Answer:
r=3 ft
Step-by-step explanation:
it is similarity of two triangles
one
perpendicular side=10 ft
base=10/2=5 ft
second
perpendicular side=10-4=6 ft
Base r=?

First you chang top fractions into decimal add and divide that by 4 which is equal to 0.375 hope it helps.
Answer:
(x + 3)(x + 7)
Step-by-step explanation:
Find two numbers that when added up to , they ALSO have to multiply up to 21. This is simple because of the fact that there is no leading coefficient greater than 1⃣.
A graphing calculator is a great help for problems of this nature.
x ∈ {-5.63, -0.55, 2.59}