Elevator 1 moved up 12 feet from the ground level. Its position is labeled as +12. Elevator 2 moved down 7 feet from the ground level. Its position is labeled as . (Use the hyphen for negative such as -1

-7

Step-by-step explanation:

If elevator 1 moved up 12 and is now labelled +12, that means we can say that elevator 1 went in the "positive" direction.

Meanwhile, elevator 2 moved down, which is the opposite of up. That means we can say that elevator 2 is moving in the "negative" direction. So since it moved down 7, we can say that it is now at the position labelled "negative 7", which is denoted by -7.

Hope this helps!

step-by-step explanation:

it's 15

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629