3 years ago

Please help me on this khan academy question choose 3 answers

1 answer:

8 0

The product of a variable and a number should be a variable and a number. I think A, b, and d are the answer because they all comprise of a variable (c, t, j) and a number (11, 1/2, 4). C only provides two numbers and no variable

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The Hoover Dam in the U.S produces 2 x 10 ^9 Watts of electricity and is composed of 7 x 10^9 kg of concrete. Concrete requires

kondaur [170]

Answer:

1) $7 x 10^{15} J$

2) $40.5$ days

Step-by-step explanation:

1) First of all we use $1MJ=1x10^{6}J$ so the total energy will be $7x10^{9} kg * 1x10^{6} \frac{J}{kg} =7x10^{15}J$ .

2)Then we use $1W=1\frac{J}{s}$ and $Time=\frac{7 x 10^{15} J }{2x10^{9}J/s} =3.5x10^{6}s$ or $3.5x10^{6}s*\frac{1h}{3600s}*\frac{1day}{24h} =40.5 days$

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the table the number of cakes an pies that gretchen sold at a bake sale last weekend she sold each cake for $8 an each pie for $

kaheart [24]

Answer:

Step-by-step explanation:

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What is the value of x in this triangle?

Alik [6]

Answer:

D. 33.49

Step-by-step explanation:

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3 years ago

Justin is trying to determine if he has enough money to buy a new video game. The game cost $54.79. He started the day with $210

givi [52]

Answer:

Justin does not have enough money

Step-by-step explanation:

If you subtract 210, 87.35, 42.79, and 25.68 you come up with 54.18 which is less than 54.79 so there fore he does not have enough money to buy the video game

(Brainliest????)

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3 years ago

20 POINTS AND BRAINLIEST!!! Three dentists wanted to compare the ages of their patients. They each calculated their patients’ me

LenKa [72]

Hello,

Looking at the data, you should go with the second and fourth results.

On the second one, Dr. Appiah's M.A.D. is only 9.7 which is less than Dr. Singh's M.A.D. of 14.1

On the fourth one, Dr. Cantwell and Dr. Singh both have a M.A.D. that is only 0.1 from 14, so their ages vary by about the same amount.

Best of luck,
MrEQ

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3 years ago