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3 years ago

What do banana and grammar have in common?

1 answer:

4 0

If you move the first letter to the end of the word, it forms the same word backwards. Banana = ananab, dresser = resserd, and so on. If you move the first letter to the end of the word, it forms the same word backwards.

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Solve for x.<br> 2x² +21x-61 = (x+7)²<br><br> Please

Ymorist [56]

Answer:

$x = \frac{-7 +\sqrt{489} }{2}$

$x = \frac{-7 - \sqrt{489} }{2}$

Step-by-step explanation:

2x² +21x-61 = (x+7)²

expand

2x² + 21x - 61 = x² + 14x +49

move everything to one side

x² + 7x - 12 = 0

use quadratic formula

$x = \frac{-b +- \sqrt{b^{2}-4ac } }{2a}$

plug in the values

$x = \frac{-7 +- \sqrt{7^{2}-4(1)(-110) } }{2(1)}$

solve

$x = \frac{-7 +- \sqrt{49-4(1)(-110) } }{2}$

$x = \frac{-7 +- \sqrt{49 + 440 } }{2}$

$x = \frac{-7 +- \sqrt{489} }{2}$

7 0

2 years ago

Read 2 more answers

What is the best estimate of the mean age of all the people in the tour group?

marissa [1.9K]

Mean = (19 +27 +25+21+44+22+45+34)/8 = 29.625≈30 years

Answer is 30.

7 0

3 years ago

Read 2 more answers

If you hike 2 3/4 miles in 1 hour and 15 minutes how many miles can you hike an hour?

larisa86 [58]

I think it's something like a mile or so, maybe a mile and a half. Sorry if I'm wrong.

8 0

4 years ago

What is a common mistake for finding slope from 2 points

azamat

Answer:

A common mistake is doing x2-x1/y2-y1 instead of the correct slope formula which is y2-y1/x2-x1

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

18. In a recent survey, 75% of the community favored building a police substation in their neighborhood. If 10 citizens are chos

tatuchka [14]

Answer: 0.28157

Step-by-step explanation:

Given, The proportion of the community favored building a police substation in their neighborhood: p= 0.75

Number of citizens are chosen: n= 10

Let x be the binomial variable that represents the number of citizens favor the building of the police substation.

Then, the probability that exactly 8 of them favor the building of the police substation will be :

$P(x=8)=\ ^{10}C_8(0.75)^8(1-0.75)^2$

[Using binomial probability function $P(X=x)=^nC_xp^x(1-p)^{n-x}$ ]

$=\dfrac{10!}{8!2!}(0.100113)(0.0625)\\\\=0.2815678125\approx0.28157$

Hence, the probability that exactly 8 of them favor the building of the police substation =0.28157

5 0

4 years ago