Answer:
Step-by-step explanation:
Given a+b=7 and a–b=3, find: 3^a÷3^b
1 answer:
Answer:
27
Step-by-step explanation:
a + b = 7 ....eq 1
a - b = 3 ....eq 2
solve simultaneously using elimination method
add eq 2 to eq 1
a + b = 7
+
a - b = 3
2a = 10
a = 5
substitute the value of a in eq 1
5 + b = 7
subtract 5 from both sides
5 - 5 + b = 7- 5
b = 2
Now, slot in the values of both a and b
3^a÷3^b
we will solve using PEDMAS
3^5 / 3^2
27
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