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3 years ago

Halp plz i dont know the answwer

Mathematics

2 answers:

lisabon 2012 [21]3 years ago

4 0

Answer:

-2.1 is the answer im pretty sure

Step-by-step explanation:

Liula [17]3 years ago

3 0

Answer: I believe it is 1/3 or -1.3. or 1. Sorry if its not right.

Step-by-step explanation:

If it's correct you would make 2/5 into 4/10, 4/5 into 8/10. Then subtract 4/10-8/10=0/4 or -0.4. Then subtract (if its 1 then you would add 0.4+1=5 then turn 5 into 10/10 then subtract 10/10-9/10=1.) 0.4-9/10=1/3.

Hope 1 of these answers is right sorry if they aren't!!

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The wavelength of ultraviolet light is about 0.00000003 inches. Which number best approximates this length as a power of 10?

Phantasy [73]

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10 months ago

A man bought a house for 3600 Naira he repairs the house with 150 Naira if he sold the house for 4950 Naira . Find his percentag

kozerog [31]

Step-by-step explanation:

profit%=

$\frac{selling \: price - cost \: price}{cost \: price} \times 100\%$

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2 years ago

Write the polar coordinates (3, pi) in rectangular form. a. (0, 3) c. (-3, 0) b. (3, 0) d. (0, -3)

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3 0

2 years ago

The cake store is having a 25% off sale on all of its cakes.

Shalnov [3]

Answer:

$6.75

Step-by-step explanation:

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4 0

2 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