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Semmy [17]
3 years ago
14

What are some real life situations using system of equations?

Mathematics
1 answer:
OlgaM077 [116]3 years ago
3 0
Bob's car rental company makes you pay 10 dollars per day you rent the car and a 30 dollar insurance fee

joe's car rental company makes you pay 30 dollars per day you rent the car and a 10 dollar insurance fee

how many days do you need to rent a car for the cost for renting both are the same

bob=10x+30
joe=30x+10
set each to each other
10x+30=30x+10
subtract 10x
30=20x+10
subtract 10
20=20x
divide both sides by 20
1=x
you need to rent 1 day for them to be equal
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Step-by-step explanation:

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Two angles are supplementary. The measure of one angle is 10° more than three times the other. Find the measure of each angle
Marizza181 [45]

The measure of angles are 137.5 degrees and 42.5 degrees

Solution:

Given that two angles are supplementary

Let "a" be the one of supplementary angle

Let "b" be the other supplementary angle

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measure of one angle = 10 + three times the other angle

a = 10 + 3b ---- eqn 1

We know that,

Two Angles are Supplementary when they add up to 180 degrees.

a + b = 180 ---- eqn 2

<em><u>Let us solve eqn 1 and eqn 2 to find values of "a" and "b"</u></em>

Substitute eqn 1 in eqn 2

10 + 3b + b = 180

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4b = 170

<h3>b = 42.5</h3>

From eqn 1,

a = 10 + 3(42.5)

a = 10 + 127.5 = 137.5

<h3>a = 137.5</h3>

Thus the measure of angles are 137.5 degrees and 42.5 degrees

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How do I find the critical points?
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Set our first derivative to zero and solve for x:

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Jane drives 63.84 miles in the morning and 45.9 miles in the afternoon.
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