Multiply: (3x + 7)(5x2 − 3x + 6) a) 15x3 + 26x2 − 39x + 42 b) 15x3 + 26x2 + 3x + 42 c) 15x3 − 44x2 − 3x + 42 d) 15x3 + 26x2 − 3x + 42

Step-by-step explanation:

Multiply

To multiply two parenthesis , we first multiply 3x inside the second parenthesis and then we multiply 7 inside the second parenthesis

Now multiply 7 inside the second parenthesis

Now we add both the answers we got

Lets combine like terms

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17