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Lemur [1.5K]
3 years ago
11

Pls help!!! 30 points

Mathematics
2 answers:
Maru [420]3 years ago
7 0

Answer:

D. 2.4x -4.4

Step-by-step explanation:

0.3(4x-8)-0.5(-2.4x+4)

1.2x-2.4-0.5(-2.4x+4)

1.2x-2.4+1.2x-2

2.4x-4.4

ikadub [295]3 years ago
6 0

Answer:

2.4x-4.4

Step-by-step explanation:

0.3(4x-8)-0.5(-2.4x+4)

1.2x-2.4+1.2x-2

2.4x-4.4

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High school students across the nation compete in a financial capability challenge each year by taking a National Financial Capa
Mekhanik [1.2K]

Answer:

A student have to score 1.28 standard deviations above the mean o be publicly recognized.

Step-by-step explanation:

If X \sim N (\mu, \sigma^{2}), then Z=\frac{X-\mu}{\sigma}, is a standard normal variate with mean, E (<em>Z</em>) = 0 and Var (<em>Z</em>) = 1. That is, Z \sim N (0, 1).

The distribution of these <em>z</em>-variates is known as the standard normal distribution.

In statistics, a standardized score is the number of standard deviations an observation or data point is above the mean.

Thus, <em>z</em>-scores are a type of standardized scores.

It is provided that the students who score in the top 13 percent in the National Financial Capability Challenge Exam are recognized publicly for their achievement by the Department of the Treasury.

Let <em>x</em> be score of the top 13%.

So, to be are recognized publicly for their achievement by the Department of the Treasury the probability of score <em>x</em> must be:

P (X < x) = 0.90

⇒ P (Z < z) = 0.90

The value of <em>z</em> for the above probability is:

<em>z </em>= 1.28

*Use a <em>z</em>-table.

Thus, a student have to score 1.28 standard deviations above the mean o be publicly recognized.

8 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP!!! Solve for X. 15=7x+3-5x X=_(simplify your answer)
dedylja [7]

Answer:

X=6

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

15=7x+3−5x

15=7x+3+−5x

15=(7x+−5x)+(3)(Combine Like Terms)

15=2x+3

15=2x+3

Step 2: Flip the equation.

2x+3=15

Step 3: Subtract 3 from both sides.

2x+3−3=15−3

2x=12

Step 4: Divide both sides by 2.

2x2=122

x=6

Answer:

x=6

8 0
3 years ago
7x-4=5x+15 solve the following equation
Sergeeva-Olga [200]
Remember you can do anything to an equaiton as long as you do it to both sides


7x-4=5x+15
minus 5x both sides
2x-4=15
add 4 both sides
2x=19
divide by 2
x=19/2

3 0
3 years ago
4)
irakobra [83]
X = 42 - 19, so A - x = 23
7 0
3 years ago
Read 2 more answers
How much space is inside the steps?
dexar [7]
.015 + .06= .075

not sure if this is correct i did my best
5 0
3 years ago
Read 2 more answers
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