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Rufina [12.5K]
3 years ago
5

What are the solutions for x when y is equal to 0 in the quadratic function y= x2 + x - 72?

Mathematics
1 answer:
Ahat [919]3 years ago
3 0
0 = x^2 + x - 72
x^2 + x - 72 = 0
x^2 + 9x - 8x - 72 = 0
X (x + 9) - 8 (x + 9) = 0
(X + 9) (x - 8) = 0

X + 9 = 0
X = -9

X - 8 = 0
X = 8

X (-9,8)

Answer is Option D
x = -9 or x = 8
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2x + 3y = 40<br>5x + 2y = 30​
Andrew [12]

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A) Let's solve for x.  2x + 3y = 40

Step 1: Add -3y to both sides.

2x + 3y + -3y = 40 + -3y

2x = -3y + 40

Step 2: Divide both sides by 2.

\frac{2x}{2} = \frac{-3y + 40}{2}

x = \frac{-3}{2} y + 20

Answer : \frac{-3}{2} y + 20

~~~~~~~~~~~~~~~~~

B) Let's solve for x. 5x + 2y = 30

Step 1: Add -2y to both sides.

5x + 2y + -2y = 30 + -2y

5x = -2y + 30

Step 2: Divide both sides by 5.

\frac{5x}{5} = \frac{-2y + 30}{5}

x = \frac{-2}{5} y + 6

Answer : \frac{-2}{5} y + 6

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Hope this helped you.

Could you maybe give brainliest..?

❀*May*❀

7 0
4 years ago
Read 2 more answers
(I will give brainliest, a thanks, 30 points, and 5 stars if you can answer these 2 questions)
dimulka [17.4K]

Answer:

1. 9 pi, 2. 121 pi

Step-by-step explanation:

The formula for circumference is pi d. So for the first question the radius would be three. The you do pi r ^2 for area so 3 times pi squared. Which is 9 pi. For the second you will do the same thing you will do 22 pi divided by 2 which is 11 pi then you will square 11pi and get 121 pi

4 0
3 years ago
Answer the two questions down below
stira [4]

Answer:

Step-by-step explanation:

a) Reflection over the x axis then a translation directly to the right

b) All the figures are conrguent since only rigid motions were used.

6 0
2 years ago
A mountain climber recorder attitude at the surrounding temperature at various points as she sends a mountain. She then plus the
d1i1m1o1n [39]

A mountain climber recorder attitude at the surrounding temperature at various points as she sends a mountain. She then plus the points on a scatter plot and draws a line of best fit. The equation of the line is why equals -3.6x +59, where x is the altitude and thousands of feet and y is the temperature in degrees Fahrenheit. What does the slope of the equation represent in this scenario?

Answer:

The slope of the equation in this scenario = m = -3.6

Step-by-step explanation:

The equation of a line is expressed as y = mx+b where

m is the slope

b is the y-intercept.

In the above question:

We have Equation

y = -3.6x +59,

Comparing both equations

y = mx+b, y = -3.6x +59

The slope of the equation which is m = -3.6

6 0
3 years ago
Find the missing length of the right triangle when "a" and "b" represent leg length and "c" represents the length of the hypoten
denis23 [38]

Answer:

Step-by-step explanation:

By Pythagoras' Theorem, a² + b² = c².

Substituting the values of a and b, we get:

7² + 25² = c²

49 + 625 = c²

c² = 674

c ≈ 26.0 (to 1 d.p.)

5 0
3 years ago
Read 2 more answers
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