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AysviL [449]
2 years ago
8

Solve: k = -45 ÷ (-15). GIVING BRAINLIST!!!

Mathematics
2 answers:
DerKrebs [107]2 years ago
4 0

Answer: k - 3

Step-by-step explanation:

i just used the rules for division, and removed the parentheses.

k = 45 / 15

once i got to here, i just did simple division. :)

k = 3

Verizon [17]2 years ago
4 0

Answer:

k=3

Step-by-step explanation:

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$3096

Step-by-step explanation:

There are 12 months in 1 year.

3 × 12 = 36

There are 36 months in 3 years.

$86 × 36 = $3096

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3 years ago
Elena is paid a constant rate for each hour she works. The table shows the amounts of money that Elena earned for various amount
Nikolay [14]

Constant rates are used to illustrate linear functions.

  • The average rate of change is $9.0 per hour
  • The function that models the table is: \mathbf{f(x) = 9x }
  • The amount earned in 7.5 hours is $67.5

<u>(a) The average rate of change</u>

This is calculated using:

\mathbf{Rate = \frac{y_2 -y_1}{x_2 -x_1}}

So, we have:

\mathbf{Rate = \frac{31.5-22.50}{3.5 - 2.5}}

\mathbf{Rate = \frac{9}{1.0}}

\mathbf{Rate = 9.0}

Hence, the average rate of change is $9.0 per hour

<u>(b) A function that models the table of values</u>

Let x represent hours, and y represent the earnings.

So, we have:

\mathbf{y =m (x - x_1) + y_1}

Where:

m =Rate = 9.0

So, we have:

\mathbf{y = 9(x - 2.5) + 22.5}

Expand

\mathbf{y = 9x - 22.5 + 22.5}

\mathbf{y = 9x }

Represent as a function

\mathbf{f(x) = 9x }

Hence, the function that models the table is: \mathbf{f(x) = 9x }

<u>(c) Amount earned for 7.5 hours</u>

This means that x = 7.5

So, we have:

\mathbf{f(7.5) = 9 \times 7.5 }

\mathbf{f(7.5) = 67.5}

Hence, the amount earned in 7.5 hours is $67.5

Read more about constant rates at:

brainly.com/question/23184115

4 0
2 years ago
Point M is the midpoint of AB. The coordinates of point A are (-7, 1) and the coordinates of M are (-4,1). What are the coordina
I am Lyosha [343]

Answer:

The coordinates of point B are : (-1, 1)

Step-by-step explanation:

\frac{-7+x^{2} }{2} = -4\\\frac{1+y^{2} }{2} =1 You multiply -4 by 2 which gives you -8 then you multiply 1 by 2 which gives 2.

Then you create the equations -7 + x^{2} = -8\\1 + y^{2} = 2 you substitute -7 for +7 and add 7 to -8 which gives -1 (x^{2}) and subtract 1 from 2 which gives you 1 (y^{2})

To check your answer use the midpoint formula \frac{-7+-1}{2} =\frac{-8}{2} =-4\\\frac{1+1}{2} =\frac{2}{2} =1 which gives you your midpoint (-4,1)

3 0
3 years ago
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