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3 years ago

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A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample informa

tion.Cups of Coffee Frequency0 7001 9002 6003 300 2,500Refer to Exhibit 5-7. The expected number of cups of coffee is:________.a. 1b. 1.2c. 1.5d. 1.7

1 answer:

MrMuchimi3 years ago

5 0

Answer:1.2c

Step-by-step explanation:

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2. The length of XZ is 28 units. If XY = 2x + 2 and YZ = 9x – 7, what are the lengths of XY and

Novosadov [1.4K]

Answer:

XY = 8 and YZ = 20

Step-by-step explanation:

If XY and YZ are on the one line, we can write

XY + YZ = 28

(2x+2) + (9x - 7) = 28

2x+2 + 9x - 7 = 28

11x - 5 = 28

11x = 33

x = 3

XY = 2x+2 = 2*3 + 2 = 8

YZ = 9x - 7 = 9*3 - 7 = 27 - 7 = 20

8 0

3 years ago

Simplify the expression . (x^-4)^-6 A. x^-24 B. x^-10 C. x^10 D. x^24

sladkih [1.3K]

Answer:

$D.$ $x^2^4$

Step-by-step explanation:

$(x^-^4)^-^6$

$=x^2^4$

4 0

3 years ago

12345678910112131415161718192021212223242526272829303132333435363738394041424344454647484950

jeka57 [31]

Answer: what what! Confused

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Check to see the given number is a solution of the equation or inequality x+9=17;8

timofeeve [1]

Yes, 8 is a solution to the equation

6 0

3 years ago

1. Match the polynomial identity to the correct answer.

Katen [24]

Answer:

$a: (a-b)(a+b);b: (a-b)(a^{2}+ab+b^{2}); c: (a^{2} +2ab+b^{2}); d: (a+b)(a^{2}- ab+b^{2})$

Step-by-step explanation:

Given the expressions all that is required is to expand them (using the distributive property) to see which answers they match up to:

For a: $(a-b)(a+b)=a^{2} +ab-ab-b^{2} =a^{2}-b^2$

For b: $(a-b)(a^2+ab+b^2)=a^3+a^2b+ab^2-a^2b-ab^2-b^3=a^3-b^3$

For c calculate the square of a sum: $(a+b)^2=a^2+ab+ab+b^2$

(add like terms) c: $a^2+2ab+b^2$

For d: $(a+b)(a^2-ab+b^2)=a^3-a^2b+ab^2+a^2b-ab^2+b^3$ $=a^3+b^3$

5 0

3 years ago