MATHEMATICS MIDDLE SCHOOL

The equation y = 55x + 85 describes the amount of money a plumber charges, where y is the total amount he charges and x is the number of hours he works. The table shows the total amount of money an electrician charges.How much does each charge per hour?

Number of hours worked 1 2 4 7
Total amount charged 115 180 310 505

the plummer charges $___ per hour
the electrician charges $___ per hour

Answers

Answer 1
Answer: If you would like to know how much does each charge per hour, you can calculate this using the following steps:

x ... the number of hours
a plumber: y = 55x + 85 = 55 * 1 + 85 = 55 + 85 = $140 per hour
an electrician: y = $115 per hour

The correct result would be: the plumber charges $140 per hour and the electrician charges $115 per hour.

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Frances used small, medium, and large cups to serve punch. She used 243 medium cups. She used 79 more medium cups than a large cups. She used 56 more small cups than large cups. How many small cups did Frances use to serve punch?

Answers

The required, Frances uses 220 small cups to serve punch.

What are equation models?

The equation model is defined as the model of the given situation in the form of an equation using variables and constants.

Here,
Frances used small, medium, and large cups to serve punch.
Let number of small and large cups be x and y,
According to the question,
She used 79 more medium cups than a large cups.

y = 243 - 79
y = 164


She used 56 more small cups than large cups.
x = 164 + 56

x = 220

Thus, the required, Frances uses 220 small cups to serve punch.

Learn more about models here:
brainly.com/question/22591166
#SPJ2
243 medium cups - 79 = large cups (164)
164 large cups + 56 = small cups (220)
she used 220 small cups.

Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle. She wrote an equation to find the number of drinks she needs to sell to earn $100.1.25x + 1.49 = 100
What error did Barbara make in writing the equation?

Barbara's equation did not consider the number of water drinks.
Barbara's equation did not consider the number of iced tea drinks.
Barbara's equation did not use the correct price for the iced tea drinks.
Barbara's equation did not use the correct total for sales.

Answers

Barbara's equation did not consider the number of iced tea drinks.
The answer is B, Barbara's equation did not consider the number of iced tea drinks. In the equation, Barbara forgot to put a variable in for the number of iced tea drinks and only put in the price.

What are the first five multiples of 9

Answers

Answer: 0, 9, 18, 27, and 36

Step-by-step explanation: To find the first five multiples of 9, multiply 9 by the first 5 whole numbers {0, 1, 2, 3, 4}.

0 x 9 = 0

1 x 9 = 9

2 x 9 = 18

3 x 9 = 27

4 x 9 = 36

So the first five multiples of 9 are 0, 9, 18, 27, and 36.
9*1 = 9
9*2 = 18
9*3 = 27
9*4 = 36
9*5 = 45

The first five multiples of 9 are 9, 18, 27, 36, 45~

How do i find the volume of a composite figure?

Answers

-- Break up the composite figure into pieces
that you know how to find the volume of.

-- Find the volume of each piece.

-- Add up the volumes of all the pieces.

Is 7/20 an equivalent pair to the decimal 0.07?

Answers

no because 7/20 = 0.35 as a decimal 
0.07 and 0.35 are not the same 
No because 7/20 = .035

2ab+6a+12abc factored completely

Answers

2a(b+3+4bc) 
just take out the greatest common factor  :) 
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