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4 years ago

Two mechanics worked on a car. The first mechanic charged 105

Mathematics

2 answers:

den301095 [7]4 years ago

8 0

The 105 per hour mechanic worked for 10 hours and the other worked for 15. here's the math.

andrey2020 [161]4 years ago

6 0

The 105 per hour mechanic worked for 10 hours and the other worked for 15.

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(X+4+1)(x+4)=(11+x+1)(x+1) solve for x

Vinvika [58]

Answer:

x= 2

Step-by-step explanation:

so you add the values given in the brackets and leave X as it is (do this on both sides of the equation.

1. (x + 5)(x+4)= (x+12)(x+1)

2. multiply the parenthesis on both sides or one at a time

so, $x^{2}$ +5x+4x+20 = $x^{2}$ +12+1x+12

3. cancel like terms which we have $x^{2}$ so remove that.

5x+4x+20=12+1x+12

4. collect like terms.

9x + 20 = 13x + 12

5. move like terms.

9x-13x=12-20 = -4 = -8

6. x= $\frac{-4}{-8}$ divide both sides by 4 or basically simplify 4 divided by 8

which leaves u with

x= 2

hope this helps x, let me know if u have any questions. photomath is an app that helps too.

5 0

4 years ago

The perimeter of the triangle below is 80 units. Find the length of side PR

serg [7]

Answer:

Step-by-step explanation:

The perimeter is equal to sum of side lengths

4x + z + 3 + 5z - 3 = 80 add like terms

10z = 80 divide both sides by 10

z = 8 PR is 4z so 8*4 = 32

5 0

3 years ago

A group of finance managers at a car dealership estimates thatt 23% of all cars purchased last year were leases.If a sample of 8

vesna_86 [32]

Answer:

p = 0.52392

Step-by-step explanation:

Here we have

p = 23% = 0.23

$\hat p$ = 208/800 = 0.26

n = 800

q = 1-p = 0.77

α = 5% = 0.05

Here we have

Z test given by

$z=\frac{\hat{p}-p}{\sqrt{\frac{pq}{n}}}$

From which we have

From the Cpdf we have Probability = 0.0219, z = 2.016

Therefore from the z score = 0.0683, p = 0.52392 from z table.

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4 years ago

Someone help me please !

kogti [31]

Answer:

(-7, 8)

Step-by-step explanation:

(-7 , 8)

8 0

3 years ago

The approximate value of 5.1 million x 2.2 thousand is? use scientific notation

Sliva [168]

11,220,000,000 is the answer for this question.

7 0

3 years ago

Read 2 more answers