3 years ago

In math, how to find x?

1 answer:

6 0

You have to isolate the variable x, meaning you have to push all the other coefficents and variables to the other side and then solve for x.

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What is the discriminant of the quadratic equation -x^2-x-8=0?

Nat2105 [25]

Answer:

-31

Step-by-step explanation:

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3 years ago

Find the exact values of cos (3pi/4radians) and sin (3pi/4 Radians)

ryzh [129]

$\cos\dfrac{3\pi}{4}=\cos\left(\pi-\dfrac{\pi}{4}\right)=-\cos\dfrac{\pi}{4}=-\dfrac{\sqrt2}{2}$

$\sin\dfrac{3\pi}{4}=\sin\left(\pi-\dfrac{\pi}{4}\right)=\sin\dfrac{\pi}{4}=\dfrac{\sqrt2}{3}$

Look at the picture.

$\dfrac{\pi}{2} < \dfrac{3\pi}{4} < \pi\\\\therefoere\\\\\cos\dfrac{3\pi}{4} < 0\ and\ \sin\dfrac{3\pi}{4} > 0$

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3 years ago

Describe how adding and subtracting mixed numbers can help you with recipes.

anygoal [31]

Say you're making a recipe that needs 2 1/2 cups of water. But you want to make two servings, so you need to know what 2 1/2 + 2 1/2 equals. Or maybe you need a half cup of milk but you don't have enough. You need to know how much left you need so you can buy or borrow the right amount.

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3 years ago

Read 2 more answers

36,000 people attended a basketball game. If 80% of the seats are filled, how many seats are in the ballpark?

jeyben [28]

Answer:

The answer is 45,000

Step-by-step explanation:

I hope this helps

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3 years ago

Round 0.0645 g to 2 significant figures: ___ g<br> 0.064 <br> 0.06 <br> 0.065 <br> 0.1