Answer:
r = -4
Step-by-step explanation:
2r + 7 = - 1
2r = - 1 - 7
2r = - 8
The computation of the index shows that the value of 9 × 10² will be 900.
<h3>How to calculate the indices?</h3>
From the information given, we are told to calculate the value of 9 × 10². This will be calculated thus:
= 9 × 10²
Note that 10² simply means that you've to multiply 10 twice. This will be:
= 10 × 10 = 100
Therefore, 9 × 10² will be:
= 9 × 100
= 900
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Y= 4x
I think that’s the answer
D. 70% because 45/75=0.6 or 60% and 60% doesn't equal to 70%
Hope this helps!!
