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ludmilkaskok [199]
3 years ago
8

Check whether p=-2 is a solution of the equation 7p-5=20 or not ...​

Mathematics
2 answers:
Lana71 [14]3 years ago
8 0

Answer:

not a solution

Step-by-step explanation:

Substitute p = - 2 into the left side of the equation and if equal to the right side then it is a solution.

7(- 2) - 5 = - 14 - 5 = - 19 ≠ 20

Then p = - 2 is not a solution of the equation

horrorfan [7]3 years ago
8 0

no

Step-by-step explanation:

here, the equation be,

or, 7p-5=20

or, 7×(-2) - 5 = 20

or, -14-5=20

or, -19=20 which is can't be.

so ans is no

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In 90 minutes the population to grow to 700 organisms.

Given that,

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According to the question,

A strand of bacteria has a doubling time of 15 minutes.

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In 30 minutes 40 bacteria for the population to grow.

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In 45 minutes 80 bacteria for the population to grow.

In 60 minutes strand of bacteria has a doubling time the population starts with 80 organisms.

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In 60 minutes 160 bacteria for the population to grow.

In 75 minutes strand of bacteria has a doubling time the population starts with 160 organisms.

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In 75 minutes 320 bacteria for the population to grow.

In 90 minutes strand of bacteria has a doubling time the population starts with 320 organisms.

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In 90 minutes 640 bacteria for the population to grow.

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In 120 minutes 1280 bacteria for the population to grow.

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For more details refer to the link given below.

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