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Serggg [28]
2 years ago
5

Olivia wants to know the proportion of students at her school who use a

Mathematics
1 answer:
AveGali [126]2 years ago
4 0

Answer:

A

Step-by-step explanation:

Random sampling is a sampling method where each sample has an equal chance of being chosen. The random sample chosen is meant to be an unbiased representation of the population.

If 30% of the sample uses the app, it means that 30% of the population are likely to use the app

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 ≥ can be written in both the circles

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3 years ago
Sandra received 15 twenty dollar bills. She spent 3/5 and saved 2/5 How much did she save
sweet [91]

Answer:

300

Step-by-step explanation:

15 * 20 = 300

she spent 3/5 * 300 = 180

and saved 2/5 * 300 = 120

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2 years ago
After being rearranged and simplified, which of the following equations could
masha68 [24]

Answer:

C and D

Step-by-step explanation:

The quadratic formula is

x= (-b±√b²-4ac)/2a

The formula uses the numerical coefficients in the quadratic equation.

The general quadratic equation is ax²+bx+c where a, b and c are the numerical coefficients

So, lets try and see;

A.

5x+4=3x^4-2\\\\=3x^4-5x-2-4\\=3x^4-5x-6\\a=3,b=-5,c=-6

But due to the fact that  in this equation you have x⁴, the equation is not a quadratic equation thus can not be solved using this formula

B

-x^2+4x+7=-x^2-9\\\\\\=-x^2+x^2+4x+7+9\\=4x+16

C

9x+3x^2=14+x-1\\\\\\=3x^2+9x-x-14+1\\\\=3x^2+8x-13\\\\\\a=3,b=8,c=-13\\

D.

2x^2+x^2+x=30\\\\\\=3x^2+x-30\\\\\\a=3,b=1,c=-30

From the checking above, the equations will be C and D

7 0
3 years ago
Read 2 more answers
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32 bc eight times four equals 32
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Hel[ppppppppppp brainliestt
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Answer: I think it is 10364 or 10248 because when i put it in a calculator I got 8803.4 or 10296

Step-by-step explanation:

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2 years ago
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