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Rudiy27
3 years ago
8

Computer purchases: Out of 809 large purchases made at a computer retailer, 347 were personal computers, 398 were laptop compute

rs, and 64 were printers. As a part of an audit, one purchase record is sampled at random. Round the answers to four
decimal places, as needed.

(a) What is the probability that it is a laptop computer?

(b) What is the probability that it is not a printer?​
Mathematics
1 answer:
Luda [366]3 years ago
6 0

Step-by-step explanation:

personal- 347 ÷ 809 = 0.43%

lap top- 398 ÷ 809 = 0.49%

printer- 64 ÷ 809 = 0.08%

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A student government organization is selling Christmas trees as a fundraiser. On Friday, they sold 5 noble fir trees and 3 dougl
Lana71 [14]

5 noble fir and 3 douglas fir = $ 420

12 noble fir and 9 douglas fir = $ 1080

Let noble fir be n,  and douglas fir be d.

5n + 3d = 420               ..............(i)

12n + 9d = 1080           ...............(ii)

Multiply equation (i)  by 3.

3*(5n + 3d) = 3*(420)

15n + 9d = 1260        .............(iii)

Equation (ii)  minus (iii)

(12n + 9d) - (15n + 9d) =  1080 - 1260

12n - 15n  + 9d - 9d = -180

-3n = -180

n = -180/-3 = 60

Substitute the value of n in (i)    5n + 3d = 420 

5*(60) + 3d = 420

300 + 3d  = 420
 
3d =  420 - 300 = 120

3d = 120

d = 120/3 = 40

Therefore Noble fir tree cost $60 while Douglas fir tree cost $40
5 0
3 years ago
What ordered pair is a solution of the equation y-3=5(x-2)
RideAnS [48]

Answer:

(0,-7)

Step-by-step explanation:

In this question, we need to find an ordered pair of (x,y)  

First we need to solve the equation for Y. It will be:

y-3=5(x-2)  

y=5x-10 +3

y= 5x -7

Then, using the equation you can find the value of y using the value of x. If x= 0 the calculation will be

y= 5x-7

y= 5(0) - 7

y=-7

The ordered pair will be: (0,-7)

3 0
3 years ago
Please help me on this
Readme [11.4K]

For this case we have to define root properties:

\sqrt [n] {a ^ n} = a ^ {\frac {n} {n}} = a

In addition, we know that:

a ^ {- 1} = \frac {1} {a ^ 1} = \frac {1} {a}

On the other hand:

4 ^ 2 = 16

Thus, we can rewrite the given expression as:

\sqrt {4 ^ 2 * a ^ 8 * \frac {1} {b ^ 2}} =\\4 ^ {\frac {2} {2}} * a ^ {\frac {8} {2}} * \frac {1} {b ^ {\frac {2} {2}}} =\\4 * a ^ 4 * \frac {1} {b}

ANswer:

Option B

3 0
3 years ago
Find the ratio of the following 1) 25to 35​
Ad libitum [116K]

Answer:

The ratio of 25/35 is

Step-by-step explanation:

25/35

=5/7 (both cut by 5)

So, your answer is 5:7

8 0
3 years ago
Read 2 more answers
How to simplify 4x^-3<br><br><br><br> Is the answer 1/4a^3 ?
Rudik [331]
The exponent only applies to the x not the 4
so only the x has permission to move to the denominator
this leaves you with 4/x^3
4 0
3 years ago
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