Answer:
4.05
Step-by-step explanation:

multiply the following
add the sum (3.5+0.55)
you'll get 4.05
Answer:
5
Step-by-step explanation:
(13^2 - 12^2) ÷ 5
(169 - 144) ÷ 5
25 ÷ 5
5
You do the square root of 75
and then with that number you divide it by 5
and that is your answer
Expand
simplify x - 5x + 35 to -4x + 35
subtract 35 from both sides
simplify -7 - 35 to -42
divide both sides by -4
two negatives make a positive
simplify 42/4 to 21/2
Answer: x = 21/2.