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3 years ago

Justin got 83 out of 100 of his questions correct. What is an equivalent ratio. To the amount of questions he got right to wrong

Mathematics

1 answer:

Deffense [45]3 years ago

4 0

Answer:

166:200

Step-by-step explanation:

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5/100 as a decimal in Dollar form

mina [271]

Answer:

$0.05

Step-by-step explanation:

Hope it helps and have a great day =D

5 0

3 years ago

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Find the value of x in this figure

Serjik [45]

Answer:

here question was not clear

4 0

3 years ago

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PLEASE HELP I DO NOT UNDERSTAND AT ALL ITS PRECALC PLEASE SERIOUS ANSWERS

Elina [12.6K]

You want to end up with $A\sin(\omega t+\phi)$ . Expand this using the angle sum identity for sine:

$A\sin(\omega t+\phi)=A\sin(\omega t)\cos\phi+A\cos(\omega t)\sin\phi$

We want this to line up with $2\sin(4\pi t)+5\cos(4\pi t)$ . Right away, we know $\omega=4\pi$ .

We also need to have

$\begin{cases}A\cos\phi=2\\A\sin\phi=5\end{cases}$

Recall that $\sin^2x+\cos^2x=1$ for all $x$ ; this means

$(A\cos\phi)^2+(A\sin\phi)^2=2^2+5^2\implies A^2=29\implies A=\sqrt{29}$

Then

$\begin{cases}\cos\phi=\frac2{\sqrt{29}}\\\sin\phi=\frac5{\sqrt{29}}\end{cases}\implies\tan\phi=\dfrac{\sin\phi}{\cos\phi}=\dfrac52\implies\phi=\tan^{-1}\left(\dfrac52\right)$

So we end up with

$2\sin(4\pi t)+5\cos(4\pi t)=\sqrt{29}\sin\left(4\pi t+\tan^{-1}\left(\dfrac52\right)\right)$

8 0

3 years ago

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Blocks numbered 0-9 are placed in a box and a black is randomly picked the probability of picking an odd prime number is

Andrews [41]

Answer:

Step-by-step explanation:

$B_n = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\B_p = 2, 3, 5, 7\\B_{o_p} = 3, 5, 7\\$

There are 3 odd primes, namely : 3, 5, 7

The total amount of blocks is 9

The odds of picking and odd prime is $\frac{3}{9} \cdot 100\% = 33,(3)\%$

6 0

3 years ago

Find the quotient. ( − 2 ) ÷ 9 − 2 9 18 -18

Airida [17]

Answer:

I don´t know and i don´t want you to get it wrong so i think it is..

Step-by-step explanation:

-18 is probably the answer

Hope this helps!! lol

6 0

3 years ago