Answer:

Step-by-step explanation:

Expand parentheses:

Subtract 42 from both sides:

Divide both sides by 14:

Hope this helps!
Answer:
19 x 3 = 57
19 plus 19 plus 19 = 57
19 to the power of 3 squared = 6859
Step-by-step explanation:
Answer:
-7/2 or -3.5
Step-by-step explanation:
h = 20
= h = 35 = h = 70 (2h) (2h)
19h = 35h = 70(2h)(2h)
16h = 70(2h)(2h)
-70 = 20h
-7/2 = h
-3.5 = h
where are the expressions?
Answer:
yes
Step-by-step explanation:
because area of sphere equals =

so if we doubled the radius the surface area will be doubled