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3 years ago

What is the sum of 2x2 + 6x + 5 and 3x2 – 2x – 1?

Mathematics

1 answer:

Kipish [7]3 years ago

3 0

5x2 + 4x + 4

Hope this helps!!!!!

Brainliest plzzzzz

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If it has the little line under the > sign then x = 5

Step-by-step explanation:

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3 years ago

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torisob [31]

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Step-by-step explanation:

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3 years ago

Solve the inequality. –6 < 2x – 4 < 4

Darya [45]

Answer:

–1 < x < 4

Step-by-step explanation:

Let's solve your inequality step-by-step.

−6<2x−4<4

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3 years ago

If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

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3 years ago

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Artyom0805 [142]

Answer: wait up getting your answers

Step-by-step explanation:

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3 years ago