Answer:
6
Step-by-step explanation:
A = pi r^2
C = 2 pi r
A = B (area)
3C = B
sub C = 2 pi r into 3C = B, and A = pi r ^ 2 into B
3 (2 pi r) = pi r ^ 2
6 pi r = pi r^2
( divide both sides by pi )
6r = r^2
r^2 - 6r = 0
r(r-6) = 0
r = 0 or r-6 = 0
radius can not be 0 , therefore r = 6
hope this makes sense, might be little confusing sorry!
Answer:
x = 2.5
Step-by-step explanation:
10=2x+5
-5 -5
5 = 2x
----------
2 2
2.5 = x
After you get the equations: 3x + 4y =40 and 5x + 2y =34, use matrices and plug it into the graphing calculator which will give you the answers for x and y.
<span>X is going equal to 4 </span>
<span>and y is going to equal 7 </span>
<span>check: </span>
<span>3(4) + 4(7)= 40 </span>
<span>5(4) + 2(7)= 34
btw... never knew this is college level mathematics ^_^</span>
Nancy bought 354 short sleeve shirts and 177 long sleeve shirts.
Step-by-step explanation:
Given,
x represents the number of long sleeve shirts
y represents the number of short sleeve shirts
According to given statement;
x+y=531 Eqn 1
x = 2y Eqn 2
Putting value of x from Eqn 2 in Eqn 1
Dividing both sides by 3
Putting y=177 in Eqn 2
Nancy bought 354 short sleeve shirts and 177 long sleeve shirts.
Keywords: linear equation, substitution method
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If it takes an hour to fill 1 tank in 1 hour 1 tank will be full