Question

How to Answer this Math problem?

Pls. Help​

Answer 1

Explanation:

Answer 2

a) Q = 325

b) r = -5 or r = 2

Explanation:

a) √Q/√13 = 5

squaring on both sides

(√Q/√13)^2 = 5^2

Q/13 = 25

Q = 25 × 13

Q = 325

b) √10 - 3r = r

squaring on both sides

(√10 - 3r)^2 = r^2

10 - 3r = r^2

r^2 + 3r - 10 = 0

r^2 + 5r - 2r - 10 = 0

r(r + 5) - 2 (r + 5) = 0

(r + 5) (r - 2) = 0

r = -5 or r = 2