Express (a+3)(a-4) as a trinomial

Answer

Step-by-step explanation:

One way is to ensure that each term in the second bracket is multiplied by each term in the first bracket, as shown below.

(a+3) - (a - 4)

=a(a−4)+3(a−4)

distribute the brackets.

=−+−12

collecting like terms gives.

= − − 12 ← as a trinomial

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

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3