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pychu [463]
3 years ago
5

Isolate x in 4x+4y=12

Mathematics
1 answer:
e-lub [12.9K]3 years ago
6 0
4x+4y=12
(-4y) (-4y)
4x= 12-4y
Divide 4
12-4y/4= x
I really hope it makes sense
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What is negative 5 and 3/4 as a fraction
Alinara [238K]

Answer:

-23/4

Step-by-step explanation:

-5\frac{3}{5}

-\frac{5x4+3}{4}

-\frac{20+3}{4}

-\frac{23}{4}

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3 years ago
Solve when G= -4/3 and h= 1/3 G+2h-3g-4h
Alexandra [31]

Answer:

2

Step-by-step explanation:

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Suppose ACT Composite scores are normally distributed with a mean of 20.6 and a standard deviation of 5.2. A university plans to
zimovet [89]

Answer:

The minimum score required for admission is 21.9.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 20.6, \sigma = 5.2

A university plans to admit students whose scores are in the top 40%. What is the minimum score required for admission?

Top 40%, so at least 100-40 = 60th percentile. The 60th percentile is the value of X when Z has a pvalue of 0.6. So it is X when Z = 0.255. So

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

0.255 = \frac{X - 20.6}{5.2}

X - 20.6 = 0.255*5.2

X = 21.9

The minimum score required for admission is 21.9.

8 0
3 years ago
Select all equations that have two solutions. a x^2=16 b 4x^2=0 c x^2=-16 d 3x+2=14 e x^2-1=24 f (x+8)(x-8)=0
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a )

{x}^{2}  = 16

x = ± \: 4

Two solutions.

_________________________________

b )

4 {x}^{2}  = 0

x = 0

One solution .

_________________________________

c )

{x}^{2}  =  - 16

No  \:  \: solution.

_________________________________

d )

3x + 2 = 14

x = 4

One solution.

_________________________________

e )

{x}^{2}  - 1 = 24

{x}^{2}  = 25

x =± \: 5

Two solutions.

_________________________________

f )

(x + 8)(x - 8) = 0

x =  - 8 \:  \: or \:  \: x = 8

Two solutions .

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

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3 years ago
Which expression has a positive quotient?
Dimas [21]
A because two negatives make a positive
4 0
3 years ago
Read 2 more answers
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