3 years ago

Plshelp me pls yeaaah

Mathematics

1 answer:

xxMikexx [17]3 years ago

7 0

Answer: try it yourself

Step-by-step explanation:

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Lilly paid $19.16 for a 1kg apple basket. This amount includes a tax of 3%. What was the cost of the apple before tax?

stellarik [79]

18.60$
I believe is your answer ...

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3 years ago

A force of 22 pounds presses on a membrane. The average pressure on the membrane is 2.75 pounds per square inch (psi). What is t

Viefleur [7K]

Answer:

8 in^2.

Step-by-step explanation:

F = P * A

22 = 2.75 * A

A = 22/ 2.75

A = 8 in^2.

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3 years ago

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Please help!! I'll mark BRAINLIEST

mixas84 [53]

Answer: C: 2(n+5)

Step-by-step explanation:

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2 years ago

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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,

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

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3 years ago

What multiplies to negative 9 and adds to negative 3

natima [27]

4.8541019662497 + 1.8541019662497 = -3

<span>-4.8541019662497 x 1.8541019662497 = -9</span>

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3 years ago