1) Add 1.2 to both sides
7k=21
2) Divide 7 on both sides.
k=3
Your answer is 3.
False
Concentric circles and spheres are those that share the same center. The center of one sphere may be on the circumference of the other while they have the same radius. In that case, they would not be concentric.
Rate for 1 mile is 1.75$+0.75$=2.50$
Jack has 10 $ to spend
when 2.50$ for 1 mile
so 10 $ for 10/2.50=4 mile he can travel
P=6
You minus the 7 from 25 and you get 18 then you divide 18 from 1/3
Since
h(x) = g(f(x)), h'(x) = g'(f(x))×f'(x) (Chain rule).
Setting x=3 we get
h'(3) = g'(f(3))×f'(3)
Plugging in values we get
h'(3) = g'(4)×7
h'(3) = 2×7
h'(3) = 14