Answer:106
Step-by-step explanation:
Let number of white marbles be w
Let number of red marbles be r
w+r = 126---------1
w = 6 +5r-----------2
Put eqn 2 in eqn 1
6+ 5r + r = 126
6 + 6r = 126
6r = 120
r = 20
w = 6 +5r =6+100
= 106
Wouldn't you do 18.20 divide that by .65 & get 28. So the tool was used for 28 minutes
Answer:
Step-by-step explanation:
a^1=-2
a^n=a×a^n-1
C, multiply the powers in the parentheses by 2
