3 years ago

Which statement about quadrilaterals is true?

Mathematics

2 answers:

galina1969 [7]3 years ago

8 0

(D)All rhombuses are quadrilaterals (Always).

muminat3 years ago

5 0

The answer is D: all rhombuses are always quadrilaterals

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Given the endpoint A(1, 3) and the midpoint C(6, 2), find the other endpoint B(x, y).

Tpy6a [65]

Right away we know we don't have fractions; the midpoint is the average of the coordinates, so if it and one endpoint are integers so is the other endpoint.

We can do a kind of point arithmetic:

C = (A+B)/2

2C = A+B

B = 2C - A

B = 2(6,1) - (1,3) = (12,2)-(1,3)=(11,-1)

Answer: That's none of the above, but a typo away from the first choice.

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Hitman42 [59]

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Simplify the following expression. 7^-5/6.7^-7/6. 1/49 1/14 14 49

Serggg [28]

${7}^{ - \frac{5}{6} } \times {7}^{ - \frac{7}{6} } \\ = {7}^{ - \frac{5}{6} - \frac{7}{6} } \\ = {7}^{ - \frac{12}{6} } \\ = {7}^{ - 2} \\ = \frac{1}{ {7}^{2} } \\ = \frac{1}{49}$
The answer is 1/49

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3 years ago

If you choose one card from a standard deck, what is the probability that the card is either red or a king?

kherson [118]

$|\Omega|=52\\ |A|=\underbrace{26}_{\text{red}}+\underbrace{4}_{\text{king}}-\underbrace{2}_{\text{red king}}=28\\\\ P(A)=\dfrac{28}{52}=\dfrac{7}{13}\approx54\%$

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3 years ago

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The interior angles of a triangle have measures (2x - 5), (4– 1), and 30°

const2013 [10]

Answer: x=26

Step-by-step explanation:

1. Write the equation 2x-5+4x-1+30=180 because all triangle angles add up to 180°

2. Simplify the equation by combining like terms. Write the equation as 6x+24=180

3. Subtract 24 from both sides. Write the equation as 6x=156.

4. Divide 156/6 and get 26. That is your answer (x=26).

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3 years ago