Beryl calculated the total text messages sent by sophomores, juniors and seniors for a week using the matrix equation: Z = X + Y What are the values for the elements of this matrix? Z11 = z12 = z13 =
Answers
Answer:
z11= 523
z12= 714
z13= 468
Step-by-step explanation:
just did the assigment these are right
Answer:
first part is 1x3 and second part is
523
714
468
Step-by-step explanation:
just did it on edge
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A merry-go-round has a radius of 10 ft. To the nearest tenth of a foot, what distance does the merry-go-round cover when it rotates through an angle of 72°?For my first try, I got 62.9 as my answer, and it was marked wrong. I did this a second time, and got 12.6. I would like to check with anyone else to see if I got the answer right.The answers for this question were:62.9, 12.6, 25.1, or 125.7
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Find the product of (x − 3)2.
B. 60 inches to 76 inches
C. 64 inches to 72 inches
D. 52 inches to 84 inches
Answers
If the mean height of the population is 68 inches and the standard deviation is 4 inches, 99.7% of the population will have a height within ranges of; 52 inches to 84 inches.
What do you mean by standard deviation?
In statistics, Standard deviation is a measure of the variation of a set of values.
σ = standard deviation of population
N = number of observation of population
X = mean
μ = population mean
We know that at 99.7% the measurements would be within 2 standard deviations of the mean.
Mean of 68 inches
Standard Deviation of 4
The lower range = 68– 4(4)= 52 inches
The upper range = 68+ 4(4) = 84 inches
Thus, the option (D) 52 inches to 84 inches is correct after using the empirical Rule.
Learn more about standarddeviation :
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==>h=3*4=12
[68-12, 68+12] is the interval
Answer A
Answers
to x < -2? Explain your answers.
Answers
Answer:
See below.
Step-by-step explanation:
x < -2 means that x is any number that is less than -2.
Is -2 less than -2? Answer: No.
A number is equal to itself. A number is not greater than itself or less than itself.
When the solution to an inequality is x < -2, the only values of x that are valid are numbers less than -2. -2 itself is not a valid solution.
Answer:
Step-by-step explanation:
Hmmm ok so yes but i can not explain it
does the function represent growth or decay?
By what percentage does the population change each year?
Answers
Answer:
- 280
- function represent growth.
- 29 %
Step-by-step explanation:
Equation to calculate population size after time, t
P(t) = 280(1.29)^t
To find initial population size we will take t = 0
P(0) = 280(1.29)^0
= 280(1)
= 280
To find that function represent growth or decay
P(1) = 280(1.29)^1
= 280(1.29)
= 361.2
Its means that after a year population increases. Hence, function represent growth.
By what percentage does the population change each year?
(361.2 - 280 / 280) * 100%
= 29 %
Answer:
280
function represent growth.
29 %
B. y = 2x + 2
C. y = -2x + 1
D. y = -1x + 1
E. y = -3x + 1
Answers
Answer:
it would be C. y= -2x+1
Step-by-step explanation:
Y= mx+c
the c would be the y- intercept (0,1)
m is the slope the rise/run in this case the line seems to be going down which means there would be a negative sign you move 2 units down and one right the slope would be -2/1 which is -2
Answers
-- Machine-Y takes 2 minutes for 300 boxes . . . 2/300 = 1/150 minute per box.
-- 3/150 = 2/100 . . . In 3/150 second, they can make 5 boxes by working together.
-- They need to make 5 boxes (300/5) = 60 times.
-- They'll need to work for 60 times (3/150) minutes.
60 (3/150) = 180/150 = 1.2 minutes = 1 minute and 12 seconds.