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Harrizon [31]
2 years ago
5

If the office furniture costs $9,900 and it was three times as expensive as the office computer, what was the cost of the comput

er?
A-$2,300.00
B-$1,450.00
C-$3,300.00
D-$1,900.00
Mathematics
2 answers:
Ray Of Light [21]2 years ago
4 0

Answer:

C-$3,300.00

Step-by-step explanation:

Let the office furniture be x and the office computer be y

If the Office furniture x is three times as expensive as office computer y

x = 3y

Remember office furniture x = $9900

Therefore $9900 = 3y

Divide both sides by 3

$9900/3 = y

y = $3,300.00

Readme [11.4K]2 years ago
3 0

Answer: 3,300

Step-by-step explanation:

9,900÷3

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Vadim26 [7]

Answer:

Z = 2.1\ is\ higher\ than\ 1.96, we\ reject\ H_o

Step-by-step explanation:

The explanation of given question is described below:

Here, the test of hypothesis states that

H_o : Mean = 28.6

H_a : Mean\ which\ is\ not\ equals\ 28.6

The test statistic is

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Z = \frac{(30.06 - 28.6)}{\frac{4.18}{6} }

= 2.1

According to the given data α = 0.05,

So, the major value is

IZ(0.025)I = 1.96

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Finally

Z = 2.1\ is\ higher\ than\ 1.96, we\ reject\ H_o

3 0
2 years ago
The radius of a cylinder is 5" and the lateral area is 70 sq. in. Find the length of the altitude. 2.8" 7" 14"
algol13
The correct question is
<span>The radius of a cylinder is 5" and the lateral area is 70pi sq. in. Find the length of the altitude.
</span>
we know that

[surface lateral area]=(2*pi*r)*height
height= [surface lateral area]/(2*pi*r)
surface lateral area=70*pi in²
r=5 in 
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height= [70*pi]/(2*pi*5)------> 7 in

the answer is
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2 years ago
O find the minimum value of the quadratic expression −4x2+8x−25,
fredd [130]

Answer:

Marla didn't use the right steps to complete the square. Maria made a mistake in step 1, she put 8x instead of -2x

Step-by-step explanation:

we have

-4x^{2}+8x-25

This is a vertical parabola open downward

The vertex is a maximum

Find the vertex

step 1

Factor the leading coefficient -4

-4(x^{2}-2x)-25

step 2

Complete the square

-4(x^{2}-2x+1-1)-25

step 3

-4(x^{2}-2x+1)-25+4

-4(x^{2}-2x+1)-21

step 4

Rewrite as perfect squares

-4(x-1)^{2}-21

the vertex is the point (1,-21)

so

The maximum value of the quadratic equation is (1,-21)

therefore

Marla didn't use the right steps to complete the square. Maria made a mistake in step 1, she put 8x instead of -2x

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Jeff saved $500 from his summer job so he would have spending money during the school year. He withdraws $12 from his account ea
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Answer:

576.2

Step-by-step explanation:

The formula for the area of a triangle is \frac{bh}{2}. Since this square pyramid is essentially four triangles with base length 21.5 feet and height 13.4 feet, we can calculate the area that they take up with the formula 4\cdot \frac{13.4\cdot 21.5}{2}=576.2 square feet. Hope this helps!

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