The four-digit numeral 3AA1 is divisible by 9. What digit does A represent?
1 answer:
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Answer:
98
Step-by-step explanation:
So we have the expression:
And we want to evaluate it when x is 3 and y is 8.
So, substitute:
Multiply:
Add:
And we're done!
Answer:
y = 5x + 4
Step-by-step explanation:
5x - y = -4
5x - 5x - y = -4 - 5x
-y = -5x -4
y = 5x + 4
So:
Let us simply the parenthesis first.
So we have
We can rearrange the terms and get:
Which is equal to
So now we have to complete it by multiplying it all by 1/4 which is basically dividing it by 4.
So:
Simplifying that, we get:
And reducing that farther we finally get:
Which is your final answer :)
Let us simply the parenthesis first.
So we have
We can rearrange the terms and get:
Which is equal to
So now we have to complete it by multiplying it all by 1/4 which is basically dividing it by 4.
So:
Simplifying that, we get:
And reducing that farther we finally get:
Which is your final answer :)