4a + 7b = 38 -> (1)
9a + 7b = 68 -> (2)
Subtract (1) from (2),
9a - 4a + 7b - 7b = 68 - 38
5a = 30
a = 6
Answer:
3.14
Step-by-step explanation:
Answer:
B. 1
Step-by-step explanation:
they only cross at one point... look below
As we are given with

we are supposed to simplify this expression. which can be done as below


Answer:
perimeter = 40 feet
Step-by-step explanation:
side^2 = 100
side = 10
perimeter = 10 x 4 =40