Here's how to find out:
Take the equation: d/0.2 = 3d + 2.1
Multiply each side by 0.2 : d = 0.6d + 0.42
Subtract 0.6d from each side: 0.4d = 0.42
Divide each side by 0.4 : d = 1.05
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This answer has been changed.
I got d = -0.75 the first time.
Then I came back and changed it.
It's correct now. d = 1.05
4^1 * 4^2 = 4^(1 + 2) = 4^3 = 64
5^3 * 5^-6 = 5^(3 - 6) = 5^-3 = 1/125
The third one down is rather sneaky. It's also kinda neat.
31 = 32 - 1 = 2^5 - 1
32 * 31
= 32 (2^5 - 1)
= 2^5(2^5 - 1)
= 2^10 - 2^5
= 1024 - 32
= 992
I don't see any math tricks to solve this. Use brute force.
6^5 * 5^-7 = 6^5 / 5^7 = 7776 / 17125 = 0.00953
2. Just pick a couple of questions out of the four above. The last one is a good example for division. The first one would be good for multiplication. I've explained all you need.
Answer:88
Step-by-step explanation:
Answer:
5
Explanation:
Look at the number line and count the number of increments needed to get from point A to B.
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