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Dimas [21]
3 years ago
14

Help me pleaseeee !!!

Mathematics
2 answers:
lakkis [162]3 years ago
6 0

Answer:

hope it helps you see the attachment

PtichkaEL [24]3 years ago
5 0

Yes, you are correct.

You know that BC=DC (given) and AC=CA (reflexive property).

You just need to know that <ACB≅<ACD.

Then you can prove the two triangle congruent through SAS.

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If a tuning fork vibrates at 120 times per second, how long does it take for 1 vibration?​
SVEN [57.7K]

Answer:

120÷1

Step-by-step explanation:

it would be 120 milla secounds

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3 years ago
The computer store is having a sale on lets us each laptop is being sold for 15% off the regular price Avery wants to buy a lapt
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Answer:

The answer is 600.

Step-by-step explanation:

This is because 5 percent of 800 is 40. 800+40 = 840. 15 percent of 800 is 160. 840 - 160 is 680. 10 percent of 800 is 80. 680 - 80 is 600.

If this is right an you mar me brainliest? Thank you and have a good day!

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In a batch of 280 water purifiers, 12 were found to be defective. What is the probability that a water purifier chosen at random
aleksley [76]
This is experimental probability.

If 12 were found to be defective out of 280 the experimental probability of a purifier being defective is:

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4.3%  (to nearest tenth of a percent)
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Which<br> graph shows a dilation?
a_sh-v [17]

Answer:

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4 0
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What polynomial expressions equal 8x^3+64?
Natali5045456 [20]

Answer:

\displaystyle \boxed{8[x + 2][x^2 - 2x + 4]}

Step-by-step explanation:

Use the Difference of Cubes [(a³ - b³)(a² + 2ab + b²)] to figure this out:

\displaystyle 8x^3 + 64 \\ 8[x^3 + 8] \\ \\ x + 2 = \sqrt[3]{x^3 + 8}

Then, since the divisor\factor is in the form of <em>x - c</em>, use what is called Synthetic Division. Remember, in this formula, −c gives you the OPPOSITE terms of what they really are, so do not forget it. Anyway, here is how it is done:

−2| 1 0 0 8

↓ −2 4 −8

___________

1 −2 4 0 → {x}^{2} - 2x + 4

You start by placing the <em>c</em> in the top left corner, then list all the coefficients of your dividend [x³ + 8]. You bring down the original term closest to <em>c</em> then begin your multiplication. Now depending on what symbol your result is tells you whether the next step is to subtract or add, then you continue this process starting with multiplication all the way up until you reach the end. Now, when the last term is 0, that means you have no remainder. Finally, your quotient is one degree less than your dividend, so that 1 in your quotient can be an x², the −2x follows right behind it, then 4, giving you the other factor of x^2 - 2x + 4, attaching this to the first two factors you started out your work on:

\displaystyle \boxed{8[x + 2][x^2 - 2x + 4]}

I am joyous to assist you anytime.

6 0
3 years ago
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