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8090 [49]
3 years ago
13

PLEASE HELP ME~! NEED THIS ASAP

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
8 0

Answer:

B

Step-by-step explanation:

since y and x vary directly the equation relating them is

y = kx ← k is the constant of variation

to find k use any ordered pair from the list given

using x = 4 when y = - 2, then

k = \frac{y}{x} = \frac{-2}{4} = - 0.5 → B


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If 15% of x is 42, what is x?
Blizzard [7]

Answer:

x=280

Step-by-step explanation:

We have, 15% × x = 42

or,

15

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Multiplying both sides by 100 and dividing both sides by 15,

we have x = 42 ×

100

15

x = 280

If you are using a calculator, simply enter 42×100÷15, which will give you the answer.

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Gemiola [76]

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Plz help me get the right answer to these
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3 years ago
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podryga [215]

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6 0
3 years ago
Please help
Firlakuza [10]

Answer:

Step-by-step explanation:

y = -2/3 x       multiply both sides the first equation by 6

6y = -4x                    Add 4x to both sides.

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y = -40/15

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======================

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