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3 years ago

5

14. Using 1 inch = 15 feet as the scale factor, what are the blueprint dimensions of a room in a model house that is actually 30

feet x 45 feet?
O2 in x 3 in.
O 3 in 2 in
O2 in x 2 in
O 3 in x 2 in

1 answer:

Goryan [66]3 years ago

7 0

2 in x 3 in; you divide 30 and 45 by 15 and get 2 and 3.

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Rewrite the equation by completing the square 2x^2-20x=x^2-19

sergeinik [125]

Answer:

x = -1, 19

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtract Property of Equality

<u>Algebra I</u>

Standard Form: ax² + bx + c = 0
Factoring
Multiple Roots
Completing the Square: -b/(2a)

Step-by-step explanation:

<u>Step 1: Define</u>

2x² - 20x = x² - 19

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

[Subtraction Property of Equality] Subtract x² on both sides: x² - 20x = -19
Complete the Square [Addition Property of Equality]: x² - 20x + 100 = -19 + 100
[Complete the Square] Simplify: (x - 10)² = 81
[Equality Property] Square root both sides: x - 10 = ±9
[Addition Property of Equality] Add 10 on both sides: x = 10 ± 9
Evaluate: x = -1, 19

7 0

3 years ago

Read 2 more answers

Unnithan, Houser, and Fernhall (2006) were interested in whether playing the game Dance Dance Revolution (DDR) met the American

riadik2000 [5.3K]

Answer:

The conclusion that both groups of overweight and non - overweight got cardiovascular benefit from playing DDR games requires Inferential statistics.

Step-by-step explanation:

Inferential statistics is simply a type of research statistic whereby a generalized conclusion is made about a larger group based on representative observations

Now,in the given question, we see that both group hearts were above the minimum recommended for cardiovascular exercise. Now we can infer that the DDR games played by both groups gave them cardiovascular benefits. This conclusion is an example of Inferential statistics where we generalize about a large population based on observations from a small sample.

Thus the conclusion that both groups of overweight and non-overweight got cardiovascular benefit from playing DDR games requires Inferential statistics.

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4 years ago

Jack and Jill are walking to school. After 20 minutes, Jack walked 4/5 mile. After 25 minutes, Jill walked 5/6 mile. What is the

Zinaida [17]

Answer: Jill: 2mph and jack: 2 2/5 I had this in my test lol and tell me if it was right for you all

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3 years ago

SCHOOLS Jefferson High School has 100 less than 5 times as many studentsas Taft High School. Write and evaluate an expression to

posledela

Let x = the number of students at Taft high school
5x-100 = the number of students at Jefferson high school
if x =300 than 5(300)-100=1500-100=1400 students at Jefferson high school

4 0

4 years ago

Can somebody help me out with this please?

Crank

Answer:

2 marbles

Step-by-step explanation:

Lana has 3 bags with x marbles in each bag totaling 12 marbles

3x=12

Divide by 3

3x/3 =12/3

x =4

Each bag has 4 marbles

Markus has 3 bags with y marbles totaling 18 marbles

3y =18

Divide each side by 3

3y/3 =18/3

y =6

Each bag has 6 marbles

6-4 =2

There are 2 more marbles in Markus' bags than in Lara's

4 0

3 years ago