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4 years ago

(2x+7)(3x-5) What is the answer of this question ?

Mathematics

1 answer:

gladu [14]4 years ago

8 0

The answer is 6x^2+11x-35

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ABC stock sold for $64.50 four days later the same stock sold for $47.10 what is the average change per day?

Masteriza [31]

64.50-.10=64.40
64.40-47=17.4
(my way of working math when i'm not in school is weird, but still accurate)

17.4/4=4.35.

It's average change per day is -4.35.

8 0

3 years ago

Find the midpoint of the segment with the given endpoints (-5,-9) and (-9,-3)

meriva

Answer:

(-7,-6)

Step-by-step explanation:

$x = \frac{ -5 - 9}{2} = - 7 \\ \\ y = \frac{ - 9 - 3}{2} = - 6 \\$

7 0

3 years ago

Write a function in any form that would match the graph shown below.

Pani-rosa [81]

Answer:

(x-6)(x+5)^2 - 50

5 0

3 years ago

The variance of the scores on a skill evaluation test is 143,641 with a mean of 1517 points. If 343 tests are sampled, what is t

Vlad1618 [11]

Answer:

The probability that the mean of the sample would differ from the population mean by less than 36 points=0.9216

Step-by-step explanation:

We are given that

The variance of the scores on a skill evaluation test=143,641

Mean=1517 points

n=343

We have to find the probability that the mean of the sample would differ from the population mean by less than 36 points.

Standard deviation, $\sigma=\sqrt{143641}$

$P(|x-\mu|$

$=P(|Z|$

$=0.9216$

Hence, the probability that the mean of the sample would differ from the population mean by less than 36 points=0.9216

5 0

3 years ago

Solve the equations below. Give exact solutions only. Show your work.

kolbaska11 [484]

Answer:

A. 5x² - 7 - 72 = 0

5x² - 79 = 0

x = ± √-4ac / 2a

x = ± √- 4 (5) (-79) / 2 (5)

x = ± √ 1580 / 10

x = ± 39.749/10

x = + 39.749/10 x = -39.749/10

= 3.9749 = - 3.9749

B. x² + 2x - 5 = 0

x = - b ± √b² - 4ac / 2a

= - 2 ± √2² - 4 (1) (-5) / 2 (1)

= - 2 ± √4 + 20 / 2

= - 2 ± √ 24 / 2

x = - 2 + 4.898 /2 x = - 2 - 4.898 / 2

= 2.898/2 = -6.898/2

= 1.449 = - 3.449

C. 3x² + 2x - 4 = 0

x = - b ± √b² - 4ac / 2a

= - 2 ± √2² - 4 (3) (-4) / 2 (3)

= - 2 ± √4 + 48 / 6

= - 2 ± √ 52 / 6

x = - 2 + 7.211 /6 x = - 2 - 7.211 / 6

= 5.211/6 = - 9.211 /6

= 0.869 = - 1.535

Hope that helps

Please to re-check answers

5 0

2 years ago