Answer:
Step-by-step explanation:
t=1.5+0.25m, if t=25 then
1.5+0.25m=25
0.25m=23.5
m=94
So she drove 94 miles.
Answer:
4ab(3a² + 2ab − 5b²)
Step-by-step explanation:
simply factorize
Answer:
Situation 2 (B)
Step-by-step explanation:
I think it would be B since the power of the gear increases proportionally with the radius.
The pic is blurry, but looks like 18x²-21x-15
(3x-5)(6x+3) is the factored form.
3 and 6 are the factors of 18
-5, 3 or -3, 5 are the factors of -15
I line them up like this
3 -5
6 3
then I multiple them diagonally: 3*3=9, -5*6=-30, the sum of 9 and -30 is exactly -21, the coefficient for x. (If the sum doesn't make -21, I'd switch -5 and 3, or change to -3 and 5 to try again.)
so the factored form is (3x-5)(6x+3)
