A student on the cross-country team runs 30 minutes a day as a part of her training.
Write an equation to describe the relationship between
the distance she runs in miles, D, and her running
speed, in miles per hour, when she runs at a constant
speed of 5 miles per hour the first 20 minutes, and then
at 4 miles per hour the last 10 minutes

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Abe is a triangle. can you use the sss postulate or the sas postulate to prove triangle abc = triangle aed? by sss only neither apply both apply by sas only

For what values of x is x2 + 2x = 24 true?