Answer:
correct 42 in bsae 10 is 60
13) E
14) B
15) D
16) F
17) A
18) C
12
Step-by-step explanation:
Equation y=40x+420
plur in 900 to the y
900=40x+420
subtract
480=40x
divide
x=12
3
Using the rule of exponents
÷ = , then
÷ = = 12³