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Zielflug [23.3K]
3 years ago
15

Justine answered 69 questions correctly on a 150 question test

Mathematics
2 answers:
MArishka [77]3 years ago
4 0

Answer:

I am assuming you are asking for what percent correct she got. She got 46% correct.

Step-by-step explanation:

You divide the answers correct by the total questions. She got 69 out of 150, so dividing that is .46

To turn a decimal into a percentage, just move the decimal two places to the right, thus getting 46 %

If I assumed what you were asking incorrectly, let me know and I'll be happy to help!

alexgriva [62]3 years ago
3 0

Answer:

So he scored a 46 %

Step-by-step explanation:

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A gold mine has two​ elevators, one for equipment and another for the miners. The equipment elevator descends 4 feet per second.
Ad libitum [116K]

Let d_m,\ d_e represent the depth of the miner and equipments elevator, respectively. We know that equipment elevator descends with a velocity of v_e = 4 feet per second, and the miners one descends with a velocity of v_m = 15 feet per second.

If we start counting time (t=0) when the equipment elevator begins to descend, after t seconds its depth will be

d_e(t) = v_et = 4t

On the other hand, the miner elevator follows the same rule, but we have to use its velocity, and remember that it starts with a delay of thirty seconds:

d_m(t) = v_m(t-30) = 15(t - 30)

Now, we have to wait the 30 seconds of delay, and then another 14 seconds. This means that we want to know the positions of both elevators when t = 44. Let's plug this value into the two equations:

d_e(44) = 4\cdot 44 = 176

d_m(44) = 15(44-30) = 15\cdot 14 = 210

So, the equipment elevator is 176 feet deep, and the miner elevator is 210 feet deep, and thus this is the deeper one.

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3 years ago
How do you read a line pointu
snow_tiger [21]
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5 0
2 years ago
What is the definition of a infinitely many solution equation
masya89 [10]

Answer:

Normally infinity means something that never ends, something that has no end, it goes on forever.

Step-by-step explanation:

I don’t actually know if this is right, but in math infinitely means something that goes on forever.

4 0
3 years ago
Read 2 more answers
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ASHA 777 [7]

Answer:

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What is the answer ?
mina [271]

Answer:

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2)x=38

3)x=7

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Step-by-step explanation:

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