MATHEMATICS MIDDLE SCHOOL

a customer returned a bag of cat food he purchased for $5.49 and exchanged it for one that sold for 14.99 the customer gives you a 20.00 bill to pay the difference what is the change​

Answers

Answer 1
Answer:

Answer:

The Answer is: $10.50 in change.

Step-by-step explanation:

The difference in amount is:

$14.99 - $5.49 = $9.50 is the amount owed after the exchange.

$20.00 - $9.50 = $10.50 is the difference in change.

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Four more than seven times a number is the same as twenty less than three times the number

Answers

Let's start by setting up our equations.


Let's call the number "x"


So,

The first part can be represented by

4+7x


And the second part can be represented by

3x-20


Then we just set them equal and solve

4+7x=3x-20\n4+3x=-20\n3x=-24\nx=-8


-8 Is the answer
To write this with numbers,
Four more (this means __+4)
Seven times a number (this means 7x)
Is the same as (this means =)
20 less than (this means __-20)
Three times the number (this means 3x)

Put together, this equation is:
7x + 4 = 3x - 20

A square has sides 10x. Write and simplify an expression for the perimeter of that square.A rectangle has a length of 2x+7 and a width of 3x+8y. Write and simplify an expression for the perimeter of that rectangle.

Answers

perimiter of a square
square has 4 equal sides
so if th legnth of 1 side is x then total perimiter=4x
legnth of side is 10x
therfor perimiter=40x


rectanglepermiter has 2 pairs of sides with same legnth
RP=2L+2W=2(L+W)
L=2x+7
W=3x+8y
so
RP=2(2x+7+3x+8y)
RP=2(5x+8y+7)
RP=10x+16y+14






square=40x
rectangle=10x+16y+14
1. Square:

There are 4  equal sides of a square, so Perimeter = side length * 4

Perimeter expression -  (4)10x 

The perimeter of the square is 40x

2. Rectangle:

There are 4 unequal sides of a rectangle, so Perimeter = 2l + 2w

Length: 2x+7

Width: 3x+8y

Perimeter expression - 2(2x+7) + 2 (3x+8y)

(2x+7) *2 = 4x + 14

(3x+8y) *2 = 6x+16y

(4x +14) + (6x + 16y)

4x+6x +16y+14

The perimeter of the rectangle is 10x + 16y + 14

What is 1 plus 1 minus 96

Answers

i think it's the answer is -94

Answer:

1+1-96

2+(-96)

-94

Step-by-step explanation:

Which expressions would complete this equation so that it has one solution? 4(2x – 3) – 4x =
Chose exactly 2 answers.
A)4x-12
B)3x-4
C)3(2x-6)
D)4(x-5)

Answers

try plugging in the equations
and d are not it because they eliminate x
4x-12=3x-4
x=8
4x-12=6x-18
2x=6
x=3
so both b and c work as answers

Dog purchase line for $8000 in 1995. The value of the land is depreciated by 4% each year there after. Use an exponential function to find the approximate value of the land in 2002.

Answers

The answer to the purchase line is 67

1. How many solutions are there for the equation? x2 + 16 = 8x (Points : 1) 2
1
0

Answers

x^2 + 16 = 8x\n\nx^2-8x+16=0\n\nx^2-4x-4x+16=0\n\nx(x-4)-4(x-4)=0\n\n(x-4)(x-4)=0\n\n(x-4)^2=0\ \ \ \Leftrightarrow\ \ \ x-4=0\ \ \ \Leftrightarrow\ \ \ x=4\n\n Ans.\ One\ solution
Every equation that has an ' x² ' in it has two solutions.

If it's a perfect square, then the solutions are equal, and they look like only 1.

Both solutions to this equation are [ x = 4 ] .
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