12*13=156 hope this helped
Let 's x the length of the pyramid:
V=x²*h/3
V=1024 and h=12
So x²*12/3=1024
==>x²=1024*3/12
==>x²=256
==>x²=16²
==> x=16 for (x=-16 must be exclude <0)
......brainpower pts pls
Answer:
You are asked for an angle. You need to use the inverse sine.
The answer is about 30 degrees. See below.
Step-by-step explanation:
Sin(y) = opposite / hypotenuse
opposite = 9cm
hypotenuse = 17 cm
Sin(y) = 9/17
y = sin-1(9/17)
y = sin-1(31.97) degrees.
To the nearest 1/10 of a degree, it would be
y = 32.0 degrees.
Answer:
number 1 is C number 2 is A and number 3 is D
Step-by-step explanation:
Answer:
11
Step-by-step explanation:
First, write an equation to represent the situation.
34 = 2a + 12
This equation works because your combined age is half of 68, so 34. If your age is a, then yours sister's age is a + 12. if you add your age to your sister's, you get 2a + 12.
Now just solve for a.
34 = 2a + 12
First, subtract 12 from both sides.
22 = 2a
Then divide both sides by 2.
11 = a
So you are 11 years old. If you need to check your work, your age (11) plus your sister's age (11 + 12, which is 23) is 34, which is half of your grandfather's age.
