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3 years ago

Find the size of the angle using Sohcahtoa or Pythagoras.

Mathematics

1 answer:

lisov135 [29]3 years ago

6 0

Answer:

x ≈ 38.7°

Step-by-step explanation:

Using the sine ratio in the right triangle

sinx = $\frac{opposite}{hypotenuse}$ = $\frac{5}{8}$ , then

x = $sin^{-1}$ ( $\frac{5}{8}$ ) ≈ 38.7° ( to 1 dec. place )

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Include parentheses in your answer. (x3 + y3) ÷ (x - y)

-Dominant- [34]

I'm assuming you mean $\frac{x^3+y^3}{x-y}$

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that is simpliest form

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3 years ago

Please Help!!

Genrish500 [490]

Given

$a\sqrt{x+b}+c=d$

we have

$\sqrt{x+b}=\dfrac{d-c}{a}$

Squaring both sides, we have

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And finally

$x=\dfrac{(d-c)^2}{a^2}-b$

Note that, when we square both sides, we have to assume that

$\dfrac{d-c}{a}>0$

because we're assuming that this fraction equals a square root, which is positive.

So, if that fraction is positive you'll actually have roots: choose

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and you'll have

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Which is a valid solution. If, instead, the fraction is negative, you'll have extraneous roots: choose

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and you'll have

$\sqrt{x}+10=4 \iff \sqrt{x}=-6$

Squaring both sides (and here's the mistake!!) you'd have

$x=36$

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3 years ago

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nata0808 [166]

Answer

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Step-by-step explanation:

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Lemur [1.5K]

The correct answer is:

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Explanation:

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7.8 × 10⁷

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3 years ago

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Ivahew [28]

Answer:

Step-by-step explanation:

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3 years ago

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