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3 years ago

If d=9, what is 24-d ?

Mathematics

1 answer:

defon3 years ago

3 0

15

Explanation: Plug in 9 into d which gives you 24-9. Making it 15.

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How could I solve y= 2x^2 + 16x - 66 By using quadratic formula?

Slav-nsk [51]

Answer: the solutions are

x = 3 or x = - 11

Step-by-step explanation:

The given quadratic equation is expressed as

y = 2x² + 16x - 66 = 0

The equation is already in the standard form of ax² + bx + c

The general formula for solving quadratic equations is expressed as

x = [- b ± √(b² - 4ac)]/2a

From the equation given,

a = 2

b = 16

c = - 66

Therefore,

x = [- 16 ± √(16² - 4 × 2 × - 66)]/2 × 2

x = [- 16 ± √(256 + 528)]/4

x = [- 16 ± √784]/4

x = (- 16 + 28)/4 or x = (- 16 - 28)/4

x = 12/4 or x = - 44/4

x = 3 or x = - 11

4 0

3 years ago

Read 2 more answers

7/5+2/5x=31/15+7/3x+1/3

valkas [14]

Answer: X= - $\frac{15}{29}$

Step-by-step explanation:

7 0

3 years ago

18. Solve the inequality. Show your work. –6b > 42 or 4b > –4

Nataly [62]

B < -7 or b > -1. If you do not understand how I got this, here is a link.
https://www.symbolab.com/solver/step-by-step/-6b%20%3E%2042%20or%204b%20%3E%20-4

5 0

3 years ago

F(x) = 3x^2+ 4x^2 – 8x - 2 g(x) = 3x - 5 Find (f - g)(x).

sweet [91]

The answer is D. 3x^3+4x^2-11x+3

6 0

3 years ago

Members of the student concil are conducting a fundraiser by selling school calendars. After selling 80 calendars, they had a lo

Oksana_A [137]

Answer:

a) $y=8x-1000$

b) $profit=\$8$

c) They'd have lost $1000 if they had sold no calendars.

Step-by-step explanation:

a) The equation of the line in Slope-Intercept form is:

$y=mx+b$

Where "m" is the slope and "b" is the y-intercept.

In this case we know that "y" represents the profit of loss and "x" the number of calendars sold.

Then, according to the exercise, the line passes through these two points:

$(80,-360)$ and $(200,600)$

Then, we can find the slope of the line with the formula $m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{-360-600}{80-200}=8$

Now, we can substitute the slope and one of those points into $y=mx+b$ and solve for "b":

$600=8(200)+b\\\\b=-1000$

Then, subtituting values, we get that the equation that describes the relation between the profit of loss and the number of calendars sold, is:

$y=8x-1000$

b) The slope of the line is the profit they made from selling each calendar

$profit=8$

c) The y-intercept is the amount they would have lost if they had sold no calendars:

$b=-1000$

They'd have lost $1000 if they had sold no calendars.

6 0

3 years ago