MATHEMATICS MIDDLE SCHOOL

Which associations best describe the data in the table?Variable j 2 4 6 3 7 9 1 5 8
Variable k 48 43 33 46 20 6 52 40 18

Choose exactly two answers that are correct.

A.
linear association

B.
negative association

C.
nonlinear association

D.
positive association
Which associations best describe the data in the table? Variable - 1

Answers

Answer 1
Answer: This one is a little more difficult B. is definitely one of them  and then id say A. linear.

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For a chemistry lab, you used 2 ounces of calcium sulfate, 2.5 pounds of copper, and 1/4 lb of nickel. What was the combined weight of your materials?

Answers

What you want to do is convert all your amounts to ounces. 
There are 16 oz in a pound. 
So for the copper do this equation.
2.5*16=40
This means there are 40 oz of copper.
Do the same with nickel.
0.25*16=4 oz
This means you have 4 oz of nickel. 
Combine the numbers:
2+40+4=46
Your answer will be 46 oz of material. 
Hope this helps!

The correct answer is:

2 oz + 2.5 lb + 1/4 lb =

2 oz + 40 oz + 4 oz = 46 oz =

2 lb and 14 oz.

This answer is if you want it in pounds and ounces.

Round the following numbers to 2 decimal places 0.273
1.595
6.473
2.571
0.425
44.5564
82.3643
325.1741

Answers

Before I give you the answers, there is a simple rule to observe when rounding a number to two decimal places. If the number in the third decimal place is less than five, then the number in the second decimal place stays the same. If the number in the third decimal place is five or greater than five, the number in the second decimal place is incremented by one. In our case the above numbers are rounded up as follows:

0.273 is rounded up to 0.27
1.595 is rounded up to 1.60
6.473 is rounded up to 6.47
2.571 is rounded up to 2.57
0.425 is rounded up to 0.43
44.5564 is rounded up to 44.56
82.3643 is rounded up to 82.36
325.1741 is rounded up to 325.17

What is the value of x?6([-3]-x)-2x=14

Answers

Multiply 6 (-3-x) to get -18-6x.
So now we have -18-6x-2x=14.
Simplify that to -18-8x=14.
Add 18 on both sides.
Now we have -8x=14+18.
-8x=32
Divide by -8 on both sides.
We get x=-4.
x= -4___________________________

If the roots of a quadratic equation are real,irrational,and unequal,the discriminant could have a value of1)1
2)0
3)8
4)-6
Help me out guys.

Answers

Answer:

8

Step-by-step explanation:

The condition for the discriminant b² - 4ac is

If b² - 4ac > 0 then roots are real, irrational and unequal

If b² - 4ac > 0 and a perfect square, roots are real, rational and unequal.

Thus

b² - 4ac = 8

Answer:

3) 8

Step-by-step explanation:

Real and unequal:

B² - 4AC > 0

Irrational: B²-4AC not a perfect square

Complete 2x+21= using only the communtative property of addition​

Answers

Answer:

-9.5

Step-by-step explanation:

2x + 21 =

2x + 20 = 1 (C.P)

2x = 1-20

2x = - 19

x= - 19/2

x = - 9. 5

Write the product as a mixed number 5*3/4

Answers

When you 5*3/4= 3.75 so 3 3/4 is your answer
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