Answer:
200000
Step-by-step explanation:
I believe that 200000x7000 = 1400000000 (The answer to the China population equation), therefore should be correct. Hope this helped.
I like to work backwards to see if the common difference is the same.
So I take 16 and work to the left.
So I say 16 - 21 which is -5.
Then I do 21 - 26 which is -5.
Finally, 26 - 31 which is -5.
So what I am doing here is just taking the number that is on the right and subtracting it by the number that appears to the left of it.
Notice that I always get -5 and that has to be because in order for this to have a common difference, the result must always be the same if you are working with the method I used above.
So, our common difference is -5.
You would combine like terms so you add up 3x and the 13x to get 16x + 8y.
Let x is total hours work on first job
y is total hours work on second job
x + y = 20 ; x = 20 - y
8x + 6y = 136
substitute x = 20 - y into 8x + 6y = 136
8x + 6y = 136
8(20 - y) + 6y = 136
160 - 8y + 6y = 136
-2y = -24
y = 12
x = 20 - y
x = 20 - 12
x = 8
answer:
The first job paid $8 per hour, last week you worked 8 hours
The second job paid $6 per hour, last week you worked 12 hours
Double check
x + y = 20
8 + 12 = 20
20 = 20
--------------------
8x + 6y = 136
8(8) + 6(12) = 136
64 + 72 = 136
136 = 136
Answer:
63 feet
Step-by-step explanation:
<u>Let</u> :
<u>Given</u>
<u>Formula for Area</u>
<u>Solving</u>
- (x + 16)(x) = 4977
- x² + 16x = 4977
- x² + 16x - 4977 = 0
- (x - 63)(x + 79)
- x = 63 [because distance is always positive]
<u>The width is</u> : 63 feet