3 years ago

Please help me with number 8a and b

Mathematics

1 answer:

Advocard [28]3 years ago

5 0

More months there are the less ty owes

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zlopas [31]

Answer:

Step-by-step explanation:

the side is same as 57

what times 3 is 57?

57/3 is 19

AB is 19

pls vote me as brainliest!!!<3

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3 years ago

What amount would yield an interest of $66 in 2 years at 3% p.a.?

yuradex [85]

It would be 12 because you have to solve for the percent

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3 years ago

Find the missing number in this proportion.<br><br> 7 / 35 = ? / 28

Phantasy [73]

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3 years ago

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

A train traveled 1/5 of the distance between two cities in 3/4 of an hour. At this rate, what fraction of the distance between t

lana66690 [7]

Answer:

1/5x=3/4 hour

so since 5 times 1/5=1 then

find x

multiply both sides by 5

x=15/4 hour=3 and 3/4 hour=3 hour and 45 mins

Step-by-step explanation:

Hope this helps :)

Brainlest?

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2 years ago