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4 years ago

What does 81% 90% 80% and 34% average into 20 points

Mathematics

1 answer:

Alja [10]4 years ago

7 0

Answer:

71.25%.

Step-by-step explanation:

To find the average, we can simply add up the percentages and divide by how many there are.

We can do this by:

$\frac{81 + 90 + 80 + 34}{4}$ = 71.25%

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Step-by-step explanation:

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Seiji and Gavin both worked hard over the summer. Together they earned a total of $525. Gavin earned $25 more than Seiji. Write

Zepler [3.9K]

Answer:

Part 1) see the explanation

Part 2) The graph in the attached figure

Part 3) The amount earned by Seiji was $250 and the amount earned by Gavin was $275

Step-by-step explanation:

Part 1) Let

s ----> amount earned by Seiji

g ----> amount earned by Gavin

we know that

$s+g=525$ -----> equation A

$g=s+25$ ----> equation B

Part 2) Graph the equations of the system

To graph the lines find out the intercepts

Remember that

The x-intercept is the value of x when the value of y is equal to zero

The y-intercept is the value of y when the value of x is equal to zero

In this problem the s-axis represent the x-axis and the g-axis represent the y-axis

Equation A

Find the s-intercept

For g=0

$s+0=525$ ----> $s=525$

The s-intercept is the point (525,0)

Find the g-intercept

For s=0

$0+g=525$ ----> $g=525$

The g-intercept is the point (0,525)

To graph the line A plot the intercepts and join the points

Equation B

Find the s-intercept

For g=0

$0=s+25$ ----> $s=-25$

The s-intercept is the point (-25,0)

Find the g-intercept

For s=0

$g=0+25$ ----> $g=25$

The g-intercept is the point (0,25)

To graph the line B plot the intercepts and join the points

using a graphing tool

Plot the intercepts both lines and join the points

see the attached figure

Part 3) we know that

The solution of the system of equations is the intersection point both graphs

The solution is the point (250,275)

see the attached figure

therefore

The amount earned by Seiji was $250 and the amount earned by Gavin was $275

3 0

3 years ago