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4 years ago

2/3 of a class is girlsa) What is the ratio girls to boys in the class?

Mathematics

1 answer:

Mice21 [21]4 years ago

4 0

Answer:

3:2

Step-by-step explanation:

2 boys for every 3 girls

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Rewrite the equation 2x-4y=8 in slope intercept form

melisa1 [442]

$2x - 4y - 2x = 8 - 2x \\ - 4y = - 2x + 8 \\ \frac{ - 4y}{ - 4} = \frac{ - 2x}{ - 4} + \frac{8}{ - 4} \\ y = \frac{1}{2} x - 2$
The final answer follows the y=mx+b, where m is the slope and b is the y intercept. So the slope is equal to 1/2 and the y intercept is equal to - 2.

4 0

3 years ago

A researcher for a paint company is measuring the level of a certain chemical contained in a certain type of paint. If the paint

ziro4ka [17]

Answer: The sample should contain 4870 cans of paint.

Step-by-step explanation:

According to the given information , we have

The prior estimate of proportion= $p=0.10$

Margin of error : E=0.01

Critical value for 98% confidence interval = $z_{\alpha/2}=2.326$

Formula to find the sample size :

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

i.e. $n=0.10(1-0.10)(\dfrac{2.326}{0.01})^2$

$=4869.2484\approx4870$

Hence, the sample should contain 4870 cans of paint.

5 0

4 years ago

It takes Mrs. Self 6 hours to bake 53 cookies. What is the constant of proportionality? Write your answer as a decimal rounded t

nika2105 [10]

Answer:

I believe its 8.8.

Step-by-step explanation:

What I did was divide 53 by 6.

8 0

3 years ago

Which trinomial is equivalent to 3(x-2)^2-2(x-1)?

attashe74 [19]

If you would like to solve 3 * (x - 2) ^2 - 2 * (x - 1), you can calculate this using the following steps:

3 * (x - 2) ^2 - 2 * (x - 1<span>) = 3 * (x^2 - 2 * 2 * x + 2^2) - 2 * x + 2 * 1 = 3 * x^2 - 3 * 4 * x + 3 * 4 - 2 * x + 2 = 3 * x^2 - 12 * x + 12 - 2 * x + 2 = 3 * x^2 - 14 * x + 14
</span>
The correct result would be <span>3 * x^2 - 14 * x + 14.</span>

8 0

4 years ago

Are these the correct answers? Why or why not?

Alinara [238K]

Answer:

Yes, they are correct

Step-by-step explanation:

The width of the interval is 9 − 5 = 4. So the minimum possible value of the area is 4m, and the maximum possible value of the area is 4M.

3 0

3 years ago

2/3 of a class is girlsa) What is the ratio girls to boys in the class?​

2/3 of a class is girlsa) What is the ratio girls to boys in the class?