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3 years ago

Please help me with these questions please I have 12 questions and will reward anyone who helps me with them all this is 11/12

Mathematics

1 answer:

Inessa [10]3 years ago

4 0

N=23

hope thats right

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icang [17]

I think #7 is 40
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3 years ago

Anthony is buying a new skateboard. for $295. The sales tax is 4.75%, what will he pay in tax?

Anon25 [30]

Answer:

$4.75

Step-by-step explanation:

multiply 4.75% by 100 and then add/ move the decimal place 2 times

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3 years ago

Please help ASAP

Alisiya [41]

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3 years ago

Answer this question with a clear explanation to be marked as Brainiest ✨✨✨✨✨✨✨✨

Nina [5.8K]

Answer:

Step-by-step explanation:

A, B and D are all only a few digits long and can be expressed as the ratio of two integers, where at least one is even:

A = -6/16 = -3/8, so it's rational

B = 7.0398 = 35199/5000, so it's rational

D = 6,907 = 13814/2, therefore rational

C, on the other hand is irrational.

If we simplify the surd √8, we get 2√2. The 2's on the top and bottom can now cancel out, giving us √2, which is irrational. [There's a proof but it's kinda long].

5 0

2 years ago

Find the angles between -pi and pi that satisfy:<br><br> (−√3) sin(v)+cos(v)=√3

MAXImum [283]

Observe that

$\sin\left(\dfrac\pi6-v\right)=\sin\dfrac\pi6\cos v-\cos\dfrac\pi6\sin v=\dfrac12\cos v-\dfrac{\sqrt3}2\sin v$

In the original equation, divide both sides by $\dfrac12$ :

$-\sqrt3\sin v+\cos v=\sqrt3\implies\dfrac12\cos v-\dfrac{\sqrt3}2\sin v=\dfrac{\sqrt3}2$

$\implies\sin\left(\dfrac\pi6-v\right)=\dfrac{\sqrt3}2$

Next,

$\sin x=\dfrac{\sqrt3}2\implies x=\dfrac\pi3+2n\pi,x=\dfrac{2\pi}3+2n\pi$

where $n$ is any integer. Then

$\sin\left(\dfrac\pi6-v\right)\implies v=-\dfrac\pi6-2n\pi,v=-\dfrac\pi2-2n\pi$

Fix $n=0$ to ensure $-\pi$ , so that

$v=-\dfrac\pi6,v=-\dfrac\pi2$

3 0

3 years ago