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Leya [2.2K]
4 years ago
5

Solve the system of equations by using subtraction. Y=2x+3 X-y=-2

Mathematics
1 answer:
Firlakuza [10]4 years ago
3 0

Answer:

y = 2x + 3 .... 1

x - y = -2 ...... 2

substitute the value of y in equation 2

x - (2x +3) = -2

x - 2x -3 = -2

-x = - 2 + 3

-x = 1

divide by -1 on both sides

x = -1

substitute the value of x in equation 1

y = 2 (-1) + 3

y = -2 + 3

y = 1

(x ; y)

(-1 ; 1)

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A culture started with 5000 bacteria after 5 hours it grew to 6500 bacteria predict how many bacteria will be present after 16 h
postnew [5]

Answer:

After 16 hours bacterial count will be 11600.

Step-by-step explanation:

Bacterial growth is always an exponential growth in a given culture.So the formula for the growth will be

Final counts of bacteria = Initial counts × (rate of growth)^{time}

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Final counts= 6500 and time of growth = 5 hours

Then we will get the value of rate of growth of bacteria from the bacteria

⇒ 6500 = 5000×(rate)^{5}

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4 years ago
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