Select the correct reasons for statements 1 and 3 to complete the proof.

prove: 5x + 9 • x • 3 = 32x

1. 5x + 9 • x • 3 = 5x + 9 • 3 • x 1. ?
2. 5x + 9 • x • 3 = 5x + 27x 2. multiplication
3. 5x + 9 • x • 3 = 32x 3. ?

associative property of addition, addition

associative property of multiplication, addition

commutative property of multiplication, addition

commutative property of multiplication, multiplication

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp