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iren [92.7K]
2 years ago
9

Which equations are true for x = –2 and x = 2? Select two options

Mathematics
1 answer:
Rudik [331]2 years ago
3 0

The equations that are true for x = -2 and x = 2 are (a) x^2 - 4 = 0 and (d) 4x^2 = 16

<h3>How to determine the true equations?</h3>

We have:

x = -2 and x = 2

Rewrite as:

x + 2 = 0 and x - 2 = 0

Multiply both equations

(x + 2)(x - 2) = 0

This gives

x^2 - 4 = 0 --- option (a)

Add 4 to both sides

x^2 = 4

Multiply by 4

4x^2 = 16 --- option (d)

Hence, the equations that are true for x = -2 and x = 2 are (a) x^2 - 4 = 0 and (d) 4x^2 = 16

Read more about equations at:

brainly.com/question/2972832

#SPJ1

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ehidna [41]

Lynn mixes 39 pounds of water with 48 pounds of brick dust, so the mixture has a total weight of 39 + 48 = 87 pounds.

13 pounds are spilled during mixing, so she's left with 87 - 13 = 74 pounds to turn into bricks.

7 pounds are needed for 1 brick, so she can make 10 bricks because 7 • 10 = 70 and 7 • 11 = 77, and 70 < 74 < 77.

If she uses the mixture to make 10 bricks, she uses up 70 pounds of it, which leaves 4 pounds to be washed out.

5 0
3 years ago
What is the slope of a line passing through (3, 4) and (5,8)?
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Answer:

2

Step-by-step explanation:

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8 0
2 years ago
1. What is the radius<br> (1 Point)<br> 11 cm
mr_godi [17]

Given that we need to determine the radius of the circle.

<u>Radius:</u>

By definition of radius of circle, the radius is the  length of the line which is drawn from the center of the circle to any point on the circle.

From the figure, we need to determine the radius of the circle.

As, we can see that, the distance from the center of the circle to the point on the circle is 11 cm.

Since, we know that, the radius is the distance from the center of the circle to the point on the circle then, the radius of the given circle is 11 cm

Thus, radius of the circle is 11 cm.

3 0
3 years ago
100 points anwser asap
natita [175]

Answer:

23

Step-by-step explanation:

3 0
3 years ago
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4 If y = 2x + 1, what is X=-3?<br>A 5<br>B - 7<br>C -5<br>D 6<br>​
Hoochie [10]

Answer:

c

Step-by-step explanation:

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USE SUBSTITUTION

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