Answer:
64 miles
Step-by-step explanation:
if you divide 28 by 3.5, this gives you the number of miles per hour, I got 8. Multiply that by 8 because that is the number of hours we are looking for and you get 64. That is the answer.
Answer:
volume = area of rectangle × height
= (x × x ) × 1/2x
= x² × 1/2x
= 1/2x³
the answer is the first option
Answer:
= 22.5°
= 67.5°
Step-by-step explanation:
Let’s create a system of equations for
and
.
Complementary angles are two angles that add up to 90°, so ![f+g=90](https://tex.z-dn.net/?f=f%2Bg%3D90)
Also,
is thrice of g: ![f=3g](https://tex.z-dn.net/?f=f%3D3g)
We can now substitute
in
for
.
![3g + g = 90\\\\4g = 90\\\\g=22.5](https://tex.z-dn.net/?f=3g%20%2B%20g%20%3D%2090%5C%5C%5C%5C4g%20%3D%2090%5C%5C%5C%5Cg%3D22.5)
Now, we can find
by substituting
into either equation.
![f + 22.5 = 90\\\\f = 90-22.5\\\\f = 67.5](https://tex.z-dn.net/?f=f%20%2B%2022.5%20%3D%2090%5C%5C%5C%5Cf%20%3D%2090-22.5%5C%5C%5C%5Cf%20%3D%2067.5)
Hope this helped!
Answer:
3
Step-by-step explanation:
to find the mean you find the average of that set
Semester 1 : 78+91+88+83+94 = 434
434 / 5 = 86.8
Semester 2 : 91+96+80+77+88+85+92 = 609
609 / 7 = 87