ASAP PLS HELP ME WITH THIS

426

Step-by-step explanation:

find area of bottom: 26 x 15 = 390

find area of triangle: 8 x 9 = 72/2 = 36

390 + 36 = 426

It would be 426 ft.

Step-by-step explanation:

First, you find the size of the rectangle and that is 390 ft. Then the area of the triangle which is 9 multiplied by 8 then divided by 2. Last, add the area of the triangle and the rectangle to get you an answer of 426 ft.

21

step-by-step explanation:

"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