2 years ago

Solve by completing square when a=1 and identify if perfect square trinomial

Mathematics

1 answer:

adelina 88 [10]2 years ago

5 0

Answer:

Step-by-step explanation:

( x² - 2 × 5 × x + 25 ) - 25 + 100 = ( x² - 5 )² + 75

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(2-cos^2A)(1+2cot^2A)=(2+Cot^2A)(2-sin^2A)

fomenos

Answer:

2 sin (2A) cos (2A)^4 + 2cos (2A)

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sin (2A)

Step-by-step explanation:

7 0

3 years ago

What values of k will make the line containing points (k,3) and (-2,1) parallel to the line through (5, K) and (1,0)

rjkz [21]

Answer:

k = -4 or 2

Step-by-step explanation:

For the lines to be parallel, the lines would need to be the same slope. This means to find the slope of each we would take the difference of the rise over the run.

$\frac{1-3}{-2-k}=\frac{-2}{-2-k}$

and

$\frac{0-k}{1-5}=\frac{-k}{-4}$

To find K, set them equal.

$\frac{-2}{-2-k} = \frac{-k}{-4}\\-k(-2-k) = -2*-4\\2k+k^2=8\\k^2+2k-8=0$

Factor the quadratic and solve for K.

$(k+4)(k-2)=0$

k+4=0 so k=-4

k-2=0 so k=2

4 0

3 years ago

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lianna [129]

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8 0

2 years ago

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Francis can buy 7 shirts for $42 or 8 shirts for $48. How much will she pay for nine?

Delvig [45]

Answer:

$54

Step-by-step explanation:

$42/7=6\\48/8=6\\x/9=6\\x=54$

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3 years ago

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Find the Volume <br> If its correct i give 5 stars a like and brainliest

Leya [2.2K]

Answer:

171 in³

Step-by-step explanation:

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2 years ago