Answer:
x=8
Step-by-step explanation:
Cause 8+1 =9
Answer:
- $52
- this estimate is a little low
Explanation:
a) I might choose 6 1/2 hours and $8 per hour, so the estimated earnings would be ...
6(8) +(1/2)(8) = 52 dollars . . . . estimated earnings
These values are purposely chosen so that one is a little high and the other is a little low, hopefully producing a closer estimate than if both numbers were high (as 7 hours, $8, for example).
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b) Using 800 instead of 790 means the pay estimate is about 1/80 = 1.25% high.
Using 6 1/2 instead of 6 3/4 means the hours estimate is about 1/27 ≈ 3.7% low.
So, we expect the product of these values to be slightly low, perhaps by about 2.5%.
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<em>Comment on estimating</em>
If you can estimate the error in the estimate with some reasonable accuracy, you can use that to adjust the estimate to a pretty close value.
Answer:
19.50
Step-by-step explanation:
32m = 624
m = 19.50
need more words
The answer is D
2x - 3y = 6 multiply this by -3
3x - y = 2 Multiply this by 2
-6x + 9y = -18
6x - 2y = 4 Add the 2 equations:-
7y = -14 so y = -2
Substitute y = -2 in second equation:-
3x - (-2) = 2
3x = 2-2 = 0
x = 0
solution is (0,-2)
Answer:a
Step-by-step explanation:
