Answer:
15
Step-by-step explanation:
2x3x15 equals to 90
Add 5 to both sides
n/3-5=12
+5=+5
n/3= 17
*3= *3
n= 51
Answer:

Step-by-step explanation:
Given the area of the base of the oblique pentagonal pyramid is
and the distance from the apex to the center of the pentagon is 6 cm. The measure of ∠ACB is 45°.
we know that
ABC is a right triangle
∠ACB=45°
AC=hypotenuse------> 6 cm





Now, volume of pyramid

Area of the base=50 cm²

so, 

Answer:
60.6 degrees
Step-by-step explanation:
65.2 (average for sep 2013)-4.6=60.6
(C) 1000,
An hour = 60 minutes,
60/4= 15 minutes
The tennis player uses 800 calories, so 800/4 =200 calories
1 hour 15 minutes= 60 minutes + 15 min.
= 800 cal. + 200 cal.
=1000calories