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Anton [14]
3 years ago
9

Evaluate The Expression 3(× - 1)² +2× - 7 for × = 3

Mathematics
2 answers:
Over [174]3 years ago
8 0
(hope that helps )

ANSWER: 35

STEP BY STEP:

First rewrite the equation
(sry I cannot do exponents so I put the whole #) ⇩

3(x-1)2 + 2x -7

Then substitute x for what it is, in this case 3.

3(3-1)2 + 2x -7

Distribute

(9-3)2 + 2(3) - 7

Solve what is inside the parentheses

6 2 + 2(3) - 7

Solve exponents

36 + 2(3) - 7

Solve multiplication

36 + 6 - 7

Add

42 - 7

Subtract for final answer

35
jeyben [28]3 years ago
6 0

\bf 3(x-1)^2+2x-7\implies \stackrel{\stackrel{x=3}{\cfrac{}{}}}{3[(3)-1]^2+2(3)-7}\implies 3[2]^2+6-7 \\\\\\ 3[4]+(-1)\implies 12-1\implies 11

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Step-by-step explanation:

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Step-by-step explanation:

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In a class of 25 students, 15 of them have a driver's license. If ten students are randomly selected, what is the expected numbe
const2013 [10]

Answer:

<em>Expected number of students  would have a driver's license = 6</em>

Step-by-step explanation:

<u><em>Explanation</em></u>:-

Given data In a class of 25 students, 15 of them have a driver's license

The sample proportion

                                p = \frac{x}{n} = \frac{15}{25} = 0.6

Let 'X' be the binomial distribution

Given sample size 'n' = 10

<em>mean of the binomial distribution or expected number of students  would have a driver's license</em>

                                 μ = n p

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                                   = 6

<u><em>Conclusion</em></u>:-

<em>Expected number of students  would have a driver's license = 6</em>

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