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Viktor [21]
3 years ago
6

A number consists of two digit whose sum is five

Mathematics
1 answer:
Nataly [62]3 years ago
5 0

Answer:

23

Step-by-step explanation:

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A vending machine operator has determined that the number of candy bars sold per week by a certain machine is a random variable
docker41 [41]

Answer:

The answer is below

Step-by-step explanation:

Let Y represent the profit per day, and x represent the number of bar sold per day. Hence:

Y = 0.25x - 2

a) The mean is given as:

\mu_y=E(Y)=E(0.25X-2) = 0.25E(X)-2\\\\But\ E(X)=mean\ of\ machine=125. Hence:\\\\E(Y)=0.25(125)-2=29.25\\\\E(Y)=\$29.25

b) The standard deviation of y is:

\sigma_y=var(0.25X-2)\\\\\sigma_y=0.25\sigma(X)\\\\but\ \sigma_X=7,hence:\\\\\sigma_y=0.25(7)=1.75\\\\\sigma_y=\$1.75

6 0
3 years ago
Draw the figure with the vertices D(1, 1), E(1,−2), F(−2,−2), G(−2, 1) in the coordinate plane. Question 2 Find the perimeter an
Olegator [25]

Answer:

the answer is 6

Step-by-step explanation:

6 0
3 years ago
Can someone please help me gladly appreciate it !
Daniel [21]
It could be The 4.0 cm would be the base and 2.8cm would be the length upwards
5 0
3 years ago
How many 4' x 8' sheets of plywood are required to cover a floor that is 9 m by 16 m?
Xelga [282]
Assuming no border or waste, 9m by 16 m translates to 29.52' x 52.49'.
use 32/8=4 sheets of plywood to cover the width on the 8' side.
For the length, use 52/4=13 pieces on the 4' side.  
This gives a total of 4*13=52 sheets.
The extra 0.49' x 29.52 can be covered using the extra from the last four sheets for the width.

Check: 
Area to be covered: 29.52*52.49=1550 sq. ft.
Area of plywood supplied = 52*4'x8'= 1664 sq. ft, > 1550 sq.ft.
8 0
3 years ago
If x=4 and y=6, evaluate the following expression:<br> 100−3(3y−4x)
aliina [53]

100 - 3(3y - 4x) = 100 - 3(18 - 16) = 100 - 3(2) = 100 - 6 = 94

7 0
3 years ago
Read 2 more answers
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