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3 years ago

13

NEED HELP ASAP!! Use your equation that you got for peak A to find how high Tyler will have to climb to scale the peak. (4 point

s) (2 for correctly substituting values, 2 points for the correct height)

1 answer:

djyliett [7]3 years ago

7 0

Answer:

40 feet

Step-by-step explanation:

x/20=6/3

3x/3=120/3

x=40 feet

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Lucas has 18 coins. there are three times as many pennies as dimes and twice as many nickels as dimes. the number of each coin i

balu736 [363]

18=p+d+n, 3p=d, 2n=d
The lowest number that is divisible by 3&2 is 6 so, there is 6 nickels.
There is 6 nickels and there is half of that in dimes, 3 dimes.
There is three times the amount of pennies of dimes. 3*3=9. There is 9 pennies.
6 nickels + 3 dimes + 9 pennies= 18 coins

3 0

3 years ago

I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

3 years ago

Solve for Y MUST SHOW WORK<br> 2(Y+7) = 28

Verizon [17]

2y+14=28
-14=-14
—————-
2y=14
14/2=y
Y=7

3 0

3 years ago

Read 2 more answers

For part A and B, the options are positive and negative.

ipn [44]

Answer:

Coordinates: (2, -1)

Part A

X coordinate is positive

Y coordinate is negative

Part B

Coordinates after Y-axis reflection: (-2, -1)

X coordiate is negative

Y coordinate is negative

Good luck!

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3 years ago

Read 2 more answers

What’s the solution for x-0= 0

Dominik [7]

I’m pretty sure it’s 0

7 0

2 years ago