7.) Simplify (6 xr)x7

6xrx7

2

Regroup terms.

6x{x}^{7}r6xx7r

3

Use Product Rule: {x}^{a}{x}^{b}={x}^{a+b}xaxb=xa+b.

6{x}^{1+7}r6x1+7r

4

Simplify  1+71+7  to  88.

6{x}^{8}r6x8r

include a picture of the drawing in order for me to

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.