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RoseWind [281]
3 years ago
9

The cost of a service call to fix a washing machine can be expressed by the linear function y = 45 x + 35, where y represents th

e total cost and x represents the number of hours it takes to fix the machine. What does the y-intercept represent? the cost for each hour it takes to repair the machine the service fee for coming to look at the machine the total cost for fixing the washing machine the amount of time that it takes to arrive at the home to make the repairs
Mathematics
2 answers:
8090 [49]3 years ago
7 0

The y-intercept is where the line starts on a graph. The y-intercept is 35.

This number doesn't change ever in the linear expression.

"45x" represents the slope of the line and "the number of hours it takes to fix the machine." y represents the total cost.

35 is the only value that doesn't get altered in the expression because its by it self.

The first option doesn't make much sense because it represents "45x" not the y-intercept.

The second option makes sense because the cost for looking at the machine doesn't change which represents the starting amount.

The third option doesn't make much sense because the total cost to fix the machine is represented by "y" in the original expression. It even says so in the question, "where y represents the total cost."

The fourth option doesn't make much sense because it has nothing to do with the actual problem it self.

Therefore, the only logical answer is "the service fee for coming to look at the machine."

Best of Luck!

Effectus [21]3 years ago
5 0

Answer:

B. The service fee for coming to look at the machine

Step-by-step explanation:

Whenever we have a linear equation like this in real-world problems, the y-intercept always represents a fixed cost of some sort.

Here, 35 is the y-intercept. It cannot represent "the cost for each hour it takes to repair the machine" because that's what 45 means.

It cannot represent "the total cost for fixing the washing machine" because that's what y means.

And it cannot represent "the amount of time that it takes to arrive at the home to make the repairs" because that's what x means.

Thus, 35 must be the service fee. This is the upfront fee that is fixed and doesn't change depending on time.

Hope this helps!

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Which is the value of this expression when a = 5 and k = negative 2?
LuckyWell [14K]

Answer:

<h2>25/9</h2>

Step-by-step explanation:

hello :

this expression equivalent to : (3/a)^5

because ;3²a^(-2)/3a^(-1)= (3²/3)×(a^(-2)/a^(-1)) = 3a^(-2+1) = 3a^(-1) = 3/a

now : a=5 and k= -2    so :    (3/5)^(-2) = (5/3)² =25/9

6 0
2 years ago
Plz Um can someone Please help me I really need help with this
photoshop1234 [79]

You seemed to have asked this multiple times. I have answered one of yours. Its D.

5 0
2 years ago
A function is described by the equation f(x) = 2x + 3. The replacement set for the independent variable is (2,4,6,8). Which set
Anna11 [10]
<h3>Answer:  {7, 11, 15, 19}</h3>

Write the values in the order shown. The curly braces indicate a set.

=================================================

Explanation:

The replacement set for the independent variable is {2,4,6,8}

This means we'll plug x = 2, x = 4, x = 6, and x = 8 into the function one at a time to find the corresponding y = f(x) value.

---------

Plug in x = 2 to find that,

f(x) = 2x+3

f(2) = 2*2+3 ... replace every x with 2

f(2) = 4+3

f(2) = 7

If the input is x = 2, then the output is y = 7. Therefore, the '2' in the domain corresponds to '7' in the range.

If you repeat those steps for x = 4, then you should find that f(4) = 11. Do the same thing for x = 6 and it should lead to y = 15. The last value in the range is y = 19 which corresponds to x = 8.

In short, the domain {2,4,6,8} corresponds to the range {7, 11, 15, 19}

Usually with sets, order doesn't matter. However, in this case, the order is important because we need to match the 2 with the 7, the 4 with the 11, etc.

6 0
2 years ago
Find the surface area. round to the nearest hundredth when necessary.
Dmitry_Shevchenko [17]

Answer:

The surface area of the cuboid is 648 m^2

Step-by-step explanation:

What we have here is cuboidal in outlook

By using the formula for the surface area of a cuboid, we can get the surface area of the shape

mathematically, we have the surface area of a cuboid as follows;

2(lb + lh + bh)

where l is the length, b is the breadth (width) and h is the height

We can have the length as 9 m, the width as 9 m and the height as 13.5 m

Substituting these values, we have the surface area of the cuboid as;

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A= 2(324)

A = 648 m^2

8 0
3 years ago
Help this is really hard
scoundrel [369]

Answer:

x = 18, y = 45

Step-by-step explanation:

4x - 7 + a = 180 (linear pair)

But, a = 6x + 7 (alternate interior angles)

=> 4x - 7 + 6x + 7 = 180

=> 10x = 180

=> x = 18

Now, 3y - 20 = 6x + 7 (vertically opposite angles)

=> 3y - 20 = 6(18) + 7

=> 3y = 108 + 7 + 20

=> 3y = 135

=> y = 45

Hope it helps :)

Please mark my answer as the brainliest

4 0
2 years ago
Read 2 more answers
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