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Answer:
Option a (110 cubic inches) is the right solution.
Step-by-step explanation:
Given:
Diameter of cylinder,
= 8 inches
Radius,
= 4 inches
Now,
The volume of space will be:
=
=
=
=
=
=
X=mumber of boys
y=number of girls.
I suggest this system of equations:
x+y=30
x=4y
We can solve this system of equations by susbtitution method.
4y+y=30
5y=30
y=30/5=6
x=4y
x=4*6=24
Answer: there are 6 girls
Answer:
15°, 165°, 195°, 345°
Step-by-step explanation:
The reference angle, 15°, is the smallest angle the terminal ray makes with the x-axis. In the first and fourth quadrants, the positive x-axis is the reference line. The angles will be ±15°, or 360°-15° = 345° if you require all angles to be positive.
In the second and third quadrants, the negative x-axis is the reference. That is 180°, so the reference angle will be added to or subtracted from 180° to give 165° or 195°.