Help please help with this question

Mathematics

2 answers:

Ulleksa [173]3 years ago

5 0

First you have to do puthagorean theorm to find the missing leg which is QR then to find sinS you go opposite over hypotenuse. simplify if needed.

siniylev [52]3 years ago

3 0

Sine is opposite/hypotenuse. Opposite of angle S is line QR, which is unknown. Therefore start with the Pythagorean Theorem to find QR. For simplicity, I'll use x as a variable for QR.

 $x^{2}$ +60²=68²
$x^{2}$ =68²-60²
$x^{2}$ =4264-3600
 $x^{2}$ =1024
x= $\sqrt{1024}$
x=32

So QR is 32. Therefore, sin S is 32/68, which simplifies to 8/17.

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Nuetrik [128]

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Step-by-step explanation:

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3 years ago

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LekaFEV [45]

2x+6 = 20
take 6 from both sides
2x = 14
divide by 2 on both sides
x = 7

8 0

2 years ago

3x^2 + 4x = -8 solve using quadratic formula

Firdavs [7]

Use the quadratic equation to solve this (image of the quadratic equation is below)

Remember that quadratic functions are set up like so:

$ax^{2} +bx +c = 0$

To make the equation 3x² + 4x = -8 into a quadratic function you must bring -8 to the left side of the equation so it equals zero. To do this add 8 to both sides

3x² + 4x + 8= -8 + 8

3x² + 4x + 8 = 0

That means that in this equation...

a = 3

b = 4

c = 8

^^^Plug these numbers into the quadratic equation and solve (Keep in mind that +/- is ± )

$\frac{-4+/-\sqrt{(4)^{2}-4(3)(8)}}{2(3)}$