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stira [4]
4 years ago
11

(7x²+8+5)+(3x²-2x-2) add polynomials​

Mathematics
1 answer:
eimsori [14]4 years ago
3 0

Answer:

10x²+11-2x

Step-by-step explanation:

I hope you mean 7x²+8+5, not 7x²+8x+5.

We need to combine like terms. Anything with squared should be added together, et cetera.

(7x²+8+5)+(3x²-2x-2)

You can take out the parenthesis, because they don't matter in addition.

7x²+8+5+3x²-2x-2

Add the terms, step by step. Each bold pair needs to be added together.

7x²+8+5+3x²-2x-2

10x²+8+5-2x-2

10x²+11-2x

Now there's no more we can add together.

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Trina buys a pizza in the shape of a circle with a diameter of 14 in what is the area of the pizza​
ioda

Answer:

153.94

Step-by-step explanation:

A = pi * r^2

A = pi * 7^2 (radius is half of the diameter)

A = 49 * pi

A = 153.94

i hope this helps !!

3 0
3 years ago
Why is the addictive inverse of a positive number negative
Ivanshal [37]

Answer:

See below.

Step-by-step explanation:

The additive inverse is the number which added to it will make 0. Since a positive and a negative are like have $1 and in debt $-1, when added together they make 0. Every negative number has a positive number which makes it 0 and so does every positive number have a negative number which makes it 0.

7 0
3 years ago
The perimeter of rectangle is 48ft the length is 16 from. Whats is the area?
solniwko [45]

Answer:

128

Step-by-step explanation:

There are 2 lengths, 16 x 2 = 32. 48 - 32 = 16. 16 divded by 2 equals 8. 8 x 16 = 128.

7 0
3 years ago
A reproductive clinic had a success rate of 25% of patients with live births in 2008. They want to update their success rate (th
Anastasy [175]

Answer:

They should sample the results of 1990 patient results.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

A reproductive clinic had a success rate of 25% of patients with live births in 2008.

This means that \pi = 0.25

99% confidence level

So \alpha = 0.01, z is the value of Z that has a p-value of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

If they want their estimate to be within 2.5%, how many patient's results should they sample if they plan to use a 99% confidence interval?

They should sample n patients.

n is found for M = 0.025. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.025 = 2.575\sqrt{\frac{0.25*0.75}{n}}

0.025\sqrt{n} = 2.575\sqrt{0.25*0.75}

\sqrt{n} = \frac{2.575\sqrt{0.25*0.75}}{0.025}

(\sqrt{n})^2 = (\frac{2.575\sqrt{0.25*0.75}}{0.025})^2

n = 1989.2

Rounding up:

They should sample the results of 1990 patient results.

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3 years ago
Can I use Brainly on my laptop
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Answer:

Yeah if you want too

Step-by-step explanation:

5 0
3 years ago
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