Step-by-step explanation:
I am not sure about the answer of (b). Hope it helps :)
Answer:
(B)
Step-by-step explanation:
First, we determine the height of the triangle which we label as y.
Using Pythagoras Theorem.

In the smaller right triangle with hypotenuse, x
Base = 7-3 =4 Units
Height, y= 24 Units
Therefore, applying Pythagoras Theorem.:

Answer:
x<5
Step-by-step explanation:
View Picture
Answer:
4
Step-by-step explanation:
x^3 = 64
4^3 = 64
4×4×4 = 64
Thus, the value of x is 4