Answer:
−6x+10
Step-by-step explanation:
2×−3x+2×5
−6x+2×5
−6x+10
Answer:29.2
Step-by-step explanation:
By plunging 5 into the equation as x, you have the equation
7(5) - 15
7 * 5 = 35 so
35 - 15
f(5) = 20
sara speed is half of Jeanette's so if jeanette ran 7 miles then her walking speed is 3.5MPH and sense she is 7 miles ahed sara is 10.5 miles behind... 3.5MPH which is jeanette speed is double than sara so 3.5/2 is 1.75MPH... Saras walking speed is 1.75MPH


solve for "a", once you get "a", plug it back into either equation to get "b"