2 years ago

Which equations are true for x = –2 and x = 2? Check all that apply.

1 answer:

4 0

А. х²-4=0; х²=4; х=±2, true. B. x²=-4; there is no solution. C. 3x²+12=0; 3x²=-12; x²=-4; there is no solution. D. 4x²=16; x²=4; x=±2, true. E. 2(x-2)²=0; 2(x²-4x+4)=0; 2x²-8x+8=0; x²-4x+4=0; x1=2; x2=2. False. The answer: A, D.

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Find the distance between the points (3, -5) and (-6, -5).

Sophie [7]

ANSWER

EXPLANATION

We want to find the distance between the points (3, -5) and (-6, -5).

The given points have the same y-coordinates .

This means it is a horizontal line.

We use the absolute value method to find the distance between the two points.

We find the absolute value of the distance between the x-values.

The distance between the two points is

|3--6|=|3+6|=|9|=9

8 0

3 years ago

a string was 4m long. she gave 1/4m of it to her sister and 3/4m to her friends. how much string had she given away?

OverLord2011 [107]

The correct answer is: " 1 m " .
____________________________
Explanation:
____________________________
Add up the amounts she had given away:

3/4 m + 1/4 m = 4/4 m = 1 m.
____________________________
The answer is: " 1 m " .
____________________________

6 0

2 years ago

Please help! I’ve been struggling trying to figure out how to start with these two problems.

Vinil7 [7]

Answer:

Step-by-step explanation: