MATHEMATICS MIDDLE SCHOOL

write a linear equation in slope intercept form to model the situation: A telephone company charges $28.75 per month plus 10 cents a minute for long distance calls.

Answers

Answer 1
Answer:

Answer:

y=1/10C-23/8x

Step-by-step explanation:

Linear Equation:

Ax+By=C

Slope Intercept Form:

y=mx+b

So, the linear equation is the following;

28.75x+10y=C

Now, to change it into slope intercept form you must get 'y' alone;

28.75x+10y=C

-28.75x         -28.75x            

_________________

10y=C-28.75x                        

10y/10=C/10-28.75x/10

y=1/10C-23/8x

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What is an equation that shows a relationship among certain quantities?

Answers

a mathematical statement that two expressions are equal. SIMPLIFY. to write an expression in a simpler form. FORMULA. An equation that shows a relationship among certain quantities

Work out 2/3 + 3/4?
Work out 5 times 3/4?
PLEASE HELP ASAP!!!

Answers

2/3 + 3/4 

First, we need to find a common denominator.

2*4/3*4 = 8/12

3*3/4*3 = 9/12

Now add the numerators.

9+8 = 17

17/12 = 1 5/12

Answer: 1  5/12

5 * 3/4 = 

5/1 * 3/4 = 15/4

15/4 = 3  3/4

Answer: 3  3/4
2/3 + 3/4
For this, you want to cross multiply
To do this, you do the first numerator (2) multiplied by the second denominator (4), and the first denominator (3) multiplied by the second numerator (3).If you draw lines between the two numbers you are multiplying, a 'cross' is made. Add these two numbers together to make the new numerator. For the denominator, multiply the bottom two numbers.
Next simplify the new fraction (Follow attached  image)

5 x 3/4
This can be written as 5 x 3 / 4
5 x 3 = 15
15/4 = 3 3/4 or 3.75

A shoe box measures 15 in. By 7 in. By 41/2 in. What is the surface area of the box?

Answers

Surface area for a cuboid of length, l, bredth, b and height h.

= 2*(lb + bh + lh)

for 15 by 7 by 4 1/2 =  15 by 7 by 4.5

Surface area = 2*(15*7 + 15*4.5 + 7*4.5)

                        = 2*(105 + 67.5 + 31.5)

                       =2 *(204) = 408

Surface area of box = 408 in²

The function f(x) = 4.50x + 19 relates how much Sean pays to his scout club, f(x), to the number of patches, x, he earns in a month. What is the value and meaning of f(12)?

Answers

f(x)= 4.50 x +19

f(12)= 4.50(12) +19
f(12)= 54 +19
f(12)= 73

What is 3{5[10+5(500-100)+399]} equal to?

Answers

500-100=400
5(400)=2000
399+10=409
2000+409=2409
5(2409)=12045
3(12045)=36135
So it is equal to 36135

Answer:

36,135

Step-by-step explanation:

Okay. Handle 500-100 first. That brings it to 3{5[10+5(400)+399]}. Next, Handle 5(400). That brings you to 3{5{10+2,000+399]}. Then handle all the addition. That leads to 3[5(2,409)]. Next, configure 5(2409). That leads to 3(12045). Then do that one which ends as 36,135 for a final answer.

A soccer team played 160 games and won 65% of them. how many did they win?

Answers

104 because when you multiply 160x65% you get 104.
the answer is 104 because you can do this , 104 divided by 160 equals 0.65. but then move to spaces to the right starting from the decimal and you'll get 65%
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