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Alisiya [41]
3 years ago
7

Bryce wrote the linear regression equation (Y=1.123x-6.443 to predict arm span,y,of a person who is x inches tall Riley has an a

rm span of 67.5 inches. Which is the best prediction of riley's height?
A:54.36
B:65.84
C:66.55
D:69.36​
Mathematics
1 answer:
Naya [18.7K]3 years ago
7 0
B) 65.84 add 67.5 and 6.443 and divide sum by 1.123
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10=ax+bx solve for x <br> With steps please
laila [671]

Answer:

\displaystyle 10 = ax + bx \rightarrow x = \frac{10}{a + b}

General Formulas and Concepts:

<u>Pre-Algebra</u>

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Factoring

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

\displaystyle 10 = ax + bx

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Factor:                                                                                                               \displaystyle 10 = ax + bx \rightarrow 10 = x(a + b)
  2. [Division Property of Equality] Divide a + b on both sides:                           \displaystyle 10 = ax + bx \rightarrow x = \frac{10}{a + b}
7 0
3 years ago
Which of the following expenses is not a variable cost?
Sindrei [870]
It’s rent because variables are related to the sales volume of your business
4 0
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3x + 3(x + y) ? <br><br> Help!
tatuchka [14]

Answer:

=6x+3y

Step-by-step explanation:

3X+3(X+Y)

Distribute:

=3X+(3)(X)+(3)(Y)

=3X+3X+3Y

Combine Like Terms:

=3x+3x+3y

=(3x+3x)+(3y)

=6x+3y

4 0
3 years ago
According to the United States Health and Human Services, the mean height for Americans is 1.757 meters for men and 1.618 meters
Alchen [17]

Answer:

Her z-score is 2.03.

Step-by-step explanation:

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

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

Michelle’s height is 1.758 meters. What is her z-score?

Michelle's is a woman.

The average height of women is \mu = 1.618 and the standard deviation is \sigma = 0.069

This is Z when X = 1.758. So

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

Z = \frac{1.758 - 1.618}{0.069}

Z = 2.03

Her z-score is 2.03.

7 0
3 years ago
A color printer can print 36 pages in three minutes in 108 pages in nine minutes if the number of pages varies directly with the
nignag [31]

Answer:

12 pages per minutes

Step-by-step explanation:

36 pages in 3 minutes, so each minutes can print 12 pages

And 108 pages in 9 minutes, which is still 12 pages

So 12 pages per minute

7 0
3 years ago
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