Answer:
4^2 + (-7)^2
Step-by-step explanation:
The square of the distance is given by the distance formula as ...
d^2 = (x2 -x1)^2 + (y2 -y1)^2 = (3 -(-1))^2 + (-5-2)^2
= 4^2 +(-7)^2 . . . . . matches the second choice (sort of)
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<em>Comment on notation</em>
Clearly, you understand the use of the caret (^) to signify exponentiation. The number 42 is very different from the value of 4^2 = 16. A caret is required.
Apply the distributive property. − 7 ⋅ 0.6 + 8 d ⋅ 0.6 Multiply − 4.2 + 4.8 d
Answer:
x=8, x=4
Step-by-step explanation:
<u>Add 4 to both sides</u>

<u>Square root</u>
<u />
x - 6 = ±2
x = 8
OR x = 4
So, x=8 or x=4
<u />
His work should have looked like this.
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10 When he added in both sides, he subtracted 10 from 10,
5x = 20 instead of adding 10 from 10 to make 20.
x = 4
2(4) + y = 5
8 + y = 5
y = -3