 : 9

Number of boys  = 11x

Number of girls  = 9x

11x - 9x = 124

       2x = 124

         x = 124/2

        x = 62

Number of boys  = 11x = 11 *62 = 682

Number of girls  = 9x   = 9*62    = 558

Total students  = 682 + 558 = 1240

The consecutive angles of a rectangle are supplementary
a.) Sometimes
b.) Never
c.) Always

Answers

Answer:c

Step-by-step explanation:

List the angles of triangle WXY in order from smallest to largest.

Answers

Answer:  W, Y, X  (choice D)

=======================================================

Explanation:

The square angle marker means angle X is 90 degrees.

For any triangle, the three angles always add to 180

X+Y+W = 180

90+(2x+9)+(2x+1) = 180

4x+100 = 180

4x = 180-100

4x = 80

x = 80/4

x = 20

Use this x value to find the other angles

angle Y = 2x+9 = 2*20+9 = 49

angle W = 2x+1 = 2*20+1 = 41

As a check,

X+Y+W = 90+49+41 = 180

which confirms we have the right angles.

The last step is to sort the angles from smallest to largest

That would lead to W, Y, X which is choice D

The correct answer is : W, Y, X
I also attached the work on how I solved for x!

A pack of 8 batteries costs £5.99 How much does each battery cost?

Answers

Answer:

£0.75 is how much each battery costs.

Step-by-step explanation:

£5.99 ÷ 8 = £0.748

Answer:

75 cents

5.99 divided by 8 is .74 which can be rounded to .75 which is also 75 cents

Answer my math question I asked so many times I lost most of points by

Answers

Answer:

i think 3x+12=7x y

Step-by-step explanation:

how many rides can u go on for $10.00 if each ride is $0.25 ?​

Answers

Answer:

40

Step-by-step explanation:

0.25x40=10 dollars

Write n times 7 as an expression

Answers

Answer:

7n

Step-by-step explanation:

Answer:

n x 7

Step-by-step explanation:

hope this helps

Help ???????????????

Answers

Answer:

A

Step-by-step explanation:

use slope formula hope this helps

What is 50% of.......55

Answers

27.5 .,. I need 20 characters so just ignore this part lol

5
4 cm
4 cm
2 cm
6 cm
Help! I will give the Brainly

Answers

Answer:

sry i hope u find what your looking for

The length of a rectangle is 6 centimeters less than the width. The perimeter is 206 centimeters. Find the width and the length.

Answers

Answer:

34.3333333333

Step-by-step explanation:

P = $660, R = 9%, T = 2 years
I = ?



((Honestly I don't understand anything, I was busy throwing up while my teacher was showing us how to do it))​

Answers

Answer:

$ 118.80

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 9%/100 = 0.09 per year,

then, solving our equation

I = 660 × 0.09 × 2 = 118.8

I = $ 118.80

The simple interest accumulated

on a principal of $ 660.00

at a rate of 9% per year

for 2 years is $ 118.80.

I m s o d u m b t h a t i c a n t e v e n d o 1 + 1 s o i n e e d h e l p

Answers

Answer:

1 + 1 = 2

Step-by-step explanation:

:)

Answer:

1 + 1 = 2

Hope it Helps

Zahara mixed 5 quarts of dry ingredients and 2 quarts of water and a batch of concrete .She ran out of the mixture before finishing her project so she made another batch 10 quarts of dry ingredients . How many quarts of water does zahara need to add to keep the consistency the same? Complete the ratio square

Answers

Answer: 4 quarts.

Step-by-step explanation:

Given data:

Amount of dry ingredients = 5 quarts.

Amount of water in the mixture = 2 quarts.

Solution:

Let’s a represent the amount of dry ingredients.

Let b represent the amount of water

For first Batch

a/b = 5/2.

b = 2/5a ....... equation 1

For second Batch

a= 10

substitute a into equation 1 to solve for b

b = 2/5(10)

b = 4.

The ratio for batch b = 10/4.

Zahara needs to add 4 quarts of water to the mixture.

Answer:4 quarts!

Step-by-step explanation:


Match each step of the proof with the justification for the step.
[ Select]
NM -NP; NR bisects ZMNP
ZMNR PNR
[ Select]
V
[ Select]
NRNR
Therefore, ANMRSANPR
[ Select]
ZMSZP
[ Select]

Answers

Answer:

uh

Step-by-step explanation:

I need help with solving this problem please I will mark brainliest if correct !!!

Answers

Answer:

Supplementary angles

Step-by-step explanation:

The 2 angles are same- side interior angles and are supplementary

whats 1 + 77 just for you guys to get points :)

Answers

the answer is seventy eight

Answer:

78 !!!!

Step-by-step explanation:

Can sum1 help me plz
A square garden has an area of 53.29 square meters. What is the length of each side of the garden?

1) 3.8m
2) 7.3m
3) 13.3m
4) 26.6m

Answers

The answer is 3) 13.3m

Answer:

7.3m

Step-by-step explanation:

Area is l * w

The length and width of a square are the same, so that means we can use square root for this problem.

The square root of 53.29 is 7.3

7.3*7.3 = 53.29 (<- to double check)

10) Find the circumference of the circle.
Use a 3.14

Answers

Answer:

50.24

Step-by-step explanation:

2*3.14*8=50.24

2*pi*r= circumference

PLEASE HELP, DUE SOON!!

Answers

The answer is D because 1 and the angle that equals 128 degrees are equaled to 180 leaving it to be 52

r/n + t=4v solve for r

Answers

Answer:

hi

Step-by-step explanation:

r=4vn-tn

The area of a circular garden is 121pi
square feet. How much fencing would
be needed to enclose the garden?

Answers

Answer:

22 pi ft

Step-by-step explanation:

We can use the area to find the radius

A = pi r^2

121 pi = pi r^2

Divide each side by pi

121 = r^2

Take the square root

sqrt(121) = sqrt(r^2)

11= r

Now we need to find the circumference

C = 2*pi*r

C = 2* pi *11

C = 22 pi ft

Answer:

1. Use area to find radius.

  A =  π r^2

  121 π = π r^2

2. Divide each side by π.

   121 = r^2

3. Take in the square root .

    [tex]\sqrt{121} = \sqrt{r^{2} }[/tex]

   11 = r

4. Find the circumference .

   C = 2 × π × r

   C = 2 × π × 11

    C = 22 π ft

Pls can someone help me expand:(x+5)(x-8) in quadratic equation

Answers

(x + 5)(x - 8)

= x² + {5 + (-8)}x + 5(-8)

= x² - 3x - 40

What is the slope of a line that passes through the points (2,0) and (6,−12)

Answers

Answer:

slope = -3

Step-by-step explanation:

Slope formula: [tex]\frac{y2-y1}{x2-x1}[/tex]

Given points: (2, 0), (6, -12)

(2, 0) = (x1, y1)

(6, -12) = (x2, y2)

To find the slope, input the two given points into the formula used to find slope:

[tex]\frac{-12-0}{6-2}[/tex]

Simplify:

-12 - 0 = -12

6 - 2 = 4

[tex]\frac{-12}{4} = -\frac{3}{1}=-3[/tex]

The slope of the line is -3.

Hope this helps :)

There are 60 students in the school band. 30% of them are sixth graders, 50% are seventh graders, and the rest are eighth graders. a. How many band members are sixth graders? b. How many band members are seventh graders? c. What percentage of the band members are eighth graders? Explain your reasoning.​

Answers

Answer:

there is 12 6th graders 30 7th graders and 12 8th graders and 20% is 8th graders please mark brainlyist

I NEED AN ANSWER ASAP A surveyor finds the angle of elevation to the top of a building to be 75°. He is 20 meters from the base of the building. How tall is the building?​

Answers

Answer: 74.6

we draw a right triangle ABC, have: ∠ABC = 90°,  AB = 20 and ∠BAC = 75°, the height of the building is BC

we also have: tan 75° = BC/AB = BC/20

=> BC = tan 75°. 20 = 40 + 20√3 ≈ 74.6

Step-by-step explanation:

need help please, ASAP

Answers

Answer:

BC ≅ YX and ∠A ≅ ∠X

Step-by-step explanation:

Answer:

the answer is the last one BC is congruent to yz and a and x

Step-by-step explanation:

I need to find x and y

2x+4y=8
x=3y-6​

Answers

Answer:

(x, y) = (0 , 2)

Step-by-step explanation:

Answer:

use elimination or substitution.

Step-by-step explanation:

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Answers

Answer
hdhddhhskalsk bshshshs

Step-by-step explanatio
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