3 years ago

Is the expression 3(x+1 1/2)-3equivalent to 3x+1 1/2

1 answer:

8 0

No because you are distributing and for 3(x+11/2), you multiply 3 times x is 3x and then 3 times 11/2 is 16 1/2 . All together 3x+16 1/2 or 16.5

It is not equal to 3x+11/2.

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Simplify the expressions<br> (a^2b^-3/a^-2b^2)^2

poizon [28]

Answer:

$(\frac{a^{2}b^{-3} }{a^{-2}b^{2} })^{2} = (a^{2-(-2) }b^{-3 - 2})^{2} \\ = (a^{4}b^{-5} )^{2} = (a^{4})^{2} (b^{-5})^{2} = a^{8} b^{-10}$

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Step-by-step explanation:

6 0

3 years ago

A box containing 90 tiles weighs 23.4 lbs. How much would 15 tiles weigh?

andrew-mc [135]

Answer:

3.9

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15 X 23.4= 351

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7 0

3 years ago

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Dovator [93]

Answer:

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Step-by-step explanation:

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3 years ago

For this right triangle, what is the cosine of angle C?

ollegr [7]

Answer:

A cos C = 12/13

Step-by-step explanation:

cos theta = adjacent side/ hypotenuse

cos C = BC/AC

But we don't know BC, but we can find it using the Pythagorean theorem

a^2 +b^2 = c^2

5^2 +BC^2 = 13^2

25 + BC ^2 =169

Subtract 25 from each side

BC^2 = 169-25

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Taking the square root of each side

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3 0

3 years ago

What is the solution to the system of equations for y= -2x - 4 and y= 2x + 4

MaRussiya [10]

Y = -2x - 4

y = 2x +4

add the two equation

2y = 0 , y =0

2x + 4 = 0

2x = -4

x = -2

4 0

4 years ago

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