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netineya [11]
4 years ago
7

I don't understand!!

Mathematics
1 answer:
Effectus [21]4 years ago
4 0
Love what tines what will give u 54 firdt of all and all up the tickest for tickest toal is adding them all up
You might be interested in
Two mechanics worked on a car. The first mechanic worked for 15
4vir4ik [10]

Answer:

First: $65

Second: $115

Step-by-step explanation:

We write equations for each part of this situation.

<u>The Total Charge</u>

Together they charged 1550. This means 1550 is made up of the first mechanics rate for 15 hours and the second's rate for 5 hours. Lets call the first's rate a, so he charges 15a. The second's let's call b. He charges 5b. We add them together 15a+5b=1550.

<u>The Sum of the Rates</u>

Since the first's rate is a and the second is b, we can write a+b=180 since their sum is 180.

We solve for a and b by substituting one equation into another. Solve for the variable. Then substitute the value into the equation to find the other variable.

For a+b=180, rearrange to b=180-a and substitute into 15a+5b=1550.

15a + 5 (180-a)=1550

15a+900-5a=1550

10a+900-900=1550-900

10a=650

a=$65 was charged by the first mechanic.

We substitute to find the second mechanic's rate.

65+b=180

65-65+b=180-65

b= $115 was charged by the second mechanic

4 0
3 years ago
Solve for x. <br><br> Please help !
Ne4ueva [31]

Answer:

  1. x = 37 1/2
  2. x = 2

Step-by-step explanation:

Parallel lines divide transversals proportionally. I like to write the proportions so the variable is in the numerator. Then the solution is obtained by multiplying by the denominator of the variable term.

1. x/20 = (46 -16)/16

  x = 20(30/16)

  x = 37.5

__

2. (x +4)/13.5 = 4/9

  x +4 = 13.5(4/9) = 6

  x = 6 -4

  x = 2

7 0
3 years ago
28/a + 6 = <br> Plss I need help
dedylja [7]

Answer:

\frac{28 + 6a}{a}

Step-by-step explanation:

6 0
3 years ago
I need this done please help me
levacccp [35]

Answer:

see explanation

Step-by-step explanation:

A

The area (A) of a circle is calculated as

A = πr² ( r is the radius )

Here diameter = 12 , then radius = 12 ÷ 2 = 6 , then

A = π × 6² = 3.14 × 36 = 113.04 m²

B

The circumference (C) of a circle is calculated as

C = 2πr ( r is the radius )

Here C = 28.26 , then

2πr = 28.26 ( divide both sides by 2π )

r = \frac{28.26}{2(3.14)} = \frac{28.26}{6.28} = 4.5 in

3 0
3 years ago
Manuel builds and sells wooden crates. He made this table to show how much his crates cost in dollars. Number of crates 2 4 6 8
taurus [48]
The answer is y-85=10(x-8)
7 0
3 years ago
Read 2 more answers
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