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3 years ago

Please help with this!!! In need of a answer fast!

Mathematics

2 answers:

KiRa [710]3 years ago

7 0

I don’t see the question.

krok68 [10]3 years ago

6 0

Answer:

You never attached anything so ill just say the answer is 4

Step-by-step explanation:

If you want a serious answer please edit your question so it is answerable.

:) Have a good day

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32. Parallelogram ABCD has vertices A(0,0), B(2,4), and C(10,4). Find the coordinates of D.

goblinko [34]

Answer:

The fourth vertex is D(8, 0)

Step-by-step explanation:

Let A(0, 0), B(2, 4), and C(10, 4) be the three vertices of a parallelogram ABCD and let its fourth vertex be D(a, b).

Join AC and BD. Let AC and BD intersect at point O.

We have known that the diagonals of a parallelogram bisect each other.

So, O would be the midpoint of AC as well as that of BD.

$A\left(0,\:0\right)=\left(x_1,\:x_2\:\right)$

$C\left(10,\:4\right)=\left(x_2,\:x_2\:\right)$

The midpoint of AC is:

$\mathrm{Midpoint\:of\:}\left(x_1,\:y_1\right),\:\left(x_2,\:y_2\right):\quad \left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)$

$\left(x_1,\:y_1\right)=\left(0,\:0\right),\:\left(x_2,\:y_2\right)=\left(10,\:4\right)$

$=\left(\frac{10+0}{2},\:\frac{4+0}{2}\right)$

$=\left(5,\:2\right)$

The midpoint of BD is:

$=\left(\frac{a+2}{2},\:\frac{b+4}{2}\right)$

∵ $\frac{a+2}{2}=5$

$a+2=10$

$a=8$

∵ $\frac{b+4}{2}=2$

$b+4=4$

$b=0$

Hence, the fourth vertex is D(8, 0)

4 0

3 years ago

Torri had$20 to buy a birthday persent for her dad she decided to buy a dvd for $18 the sales tax is $7 does she have enogh mone

kondaur [170]

No she does not have enough money

7 0

3 years ago

Suppose a laboratory has a 26-gram sample of polonium-210.The half-life of polonium-210 is about days. a.How many half-lives of

vovangra [49]

Answer:

a) Two half lives, b) $m(276) = 6.526\,g$

Step-by-step explanation:

a) The polonium-210 has a half life of 138.4 days. Therefore, 1.994 half lives have past.

b) Mass decay is described by the following exponential model:

$m(t)=m_{o}\cdot e^{-\frac{t}{\tau} }$

The time constant for the isotope is:

$\tau = \frac{138.4\,days}{\ln 2}$

$\tau = 199.669\,days$

The mass of the isotope after 276 days is:

$m(276) = (26\,g)\cdot e^{-\frac{276\,days}{199.669\,days} }$

$m(276) = 6.526\,g$

7 0

3 years ago

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What is x minus 3 times x plus 2

Marysya12 [62]

Answer:

Your expression would be -2x+2.

5 0

3 years ago

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At thw movies,Aaron buys popcorn for $5.25 and a bottle of water for $2.50. He pays with a $10 dollar bill. How much change shou

4vir4ik [10]

Answer:

5.25 + 2.50 = 7.75. 10 - 7.75 =2.25

Step-by-step explanation:

7 0

4 years ago

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