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nata0808 [166]
2 years ago
15

30% of middle school kids are walkers. If there are 120 middle school kids how many of them are walkers.

Mathematics
2 answers:
umka21 [38]2 years ago
6 0
That means 36 students are walkers
kobusy [5.1K]2 years ago
4 0
30\100=x\120
6\20=x\120
36\120=x\120
So x=36 walkers
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1) In one month a furniture store sold 630 plastic chairs, 273 wooden chairs and 286 metal chairs.
Brrunno [24]

Answer:

1,183

Step-by-step explanation:

first you do 630 and add 273 you should get 903 then add 286 to that and you get 1,183

3 0
3 years ago
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.........................................................................................................
erastova [34]

Answer:

I have no clue... I'm very sorry...

Step-by-step explanation:

4 0
2 years ago
Find the value of x and explain how you got the answer
pashok25 [27]
5x + 3 = 38 
5x = 38-3 
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8 0
3 years ago
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What is a simple way to solve for the sum and difference of 2 cubes? For example, 27+64<img src="https://tex.z-dn.net/?f=x%5E3"
salantis [7]

Answer:

(3 + 4x)(9 - 12x + 16x²) = 0

(4m - 1)(16m² + 4m + 1) = 0

Step-by-step explanation:

Here we have to solve the sum of two cubes which is 27 + 64x^{3}

Now, the equation is 27 + 64x^{3} = 0

⇒ 3³ + (4x)³ = 0

⇒ (3 + 4x)[3² - 3(4x) + (4x)²] = 0

⇒ (3 + 4x)(9 - 12x + 16x²) = 0

So, (3 + 4x) = 0 or (9 - 12x + 16x²) = 0

Therefore, from the above two relation we can solve for x.

One root will be - \frac{3}{4} and the others we will get by applying Sridhar Acharya Formula, which will give a pair of conjugate imaginary roots of the equation.  

Again, we have to solve the difference of two cubes which is 64m^{3} - 1

Now, the equation is 64m^{3} - 1 = 0

⇒ (4m)³ - 1³ = 0

⇒ (4m - 1)[(4m)² + 4m(1) + 1²] = 0

⇒ (4m - 1)(16m² + 4m + 1) = 0

So, (4m - 1) = 0 or (16m² + 4m + 1) = 0

Therefore, from the above two relation we can solve for m.

One root will be \frac{1}{4} and the others we will get by applying Sridhar Acharya Formula, which will give a pair of conjugate imaginary roots of the equation.  (Answer)

8 0
3 years ago
A newborn baby had about 26,000,000,000 cells. An adult has about 4.94 times 10 to the 13 power cells. How many times as many ce
Tom [10]
2.6 • 10^10 = 26,000,000,000
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49,400,000,000,000/26,000,000,000= 1900

And adult had 1900 times more cells than a newborn. Or if you want to put it in scientific notation it would be 1.9 • 10^3
4 0
3 years ago
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