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sineoko [7]
3 years ago
11

Evaluate 3x – 4 when x=7. The value of the expression is​

Mathematics
2 answers:
amid [387]3 years ago
6 0

Answer:

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

3x+2=14

Step 1: Subtract 2 from both sides.

3x+2−2=14−2

3x=12

Step 2: Divide both sides by 3.

3x /3 = 12/3

<u>x=4</u>

Novay_Z [31]3 years ago
4 0

Answer:

17

Step-by-step explanation:

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DochEvi [55]

That's pretty ill-formatted but the answer is D

ax^2 + bx + c = 0

has roots given by

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Bonus quadratic formulas:

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x^2 - 2bx + c \textrm{ has zeros at }x=b \pm \sqrt{b^2-c}

ax^2 - 2bx + c \textrm{ has zeros at }x=\frac 1 a( b \pm \sqrt{b^2-ac})

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4 years ago
Why would a linear function be an appropriate model?
Nady [450]

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I know the answer

Step-by-step explanation:

Linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable. The independent variable is x and the dependent variable is y.

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3 years ago
What is the slope of the line?
AleksandrR [38]

Answer:

-1

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Pick a point and then count how many moves up/down and left/right to the next point.

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An aptitude test is designed to measure leadership abilities of the test subjects. Suppose that the scores on the test are norma
Komok [63]

Using the normal distribution, it is found that 0.0329 = 3.29% of the population are considered to be potential leaders.

In a <em>normal distribution</em> with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

  • It measures how many standard deviations the measure is from the mean.  
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In this problem:

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The proportion of the population considered to be potential leaders is <u>1 subtracted by the p-value of Z when X = 780</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = \frac{780 - 550}{125}

Z = 1.84

Z = 1.84 has a p-value of 0.9671.

1 - 0.9671 = 0.0329

0.0329 = 3.29% of the population are considered to be potential leaders.

To learn more about the normal distribution, you can take a look at brainly.com/question/24663213

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Answer:

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