MATHEMATICS MIDDLE SCHOOL

2x - 3 for x = 4 does anyone know the answer

Answers

Answer 1
Answer:

Answer:

Answer is 5.

Step-by-step explanation:

put x=4 in the given expression

2(4)-3

8-3

5 and we get the answer.
Answer 2
Answer:

Answer:

5 is your answer

Step-by-step explanation:

Yes, so first plug in 4 for x

2(4)-3

Then multiply 2x4 which is 8

8-3 is 5

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There are 30 flavors and you can mix up to 3 of them. How many flavor possibilities are there? You can't mix the same flavors more than once in one drink. Show your work.

Answers

^(30)C _(3) = (30!)/((30 - 3)!3!) \n = (30!)/(27! * 3!) \n = (30 * 29 * 28 * 27 * 26 * 25 * . . .* 3 * 2 * 1)/(27 * 26 * 25 * . . . * 3 * 2 * 1* 3 * 2 * 1) \n =5 * 29 * 28 \n =4060
There are 4060 flavor possibilities.

2 - 4 ( y + 4 ) = 2y + 16 solve for y

Answers

Answer:

y = -5

Step-by-step explanation:

To solve for a variable, take the following steps:

  • Distribute by multiplying into each term in the parenthesis
  • Combine like terms
  • Move terms across the equal sign using inverse operations

2 - 4 (y + 4) = 2y + 16            Distribute

2 - 4y - 16 = 2y + 16              Combine 2-16

-14 - 4y = 2y + 16                  Add 4y to both sides

-14 = 6y + 16                          Subtract 16 to both sides

-30 = 6y                                Divide by 6

y = -5

Which is greater 3/7 or 0.55

Answers

3/7 as a decimal is .4285 and so on.
This is obviously less than .55

The test scores for a group of students are shown. 87, 72, 98, 84, 72, 65, 72, 70, 58, 91, 81, 84
What is the mode of the scores?
A.
84
B.
78.8
C.
98
D.
85.5

Answers

Mode is the number that occurs most often. Out of those numbers, 72 would be the mode. But since that's not an option, I would say 84. 
the mode is 72 because 72 appears three times  and the others are shown twice but 72 isn't an answer and the only other one with the most often is 84 which appears twice so the answer would be A

Write a real word problem for equation x-75=200

Answers

Hm...

   The total amount of oranges in a store is 200. The store loses 75 oranges each day, for some mysterious reasons. Find the number of oranges the store loses each week. Let x represent that number.

      

Kate forgot how many papers she bought from Staples. She used up 200 and she has 75, how many does she have in total.

How is using mental math to add with decimals like using mental math to add whole numbers

Answers

The use of mental method to add with decimals is similar to the mental method we used to add whole numbers because the decimals number can also change to whole numbers.
This is the reason the mental method for both are similar. we can also use the same process for decimal numbers and whole numbers.

Answer:  Using mental math to add with decimals is like using mental math to add whole numbers because the actual thing is we are adding the place values in both the cases and they different as in case of whole numbers we start from the ones place but in case of decimal numbers we first separate it into whole numbers and decimals to add by using mental math separately, after solving the sum we write both parts together and that is the answer.

For example to add 4.50+9.20

Take after decimal portion separately 0.50+0.20=0.70

and 4+9=13

write together it becomes 13.70.

so 4.50+9.20=13.70.
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