Choose values for A and B and use them to verify the product shown (5a+b)(a-6b) = 5a^2 - 29ab -6b^2

let A and B be 2 and 3

Step-by-step explanation:

then substitute:

(5a+b)(a-6b) = 5a^2 - 29ab - 6b^2

(5×2+3)(2-6×3) = 5×2^2 - 29×2×3 - 6×3^2

13 × (-16) =20-174-54

-208 = -208

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet