Answer:
A.

B. 343 • 7^x
Step-by-step explanation:
if the base of two exponential number is same we add their powers up (only when multiplying)
7^3+7^x ➡7^3+x
the expansion of 7^3 = 343 so 343•7^x is also equivalent to the given expression.
Answer:
keep the sign
Step-by-step explanation:
(+) and (+) = +
(+) and (-) = -
(-) and (-) = -
Ex) -6-6=-12
Answer:
1. y = 2x - 1
Step-by-step explanation:
See attached image.
Answer:
equation: y = 3x + 14
number of coins after 30 months: 104 coins
Hope this helps :)