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3 years ago

Subtract (9x+9)-(8x+8)

Mathematics

1 answer:

san4es73 [151]3 years ago

8 0

Answer:

$= x + 1$

Step-by-step explanation:

$(9x+9)-(8x+8) \\ = 9x + 9 - 8x - 8 \\ = x + 1$

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Simplify the expression: 7y+3x+3-2y+6 Is it 9y+3x+9???

Sonbull [250]

Step 1) Combine like terms/variables.

7y and -2y are similar, combine them.
7+(-2y)=5y

3x has no similar variables, so it stays the same

3 and 6 are similar, without variables, combine them.
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The final answer is 5y+3x+9

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Answer:

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3 years ago

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Step-by-step explanation:

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2 years ago

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Need help fast plz for my pre calc exam

bezimeni [28]

Answer:

h = 8.54 units

Step-by-step explanation:

The Law of Cosines

It relates the length of the sides of a triangle with one of its internal angles.

Let a,b, and c be the length of the sides of a given triangle, and x the included angle between sides a and b, then the following relation applies:

$c^2=a^2+b^2-2ab\cos x$

Since we know the values of all three side lengths, we solve the equation for x:

$\displaystyle \cos x=\frac{a^2+b^2-c^2}{2ab}$

For the triangle ABC in the image, a=10, b=15, c=13, thus:

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Thus, A = 58.67°

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$\displaystyle \sin 58.67^\circ=\frac{h}{10}$

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$h = 10\sin 58.67^\circ$

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Alla [95]

A 48 and for 40 dollars you can buy 5 egg rolls

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