MATHEMATICS MIDDLE SCHOOL

What does k equal in kx+2y=k; if (2,-2)

Answers

Answer 1
Answer: k(2)+2(-2)=k
2k-4=k
+4 +4
2k=k+4
-k -k
K=4
Answer 2
Answer:

Simplify both sides of the equation

k(2)+(2)(-2) = k

Simplify

2k-4 = k

Subtract k from both sides

2k-4-k = k-k

k-4 = 0

Add 4 to both sides

k-4+4 = 0+4

k = 4

I hope that's help !

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Corey needs 24 boards that are 47 1/2 long. How many feet of boards should he buy

Answers

1. 
(24 * 47.5) / 12 = ? 

2. 
8 * 12 = 96 inches 

96 / 47.5 = 2.02 

He can get two 47.50-inch lengths out of each 8-foot board. So he needs 12-foot boards. 

In elses orchard 70% of the trees are apple trees . The rest of the trees are plum trees. What fraction of the trees are plum trees?

Answers

The rest would be 30%

Because 30%+70%=100%
30% of the trees are Plum Trees, because 30%+70%=100%

Hope this helps.

9) How many pounds would a 180 pound earthman weigh on the moon?(Hint!! For every 100 pounds a man weighs on earth he weighs only 16 poun
the moon).​

Answers

Answer:

28.8 pounds.

Step-by-step explanation:

By proportion he would weigh@(16/100) * 180

= 0.16 * 180

= 28.8 pounds.

Answer:

I believe the answer would be 28.8lbs

Step-by-step explanation:

100/16=6.25

80/6.25=12.8lbs

+16=28.8lbs

What is 965.38 rounded to the nearest tenth?

Answers

965.4 because .38 is in the hundredth place so you round the three. Any number greater than 5 will bump up the number before it. So eight bumped 3 up to 4.
965.4 thats the answer

How can i use models to relate fractions and decimals?

Answers

You can make visual (model) witch helps you see what you are doing
you can use different colors
 

How many edges does a rectangular prism have?
6
8
10
12

Answers

A retangular prism has 12 edges
The answer is 12. Look at the picture below, for more information. I hope this helps!
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