Step-by-step explanation:
For x = 7 or y = f(7)
Graph and solution are in the picture below
8.239 rounded to the nearest tenths = 8.2
Answer:
triple the answer
Step-by-step explanation:
.1×250=25
.3×250= 75
25×3=75
Answer:
x=10
Step-by-step explanation:
The two triangles are similar since each triangle is the same shape of right triangle but different sizes. To find x, write a proportion between two equal ratios of side lengths.

Solve by cross multiplying.
28(3x) = 20(4x+2)
84x = 80x + 40
4x = 40
x=10