Answer:
170
Step-by-step explanation:
The given relations can be used to write and solve an equation for the number of stickers Peter has.
<h3>Setup</h3>
Let p represent the number of stickers Peter has. That is twice as many as Joe, so Joe has (p/2) stickers. Joe has 40 more stickers than Emily, so the number of stickers Emily has is (p/2 -40).
The total number of stickers is 300:
p +p/2 +(p/2 -40) = 300
<h3>Solution</h3>
2p = 340 . . . . . . . . . . . . . . add 40, collect terms
p = 170 . . . . . . . . . . . divide by 2
Peter has 170 stickers.
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<em>Additional comment</em>
Joe has 170/2 = 85 stickers. Emily has 85-40 = 45 stickers.
We could write three equations in three unknowns. Solving those using substitution would result in substantially the same equation that we have above. Or, such a system of equations could be solved using a calculator's matrix functions, as in the attachment.
p +j +e = 300
p -2j +0e = 0
0p +j -e = 40
Answer:

General Formulas and Concepts:
<u>Algebra II</u>
Step-by-step explanation:
<u>Step 1: Define</u>

<u>Step 2: Solve for </u><em><u>x</u></em>
- Rewrite:

- Define:

- Distribute:

- Subtract 2x on both sides:

- Subtract 15 on both sides:

42% = 0.42
61% = 0.61
1/3 = 0.333
2/7 = 0.286
3/5 = 0.6
so its 2/7, 1/3, 42%, 3/5, 61%
Answer:
2m/s/s
Step-by-step explanation:
It was 0 m/s/s before, and now it is 10 / 5 = 2 m/s/s