MATHEMATICS MIDDLE SCHOOL

Solve the equation
4.8y-6.9=3.18
Explain your thinking

Answers

Answer 1
Answer: 4.8y - 6.9 = 3.18 
4.8y= 3.18 + 6.9 (I added 6.9 to both sides)
4.8 y = 10.08 (I added 3.18 by 6.9)
y = 2.1 (I divided 4.8)

Hope this helps!!
Answer 2
Answer: the point of this equation is to figure out the value of the y variable. to do this, you'll need to get the y variable by itself on one side of the equation. 

so first you would add 6.9 to 3.18. 
the equation would now look like this: 
4.8y=10.08 


you would then divide 4.8 by 10.08. this is the last step to getting the y varible by itself on one side of the equation and ultimately the value of y! 
the equation now looks like this: 
y=2.1 

y=2.1 is you answer!
Good luck! 

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2x^3+17x^2+23x-42; 2x+7

How do I find the numerator and denominator?

Answers

you don't find it, they give it away. unless you mean that you want to simplify. use common factors
You don't find it so use common factors

Nolan practices the piano for 1 2/5 hours every Saturday and Sunday. How long does he practice each weekend?

Answers

Well, you would have to convert them into improper fractions. So, 1 2/5 is 7/5. Then, you would do 7/5 x 2/1 which gives you 14/5 which equals 2 4/5. Nolan practices for 2 4/5 hours each weekend.

In 2012 a survey found that 92% of people in the 18 to 29 age group used social networking sitesa.Express the percent as a rate per 100.
b.what is this percent written as a fraction

Answers

A)
That means 92 people out of 100 in the age group of 18 to 29 use social networking sites.

So as a rate, it would be 92 out of 100.
B)
\sf x%\sf =(x)/(100)

So then \sf 92% \sf= (92)/(100)
Percents are parts of 100, so we can write 92 as a fraction over 100.

92/100

Simplify:

23/25

How come Math is impotant??

Answers

It's used in everyday life, yes I know you think that this saying is cheesy because all teachers say it, but honestly I've learned it's true. For example you can calculate how much time you have for each kind of activity before leaving to school/work. Or maybe when your baking you just have to measure cups and such. Not only that, but some careers are based off of mathematics completely. So a better career and a lot of use in life.
Basically, everywhere you go, you will be able to do math. Such as the how long each block is, or how long it takes you to get from one place to another.

Math also helps us get out of problems or be able to do something good, such as cooking.

Which pair of parenthesis can be removed without changing the value of the expression?

Answers

The pair of parenthesis that can be removed without changing the value of the expression is "parenthesis around 5 × 8"

Given expression:

(1 + 2) × (6 - 3) + (5 × 8) + (9 - 4)

Using BODMAS

  • B = bracket
  • O = of
  • D = division
  • M = Multiplication
  • A = Addition
  • S = Subtraction

(1 + 2) × (6 - 3) + (5 × 8) + (9 - 4)

= 3 × (3) + 40 + 5

= 9 + 40 + 5

= 54

Remove parenthesis around 5 × 8

(1 + 2) × (6 - 3) + 5 × 8 + (9 - 4)

By removing the parenthesis around 5 × 8, you still have to multiply before adding according to the rule of BODMAS

Therefore, the pair of parenthesis that can be removed without changing the value of the expression is "parenthesis around 5 × 8"

Learn more about BODMAS:

brainly.com/question/24491237
C is the correct answer as it's multiplication, meaning it would be done first anyway.

How many different ways are there to rearrange the letters of the word EXAM, if you don't care if the results is a recognizable word

Answers

In this case, all letters are unique.

Start by holding the first letter:
E - XAM
E - XMA
E - MAX
E - MXA
E - AXM
E - AMX
So there are 6 combinations here.

Repeat for all 4 letters.

6 x 4 = 24

This is same as 4x3x2x1.

For 3 unique characters, it is 3x2x1.
For 5 unique characters, it is 5x4x3x2x1
And so on...
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