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3 years ago

21x + 7 In distributive property

Mathematics

1 answer:

lilavasa [31]3 years ago

8 0

Answer: 7(3x + 1)

Step-by-step explanation:7 goes into 21 3 times so the 3 is left in the parenthesis along with the one because 7 goes into 7 once

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Correlation coefficients can test ______ variable(s) at a time. a. two or more b. only one c. one or more d. only two

Vika [28.1K]

Correlation coeffiencients is used to determine the relationships between data, Correlation coefficients can test two or more variable(s) at a time

<h3 /><h3>What are correlation coefficients?</h3>

This is a linear correlation between sets of data. This coefficient can only be between -1 and 1.

Positive values show a positive correlation while a negative value shows negative correlation. A correlation coefficient of zero shows no relationship between variables.

Based on the explanation, we can conclude that Correlation coefficients can test two or more variable(s) at a time

Learn more on correlation here: brainly.com/question/4219149

4 0

1 year ago

The graph of the distance a car travels at a constant speed passes through the points (0,0) and 2,136). The x scale is hours and

Zepler [3.9K]

We are given that

y-scale is a distance in miles

x-scale is a time in hours

and we are given

The graph of the distance a car travels at a constant speed passes through the points (0,0) and (2,136)

so, points would be

(0,0)

x1=0 , y2=0

(2,136)

x2=2 , y2=136

so, slope would be speed

because speed = distance / time

we can use slope formula

$m=\frac{y_2-y_1}{x_2-x_1}$

now, we can plug values

$m=\frac{136-0}{2-0}$

$m=68$ miles per hour

so, option-B..........Answer

6 0

2 years ago

Read 2 more answers

There are 6 girls and 18 boys in a class. What percentage of the class are girls?

grandymaker [24]

Answer:

25% are girls

4 0

2 years ago

Read 2 more answers

What’s the scale factor

dem82 [27]

Answer:

Step-by-step explanation:

The scale is depending on the size of each cat. Lets say the larger cat is A and the smaller one is B. The scale factor from B to A is 1.75 (or 3.5/2)

when solving for scale factor you divide the original drawing and scale drawing. Original is denominator, Scale is Numerator.

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2 years ago

The Art and History Museum offers a family discount card for a donation of $57. I The table shows the price per person with and

Murljashka [212]

Answer:

8 number of visits will be the total cost of the visits (including the price of the discount card) be less expensive for a family of 2 adults and 1 child if they have purchased the discount card

Step-by-step explanation:

Price without Discount Card Price with Discount Card

Ticket (12 & Under) $10 $8

Adult's Ticket $15 $12

Let x be the number of visits

Price without discount card for 2 adults and 1 child ticket

Price without discount for x visits = $x(15 \times 2+ 10)=40x$

Price with discount for x visits = $57+ x(12 \times 2+ 8)=57+32x$

Now to find For what number of visits will the total cost of the visits (including the price of the discount card) be less expensive for a family of 2 adults and 1 child if they have purchased the discount card

57+32x< 40x

57<8x

7.1<x

So, 8 number of visits will be the total cost of the visits (including the price of the discount card) be less expensive for a family of 2 adults and 1 child if they have purchased the discount card

8 0

3 years ago