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Ulleksa [173]
3 years ago
10

-(-2)^2I can't do it because it confuses me​

Mathematics
1 answer:
Vlad1618 [11]3 years ago
4 0

Answer:

-4

Step-by-step explanation:

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Is the following expression true or false? [x^2 + 8x + 16] · [x^2 – 8x + 16] = (x2 – 16)^2
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(x^{2} +8x+16)(x^{2} -8x+16)\\(x+4)^{2} (x-4)^{2} \\(x^{2}-16)^{2} \\

it is true; just work them out, you should get what they got :))

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Evaluate 3x – 4 when x=7. The value of the expression is​
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Essential Question
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First, make a list of the possible outcomes for each flip. Next, count the number of the possible outcomes for each flip. There are two outcomes for each flip of a coin: heads or tails.

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What is the value of this expression when a= - 3 and b=-2?<br> (3a^-2b^6/2a^-1b^5)^2
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7 0
2 years ago
A van starts off 191 miles directly north from the city of Morristown. It travels due east at a speed of 25 miles per hour. Afte
coldgirl [10]

Answer:

Distance between the van and Morristown is changing at the rate of 13.22 miles per hour.

Step-by-step explanation:

From the figure attached,

Van starts from C (City of Morristown), reaches the point A 191 miles due North and then it travels with a speed of 25 miles per hour due East from A towards B.

We have to calculate the rate of change of distance BC, when the van reaches point B which is 119 miles away from A.

By Pythagoras theorem in the triangle ABC,

BC^{2}=AB^{2}+AC^{2}

Distance AC is constant equal to 191 mi.

By differentiating the equation with respect to time 't'

2BC.\frac{d(BC)}{dt}=0+2AB.\frac{d(AB)}{dt}

BC.\frac{d(BC)}{dt}=AB.\frac{d(AB)}{dt}

Since BC² = (119)²+ (191)²

BC = √50642 = 225.04 miles

From the differential equation,

(225.03).\frac{d(BC)}{dt}=119\times 25 [Since \frac{d(AB)}{dt}=25 miles per hour]

\frac{d(BC)}{dt}=13.22 miles per hour

Therefore, distance between the van and Morristown is changing at the rate of 13.22 miles per hour.

4 0
3 years ago
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