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Stella [2.4K]
2 years ago
8

Janelys needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer fo

r 5.75 hours and charged her $168 for parts. The total was $426.75. Write and solve an equation which can be used to determine xx, the cost of the labor per hour.
Mathematics
1 answer:
Sav [38]2 years ago
6 0

Answer: x = 45

Step-by-step explanation:

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Plz help will be marked BRAINLIEST <br> Thanks !
zloy xaker [14]

Answer:

The first two

Step-by-step explanation:

Do the parenthesis of the first and you will get the original equation.

Multiple the second with 4 and you will get the original equation too.

6 0
2 years ago
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There are 12 triangles and 3 squares. What is the simplest ratio of<br> squares to triangles?
grigory [225]
Squares : Triangles
3 : 12
Divide both sides by 3.
The simplest ratio is

1 : 4
4 0
3 years ago
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If a+1/a = 5, find the value of a² +1/a²​
Orlov [11]

a - 1/a =5

take squaring both side

(a - 1/a )^2 = (5)^2

a^2 +1/a^2 -2.a.1/a =25

a^2+1/a^2 -2 =25

a^2+1/a^2 =27 (answer)

6 0
2 years ago
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Use the rule for order of operations to simplify the expression as much as possible.
ratelena [41]

Answer:

The answer to your question is 3

Step-by-step explanation:

Expression

                        3⁴ + 9² / 3³ - 9²

1.- Do the division

                        3⁴ + (9² / 3³) - 9²

Use law of exponents

                        3⁴ + (3⁴ / 3³) - 9²

                        3⁴ + 3⁴⁻³ - 9²

Simplify

                        3⁴ + 3 - 9²

2.- Convert 9² to base 3

                        3⁴ + 3 - 3⁴

3.- Simplify (associative property)

                        ( 3⁴ - 3⁴ ) + 3

4.- Result

                              3

                       

                       

7 0
3 years ago
The post office so 900 steps yesterday 1/4 of the stems were a postcard stamps how many postcard stamps did they sell
Wewaii [24]
900x1/4 or 900x 0.25 =__________
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3 years ago
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