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RideAnS [48]
3 years ago
15

Solve the system of linear equations. y = -2x - 4 y = 2x – 4.

Mathematics
2 answers:
creativ13 [48]3 years ago
6 0

good luck! :D

have a nice day/night

Dahasolnce [82]3 years ago
3 0
Y = -2x -4

Simplifying
y = -2x + -4

Reorder the terms:
y = -4 + -2x

Solving
y = -4 + -2x

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying
y = -4 + -2x
___________________________________
Hope that helps you out :)
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Answer:

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Step-by-step explanation:

4^(x+2)=12

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A bacterial culture starts with 500 bacteria and doubles in size every half-hour.
tekilochka [14]

Answer:

a). 32000

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c). 1259

Step-by-step explanation:

Growth of a bacteria is always exponential. Therefore, population of the bacteria is represented by the the geometric sequence.

Sum of the bacterial population after t hours will be represented by

T_{n}=ar^{n}

Where a = population at the start

r = ratio with the population is growing

n = time or duration of the growth in one hour

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Or gets 4 times after an hour

This sequence will have a common ratio r = 4

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b). After t hours number of bacteria will be represented by

T_{t}=500\times 4^{t}

c). We have to calculate the population after 40 minutes.

That means duration 't' = 40 minutes of \frac{2}{3} hours

By the formula,

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Therefore, number of bacteria after 40 minutes will be 1259.

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Step-by-step explanation:

5(4+8c)

Expand

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Step-by-step explanation:

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