<u><em>Answer:</em></u>
70
<u><em>Explanation:</em></u>
Assume that the number we are looking for is x
one tenth is interpreted into 
Now, we know that one tenth of the number is 7, this means that:
* x = 7
Solve for x by multiplying both sides of the equation by 10, we get:
* x * 10 = 7 * 10
x = 70
Hope this helps :)
Answer:
3 x-intercepts
Step-by-step explanation:
f(x) = x⁴ - 5x²
Go to where 30 degrees is on the unit circle and find the y-coordinate. That is sin30.
Answer: 
Work Shown:

This can be rewritten into 