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kvv77 [185]
3 years ago
15

Please help i give lots of points and branlyest

Mathematics
2 answers:
mestny [16]3 years ago
7 0
Y=85.45+ (63.2(x-1)) I'm not sure if this is correct hopefully it is, sorry if it isn't
Nastasia [14]3 years ago
4 0

Answer:

wt efff im so sorry you have to do this type of stuff-

Step-by-step explanation:

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Solve 2x^2 = 72.<br> Question 1 options:<br> {±18}<br> {±36}<br> {±6}<br> {±8}
Marat540 [252]
All you do is have to plug each option in for x
2*18^2=684
2*36^2=2592
2*6^2=72
2*8^2=128
So it's C.6
7 0
3 years ago
Read 2 more answers
Let u = (1, 2 -2), v= (2, 1, 3) and w = j + 4k. a) Find cos theta, where theta is the angle in degrees between u and w.
vodka [1.7K]

Answer: The value of cos theta is -0.352.

Step-by-step explanation:

Since we have given that

\vec{u}=1\hat{i}+2\hat{j}-2\hat{k}\and\\\\\vec{w}=\hat{j}+4\hat{k}

We need to find the cos theta between u and w.

As we know the formula for angle between two vectors.

\cos\ \theta=\dfrac{\vec{u}.\vec{w}}{\mid u\mid \mid w\mid}

So, it becomes,

\cos \theta=\dfrac{2-8}{\sqrt{1^2+2^2+(-2)^2}\sqrt{1^2+4^2}}\\\\\cos \theta=\dfrac{-6}{\sqrt{17}\sqrt{17}}=\dfrac{-6}{17}=-0.352\\\\\theta=\cos^{-1}(\dfrac{-6}{17})=110.66^\circ

Hence, the value of cos theta is -0.352.

8 0
3 years ago
3 x 2 ?? mark brainlyyyyyy​
skelet666 [1.2K]

Answer:

6

Step-by-step explanation:

Hope it helps kkkkkjjj9

7 0
3 years ago
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Mara earned $25 for two hours of babysitting. How much can she expect to earn for 5 hours of babysitting?
slavikrds [6]

Answer:

62.5

Step-by-step explanation:

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3 years ago
What’s the surface area of a cylinder if radius is 6 and the height is 5
SVETLANKA909090 [29]

Answer:

A≈414.69

Step-by-step explanation:

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3 years ago
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