9514 1404 393
Answer:
21. 3x^2 +7x
22. 6x^3 +3x
Step-by-step explanation:
21. The perimeter is the sum of the side lengths.
P = (x^2 +3x +1) +(4x -1) +(2x^2)
P = x^2(1 +2) +x(3 +4) +(1 -1) . . . . combine like terms
P = 3x^2 +7x
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22. The area is the product of the dimensions.
A = (3x)(2x^2 +1)
A = 6x^3 +3x . . . . . use the distributive property
A real world example of a proportional relationship are wages.
Proportional means that Y grows as X grows, and Y shrinks as X shrinks, and when Y is zero, X is zero. The only time they have to be the same number though is at zero.
An example of this in real life is the way that people make money, wages, let's use minimum wage.
When you work 0 hours, you make $0.
Working 1 hour means you made $7.25
and working 5 hours mean you've made $36.25. It's a linear equation that starts at the origin, that means it is proportional.
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Answer:
the answer is 33 use the ratio below
Step-by-step explanation:
22:100
33 :150
Answer:
Segment DE is half the length of segment AC. -- Substitution property of equality
Step-by-step explanation:
Here is given a proof for proving line joining mid segment is parallel and half the length of third side.
Stepwise proof is given in two columns
We find that for every line there is a justification as
STatement Justification
D and E coordinates found out MId point formula
DE and BC are measured Distance formula
DE=1/2 BC Substitution property of equality
This justification was missing in the given proof and with this included proof would be complete
