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3 years ago

Which polynomial represents the sum below? (3x2 + 3) + (3x2 + x + 4)

Mathematics

1 answer:

DIA [1.3K]3 years ago

6 0

Add like terms just like you would anywhere else... $6 x^{2} +x+7$

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Find the ratio of the following with solution<br>a. 30min:1.5hours

scoray [572]

Ok 30min:120 min

= divided both by 30

~ gives you 1:4

4 0

3 years ago

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3. If Jeff is walking 2 miles per hour (mph), how far can he travel in 1 hour?

Ipatiy [6.2K]

Jeff can travel 2 miles in one hour

4 0

3 years ago

Solve for x<br> solve for x<br> solve for x

Rainbow [258]

Answer:

4x+12=120°

X=12-4=120°

X=8=120

X=120/8

X=15

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3 years ago

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How to do this ? Wat or how do you work this out I need help this is due tmrw

velikii [3]

So first divide the equation on both sides by 3. We get $x - 2y = 4
$ . Slope-y-intercept form is of the form $y = mx + b$ . Rearranging $x - 2y = 4
$ , we get $2y = x - 4$ . Divide by two, we get $y = \frac{x}{2} - 2$ , which is of that form.

Graphing: The y intercept is at -2, and the slope is 1/2.

4 0

3 years ago

In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 8% of the people in this sample had pinworm b

kow [346]

Answer: a) 453 b) 1537

Step-by-step explanation:

As per given , we have

Margin of error : E= 0.025

Critical value for 95% confidence interval : $z_{\alpha/2}=1.96$

a) The prior estimate of population proportion : p=0.08

Required sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.08(1-0.08)(\dfrac{1.96}{0.025})^2\\\\=452.386816\approx453$

The minimum sample size is 453 U.S. adults.

b) Since the prior estimate of population proportion is not available , so we take p= 0.5

Required sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.025})^2\\\\=1536.64\approx1537$

The minimum sample size is 1537 U.S. adults.

5 0

4 years ago