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3 years ago

I REALLY NEED HELP WITH THIS.

Mathematics

1 answer:

harkovskaia [24]3 years ago

7 0

Answer:

alright so 1 and 2 are equal to each other because there congruent angles. When angkes are congruent to each other or in other words the opposite to each other there equal.

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Simplify (2n + 5) - (3n + 7) + (4n - 9). -3n - 11 3n - 11 -3n + 11 3n + 11

Natasha2012 [34]

Answer:

(B) 3n - 11

Step-by-step explanation:

(2n + 5) - (3n + 7) + (4n - 9) = 2n + 5 - 3n - 7 +4n - 9 = 3n - 11

3 0

3 years ago

S=L (1 - r), for r

maria [59]

OK. Then let's solve for ' r '. That means you have to come up with an equation that says r = everything else.

Step #1:
Write the equation you're given: S = L (1 - r)

Let's divide each side by ' L ': S/L = 1 - r

Subtract 1 from each side : S/L - 1 = -r

Multiply each side by -1 :  1 - S/L = r

and there you have it.

3 0

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

Morgan borrowed $0.35 from her mother every time she went to the gas station to buy some chips. Over the summer Morgan went to t

GarryVolchara [31]

Answer:

The money borrowed by Morgan is $ 3.15.

Step-by-step explanation:

Money borrowed by Morgan to buy chips = $ 0.35

Number of times goes to the station = 9

Money borrowed by Morgan in 9 time visit to station

= 9 x $ 0.35

=$ 3.15

5 0

3 years ago

CAN SOMEONE EXPLAIN HOW I DO THESE PROBLEMS? IM SO CONFUSED AND I HAVE A LOT TO DO PLEASE !!!!!!!

Georgia [21]

Answer:

well your asking a question that needs a graph

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers