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patriot [66]
3 years ago
12

Find the cosine of ∠J.

Mathematics
1 answer:
scoundrel [369]3 years ago
4 0

Answer:

√2726/94

Step-by-step explanation:

cosJ=\frac{base}{hypotenuse} \\\\cosJ=\frac{KJ}{IJ} \\\\cosJ=\frac{\sqrt{29} }{\sqrt{94} } \\\\cosJ= \frac{\sqrt{29} }{\sqrt{94} } *\frac{\sqrt{94} }{\sqrt{94} } \\\\cosJ=\frac{\sqrt{2726} }{94}

Hope it will help you.

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Answer:

6 weeks

Step-by-step explanation:

You need to write an equation for each.

For Andre, he has 100 dollars, and every week gets 5 dollars more. You add the 5 dollars, and Since you don't know how many weeks it has been, use a variable.

For Elena, she has 10 dollars, and gets 20 each week.

Now that you know that it has been 4 weeks, you can plug in 4 for the variable for weeks.

Andrew:100+5(4)=100+20+120

Elena: 10+20(4)=10+80=90

Andrew has more money in this time.

To find when they have the same amount, equal their expressions to each other. This means that they will have the same amount (because they are equalled) and you can solve to find the variable, which means the weeks that they are equal at.

Bring the like terms to each side by canceling them out. Since you have positive 10, then subtract 10 to each side. You have 5w, so subtract 5w to each side.

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ANSWER:

I believe you wish to calculate the sum of squares total (SST) for this regression analysis. The sum of squares total is 1053.15

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Sums of squares tell if a linear regression of one variable (or variables) on another is good or not.

The squared differences between the observed dependent variable and its mean is a measure of the total variability of the data set.

So the SST is equal to 752.25 + 300.9 = 1053.15

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