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3 years ago

If y = 7 when x = 6, find y when x= -21.

Mathematics

1 answer:

AysviL [449]3 years ago

5 0

Answer:

24.5

Step-by-step explan ation:

y=7

x=6

7/6 y/-21

6y=-21x7

6y=-147

y=24.5

brainliest pls thank you!

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Can anyone simplify this??

Natali5045456 [20]

Answer:

$3^{12}$

Step-by-step explanation:

$($ $3^{5}$ $)^{2}$

You multiply the exponents to get:

$3^{10}$

Then you divide it by $3^{-2}$

When dividing exponents, you subtract.

10 - - 2 = 12 so the exponent is 12.

That leaves us with:

$3^{12}$

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3 years ago

Imagine a new pasture with grass growing on it. Every day after the seeds have germinated, the number of blades of grass in the

Arisa [49]

Answer:

It took 17 days for the pasture to be one-third covered in grass

Step-by-step explanation:

* Lets explain how to solve the problem

- The number of blades of grass is triple every day

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∵ The number of blades of grass is triple every day

∴ The next day the number of blades of grass will be 3x

∴ The formula to find the number of blades of grass after d days is

$x(3)^{d}$

- After 18 days, the entire pasture is completely covered in grass

∵ d = 18

∴ The number of blades of grass = $x(3)^{18}$

- We need to know the the number of days that took for the pasture

to be one-third covered in grass

∵ The number of blades of grass for 1/3 covered = $(\frac{1}{3})x(3)^{18}$

∴ $(\frac{1}{3})x(3)^{18}=x(3)^{d}$

- Remember $\frac{1}{3}=3^{-1}$

∴ $3^{-1}x(3)^{18}=x(3)^{d}$

- Remember we add the power of the same bases when we

multiply them

∴ $x(3)^{-1+18}=x(3)^{d}$ ⇒ divide both sides by x

∴ $(3)^{17}=(3)^{d}$

- Remember if the two bases equal in the equation, then their

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∴ d = 17

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3 years ago

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Veronika [31]

They all can be split up to 6 groups because 12+18=30 so each group will have 5 kids in it.

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3 years ago

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jeka57 [31]

Answer:

common denominator is 40

Step-by-step explanation:8x5=40

10x4= 40

3x5=15

3x4=12

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3 years ago

20. What is the volume, in terms of r, for a cylindrical

inysia [295]

Step-by-step explanation:

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3 years ago