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4 years ago

15

I need help once again...it’s timed

1 answer:

choli [55]4 years ago

7 0

to be honest I believe that it is d.25

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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

8y-36 factor the expression completely

kenny6666 [7]

4(2y-9) is your answer factored completely out

4 0

3 years ago

Read 2 more answers

How did the transformation of ()=f of , open x close . equals , x squared to ()=−g of , open x close . equals , x squared , minu

Nikolay [14]

The intercepts are the points where the graph crosses the x or y-axis

<em>The x-intercepts changed from 0 to </em> $\±\sqrt 3$ <em>.</em>
<em>The y-intercepts changed from 0 to 3</em>

The functions are given as:

$f(x) = x^2$

$g(x) = x^2 - 3$

<u>Function f(x)</u>

$f(x) = x^2$

The x-intercept is calculated as follows:

Set f(x) to 0

$x^2 = 0$

Solve for x

$x = 0$

The y-intercept is calculated as follows:

Set x to 0

$f(0) = 0^2$

$f(0) = 0$

Hence, the intercepts are 0

<u>Function g(x)</u>

$g(x) = x^2 - 3$

The x-intercept is calculated as follows:

Set g(x) to 0

$x^2 - 3 = 0$

Solve for x

$x^2 = 3$

$x = \±\sqrt 3$

The y-intercept is calculated as follows:

Set x to 0

$g(x) = x^2 - 3$

$g(0) = 0^2 - 3$

$g(0) = - 3$

The x-intercepts are $\±\sqrt 3$ , while the y-intercept is -3

By comparing the intercepts of f(x) and g(x),

<em>The x-intercepts changed from 0 to </em> $\±\sqrt 3$ <em>.</em>
<em>The y-intercepts changed from 0 to 3</em>

Read more about intercepts at:

brainly.com/question/3334417

5 0

2 years ago

Please answer correctly I am offering brainalist + 10 points for correct answer (:

GrogVix [38]

The answer is B - vertical angles

6 0

3 years ago

Read 2 more answers

NEED HELP ASAP WILL GIVE BRAINLIEST!!! i just need the picture drawn correctly pls before 12pm tmr. offering 100 points and brai

Ivan

Answer:

The opposite of 12 is -12.

Step-by-step explanation:

-12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

All you have to do is do the negative version of that same original number.

8 0

3 years ago