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3 years ago

318.8 - 94.63 answer and how to do it

Mathematics

1 answer:

Ivanshal [37]3 years ago

4 0

Answer:

Step-by-step explanation:

Here are three ways to write a subtraction calculation. What do you notice? What do you wonder?

Clare bought a photo for 17 cents and paid with a $5 bill. Look at the previous question. Which way of writing the numbers could Clare use to find the change she should receive? Be prepared to explain how you know.

Find the amount of change that Clare should receive. Show your reasoning, and be prepared to explain how you calculate the difference of 0.17 and 5.

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5. f(-2) = 15, f(1) = 9

KengaRu [80]

Answer:

f(x) = -2x + 11

Step-by-step explanation:

okay so if f(-2) = 15 and f(1) = 9

i used desmos to picture it and i got f(x) = -2x + 11

because f(-2) = -2(-2) + 11 = 4 + 11 = 15 so f(-2) = 15

and f(1) = -2(1) + 11 = -2 + 11 = 9 so f(1) = 9

5 0

3 years ago

10.) Find the exact value of cos⁡(2 sin^(−1)⁡(3/5) ). Do not use a calculator and show your work!

Talja [164]

Double angle identity for cosine:

$\cos\left(2\sin^{-1}\dfrac35\right)=\cos^2\left(\sin^{-1}\dfrac35\right)-\sin^2\left(\sin^{-1}\dfrac35\right)$

By the Pythagorean theorem, if $\sin x=\dfrac35$ , it follows that $\cos x=\dfrac45$ :

$\cos^2x+\sin^2x=1\implies \cos x=\pm\sqrt{1-\sin^2x}$

where we take the positive root because $-\dfrac\pi2\le\sin^{-1}x\le\dfrac\pi2$ , and $\cos x$ is non-negative throughout this domain.

So we have

$\cos^2\left(\sin^{-1}\dfrac35\right)-\sin^2\left(\sin^{-1}\dfrac35\right)=\left(\dfrac45\right)^2-\left(\dfrac35\right)^2=\dfrac7{25}$

3 0

3 years ago

3.4 is 20% of what number?<br> A. 6.8<br> B. 17<br> C. 8.5<br> D. 68

Elenna [48]

Answer:

Step-by-step explanation:

6 0

4 years ago

Help meeeeee!!!!!!!!!

nirvana33 [79]

The answer is C
He will get a sum of two

3 0

3 years ago

Help me out pleaseeee

Alex787 [66]

Answer:

i cant see that well. please take a clear photo ;-;

Step-by-step explanation:

4 0

3 years ago