9.3 times 0.6 =
Plz show work

How do i do this? i don’t understand

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.