Answer: 40 questions
Step-by-step explanation:
set it up as an equation
38/x = 95/100
cross multiply
95x=3800
solve for x
x=40
Answer:
d=6.4m
Step-by-step explanation:
d=2r=2·3.2=6.4m
1. 6
2. -2
3. -7
(I am a bit confused on what you are asking for the "3(-4)" one, so I decided to skip that one.)
4. 4
5. 24
6. -6
Answer:
x = 8, A = 182 units²
Step-by-step explanation:
The perimeter P of a rectangle is calculated as
P = 2l + 2b ( l is the length and b the breadth )
Given P = 66, then
2(7) + 2(3x + 2) = 66 ← distribute and simplify left side
14 + 6x + 4 = 66
6x + 18 = 66 ( subtract 18 from both sides )
6x = 48 ( divide both sides by 6 )
x = 8
Then
3x + 2 = 3(8) + 2 = 24 + 2 = 26, so
A = 7 × 26 = 182 units²
10 - x = d (d= difference of 10 and x)
I think this right, sorry if it's wrong :/