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ELEN [110]
2 years ago
6

Given the function f(x) = 2x – evaluate f (4). Enter your answer as a decimal.

Mathematics
1 answer:
Nataly_w [17]2 years ago
7 0

Step-by-step explanation:

F(x)=2x

but x= 4

F(x)= 2(4)

F(x)= 8

1/8 is same as 8

0.125

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A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 14901490 and the standard dev
kicyunya [14]
<h2>Answer with explanation:</h2>

Given : A standardized​ exam's scores are normally distributed.

Mean test score : \mu=1490

Standard deviation : \sigma=320

Let x be the random variable that represents the scores of students .

z-score : z=\dfrac{x-\mu}{\sigma}

We know that generally , z-scores lower than -1.96 or higher than 1.96 are considered unusual .

For x= 1900

z=\dfrac{1900-1490}{320}\approx1.28

Since it lies between -1.96 and 1.96 , thus it is not unusual.

For x= 1240

z=\dfrac{1240-1490}{320}\approx-0.78

Since it lies between -1.96 and 1.96 , thus it is not unusual.

For x= 2190

z=\dfrac{2190-1490}{320}\approx2.19

Since it is greater than 1.96 , thus it is unusual.

For x= 1240

z=\dfrac{1370-1490}{320}\approx-0.38

Since it lies between -1.96 and 1.96 , thus it is not unusual.

5 0
3 years ago
Find the value of x.<br> 6<br> 14<br> 8<br> 0<br> 21<br> x = [ ? ]<br> 3x-12
love history [14]

Answer: 7

Step-by-step explanation:

By the angle bisector theorem,

\frac{21}{14}=\frac{3x-12}{6}\\21(6)=14(3x-12)\\126=14(3x-12)\\9=3x-12\\21=3x\\x=\boxed{7}

4 0
2 years ago
Write an equation for the line that passes through (- 3, 5) and is parallel to y = - 6x + 1.
soldier1979 [14.2K]

Answer:

y-5 = -6(x+3) OR y = -6x-13

Step-by-step explanation:

Let's use slope-intercept form to solve this problem.

Slope intercept form is the following:

y-y1 = m(x-x1)

x1 and y1 are given by the point in the problem.

x1 = -3, y1 = 5.

m is given by the equation in the problem. Lines that are parallel have the same slope. Thus,

m = -6.

If we plug these values into the equation for slope intercept form, we get the following:

y-5 = -6(x-(-3)) which becomes y-5 = -6(x+3)

This is an acceptable answer to the problem. However, point-slope form is also a way it can be written.

y-5 = -6x-18

y = -6x-13

3 0
2 years ago
What is 20% of 1630?
sveticcg [70]
20% = 0.20.2 * 1630 = 326
4 0
3 years ago
Read 2 more answers
PLEASE HELP I SUCK AT MATH
natka813 [3]

Answer:

Im pretty sure it's A because Z and AZ are collinear

6 0
3 years ago
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