Make a system of equations:
0.10x + 0.25y = 3.95
x + y = 23
x + y = 23
Subtract 'y' to both sides:
x = -y + 23
Plug in -y + 23 for 'x' in the first equation:
0.10(-y + 23) + 0.25y = 3.95
Distribute 0.10:
-0.10y + 2.3 + 0.25y = 3.95
Subtract 2.3 to both sides:
-0.10y + 0.25y = 1.65
Combine like terms:
0.15y = 1.65
Divide 0.15 to both sides:
y = 11
Plug this into any of the two equations to find 'x':
x + y = 23
x + 11 = 23
Subtract 11 to both sides:
x = 12
So Sally has 11 dimes and 12 quarters.
Answer:
300ft^3
Step-by-step explanation:
I'm guessing what the question meant be triangular is a triangular prism.
The volume formula for a triangular prism is 1/2(lwh)
L=10
W=10
H=6
(6)(10)(10)=600
600/2=300
V=300ft^3
Hope this helps! :)
Step-by-step explanation:
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Answer:
20% of 30
= 20/100 * 30
= 6
hence 6 students recieved A grade
