Answer:
12.57cm
Step-by-step explanation:
Formula : Pi×r²
pi×2²=4pi=12.56637061
rounded : 12.57cm
Answer:
(x + y)^2 = 45
Step-by-step explanation:
= 40 + 5 = 45
Hiya. I'm going to rewrite the second equation.
By subtracting 5x by both sides, I'll be able to have y by itself:
-y=-5x+13
I'm going to then divide both sides by -1 to get:
y=5x-13.
Then, I'm going to plug that equation into the first equation
3x+2(5x-13)=39
Factor:
3x+10x-26=39
Combine like terms:
13x=65
Divide both sides by 13 to get x by itself to get x=5
Plug this back into the equation of y=5x-13
y=5(5)-13 to get y=12
In the first grid more squares are shaded than in the 2nd grid.
