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Kazeer [188]
4 years ago
15

Please help help help

Mathematics
1 answer:
Jobisdone [24]4 years ago
4 0
Just perform the given functions:(x+7)/x=1+ 7/x
Correct answer is: C

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A sports trainer has monthly costs of $80 for phone service and $40 for his website and advertising. In addition he pays a $15 f
bogdanovich [222]

Answer:

Step-by-step explanation:

The average cost for the training session provided he is a sports trainer can be computed as follows:

Let's assume that;

average cost = C(x)

the no. of session = x

Then:

C(x) = \dfrac{\text{Total cost}}{\text{no. \ of sessions}}

C(x) = \dfrac{\text{80 + 40 + 15x}}{\text{x}}

C(x) = \dfrac{\text{120+ 15x}}{\text{x}}

Now, suppose the trainer wants the average cost C(x) to drop below $16;

Then, we have the following function:

\dfrac{120+15x}{x}\leq C(x)

\dfrac{120+15x}{x}\leq16

By cross multiply:

120 + 15x ≤ 16x

120 ≤ 16x - 15x

120 ≤ x

Therefore, the required no. of session, if the average cost should drop below $16, is 120.

7 0
3 years ago
How does the description of the story's setting in paragraph 2 influence the plot?
ki77a [65]

Answer:

C

Step-by-step explanation:

Bc at the beginning of p2,  it states that something exciting was about to happen.

was <u>ABOUT =  </u> Something is going to happen in the future

Hope that helps!

4 0
3 years ago
Read 2 more answers
The total number of students in rolled at Berkmar middle school is 1400 students the ratio of boys to girls is 3 to 4 for the sc
Anna [14]

Given:

Total number of students = 1400

The ratio of boys to girls is 3 to 4 for the school.

To find:

The number of boys and girls.

Solution:

We have,  Boy : Girls = 3:4.

Let number of boys be 3x and number of girls be 4x.

Total number of students = 1400

3x+4x=1400

7x=1400

Divide both sides by 7.

x=200

Now,

Number of boys =3\times 200=600

Number of girls =4\times 200=800

Therefore, the number of boys is 600 and number of girls is 800 in the Berkmar Middle school.

7 0
3 years ago
How many solutions does this set of equations have 7x − 7y = -6,13x − 9y = 16
QveST [7]

Well they each have 3 solutions

The solutions to 7x-7y=-6 are:

  1. Slope=1
  2. X-intercept= - 6/7=-0.85714
  3. Y-intercept= 6/7= 0.85714

The answers to 13x-9y=16 are:

  1. Slope=2.889/2.000=1.444
  2. X-intercept=16/13=1.23077
  3. Y-intercept=16/-9=1.77778
  4. Hope i could help you
8 0
3 years ago
Which answer choice correctly simplifies the expression Hint: Use distributive property and watch your signs. -4 (x2 - 2xy + 5y2
Sever21 [200]

Answer: -4x^2 + 8xy - 20y^2 + 12

Step-by-step explanation:

-4 (x2 - 2xy + 5y2 - 3)

-4(x^2) = -4x^2

-4(-2xy) = 8xy

-4(5y^2) = -20y^2

-4(-3) = 12

6 0
3 years ago
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