Help?!?!Amanda is trying to determine the typical mass of eggs that are produced by each of her chickens. Which of the following will give her the most accurate measurement?

A. Take the chicken with the average weight, and determine the average mass of all the eggs laid by that chicken after a few months.
B. Take a random sample of chickens, and determine the average mass of 20 random eggs laid by those chickens.
C. Take a random sample of eggs from each chicken over a few months, and determine the average mass of all the eggs.
D. Take a random sample of eggs from each chicken over a few months, and determine the average mass from each sample of eggs.

Answers

Answer 1

Answer: its d as then you have more accurate measurings than the others

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1) 5x-2y=4. 2) 3x-5y=13 x-2y=5
3x+y=9

Answers

$\left\{\begin{array}{ccc}5x-2y=4\n3x+y=9&/\cdot2\end{array}\right\n+\left\{\begin{array}{ccc}5x-2y=4\n6x+2y=18\end{array}\right\n----------\n.\ \ \ \ \ 11x=22\ \ \ \ /:11\n.\ \ \ \ \ \ \ x=2\n\n3\cdot2+y=9\n6+y=9\ny=9-6\ny=3\n\nAnswer:x=2;\ y=3$

$\left\{\begin{array}{ccc}3x-5y=13\nx-2y=5\end{array}\right\n\left\{\begin{array}{ccc}3x-5y=13\nx=2y+5\end{array}\right\n\nsubstitute:\n\n3(2y+5)-5y=13\n6y+15-5y=13\ny=13-15\ny=-2\n\nx=2\cdot(-2)+5=-4+5=1\n\nAnswer:x=1;\ y=-2.$

Translate the word phrase into a variable expression. eight less than the quotient of x and 3
A.
3x – 8

B.
x3/-8

C.
x-8/3

D.
8-x/3

Answers

B quotient means divide so it is x/3 then 8 less means to subtract

Please help, I don't know the answer!

Answers

Answer:

C. 6*9^3 + 1*9^2 + 1*9^1 + 5*9^0

Step-by-step explanation:

In base 9, each digit to the left represents a power of 9.

The rightmost digit represents 9^0, the next digit to the left represents 9^1, the next digit to the left represents 9^2, and the 4th digit represents 9^3.

Answer: C. 6*9^3 + 1*9^2 + 1*9^1 + 5*9^0

How do you find a constant rate of change?

Answers

Answer:

Rate of change is most commonly defined as "the change in y over the change in x", or "how much does y change when x is changed by 1 unit".

Step-by-step explanation:

What is £300 divided into a ratio of 3:7

Answers

a) sum 3 + 7 =10
b) divide  £300 ÷ 10 =  £30
c) multiply:
3 x 30 =  £90
7 x 30 =  £210

Values are:  £90 and  £210

First you add the ratio together 3+7=10 Then you do £300 divided by 10 = £30
Then you do £30 X 3 (from the ratio in the beginning) which equals £90
Then you do £30 X 7 (also from the ratio in the beginning) which equals £210
The ratio is £90:£210
Also you can add the ratios up so that it equals £300 the number you started with
£90+£210=£300
Hope I helped :)

find an equivalent expression without parentheses -(50x-15y+15)=

Answers

-(50x-15y+15) = -50+15y-15

Answer:

-50x+15y-15

Step-by-step explanation:

hope this helps!

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