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mylen [45]
3 years ago
11

Diane is participating in a 4-day cross-country biking challenge. She biked for 57, 67, and 45 miles on the first three days. Ho

w many miles does she need to bike on the last day so that her average (mean) is 59 miles per day?
Mathematics
1 answer:
ella [17]3 years ago
6 0

Answer:

139

Step-by-step explanation:

57+67+45=169÷3=139

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Which ordered pair is the solution to the system of equations?
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To solve the simultaneous equations given by

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Pluggin x=-9 into Equation 1, we have the value of y,

y=-9-4\\y=-13

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ANSWER: (-9,-13)

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4 0
3 years ago
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Simplify the expression: <br>9a – 7a + 4 – 4 + 8
Ksju [112]

Answer:

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8 0
3 years ago
(5,7) (8,13) find the distance between each pair of point . round to the nearest tenth
Dominik [7]

Answer:

The distance would be 6.7 or 3✓5

Step-by-step explanation:

Im sure there's a faster way to find this, but I'm in 8th grade sooo yeah.

First things first we can use the equation

d=✓(X2-X1)*2+(Y2-Y1)*2

X2= 8

X1= 5

Y2= 13

Y1= 7

From here, you plug in the values and do as followed. You subtract the values to get the answer. For example 8-5 would get us (3)*2.

From here you square the 3 to get 9. You also do the same to the right side of the equation.

Now you have d=✓(3)*2 + (6)*2

From here you square it and you get d=✓9+36

Now we have: d✓45

Now we square the 45 to get 6.7082..., but we round the answer to get 6.7!

Hope this helps! If you have any questions please feel free to ask, as I understand the struggle of math! :)

3 0
3 years ago
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