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2 years ago

Solve each equation with the quadratic formula. x2 -7x +10= 0

Mathematics

1 answer:

zhenek [66]2 years ago

5 0

Answer: x=5, x=2

Step-by-step explanation: try symbolab for these questions...it helps out a lot.

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(1 pt) In a study of red/green color blindness, 950 men and 2050 women are randomly selected and tested. Among the men, 89 have

Ivahew [28]

Answer: (0.066,0.116)

Step-by-step explanation:

The confidence interval for proportion is given by :-

$p_1-p_2\pm z_{\alpha/2}\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}$

Given : The proportion of men have red/green color blindness = $p_1=\dfrac{89}{950}\approx0.094$

The proportion of women have red/green color blindness = $p_2=\dfrac{6}{2050}\approx0.003$

Significance level : $\alpha=1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=\pm2.576$

Now, the 99% confidence interval for the difference between the color blindness rates of men and women will be:-

$(0.094-0.003)\pm (2.576)\sqrt{\dfrac{0.094(1-0.094)}{950}+\dfrac{0.003(1-0.003)}{2050}}\approx0.091\pm 0.025\\\\=(0.09-0.025,0.09+0.025)=(0.066,\ 0.116)$

Hence, the 99% confidence interval for the difference between the color blindness rates of men and women= (0.066,0.116)

4 0

3 years ago

I will mark you as a brainliest!

Nina [5.8K]

I think it is non-statistical as it has only one possible answer

6 0

2 years ago

What’s the variance

creativ13 [48]

A is the right answer

8 0

2 years ago

How do you convert the general equation form of a circle to standard form? Answer correctly to get 20 points. Please provide an

ivanzaharov [21]

Answer:

Step-by-step explanation:

The standard form of a circle's equation is (x-h)² + (y-k)² = r² where (h,k) is the center and r is the radius. To convert an equation to standard form, you can always complete the square separately in x and y.

5 0

2 years ago

Help for good luck<br> and a lot of money

Alex777 [14]

1= 12.2
8=97.6
and for the last one the answer is 10 :))

5 0

1 year ago

Read 2 more answers