MATHEMATICS MIDDLE SCHOOL

What is the value of 9(n+2)−5n for n=14?
3
9
10
19

Answers

Answer 1
Answer: If you want to know the value of a  function, you need to substitute the variable (here n) for the value:

so in the function

9(n+2)−5n

we substitute n with 14:

9(14+2)−5*14

first calculate the inside of the bracket:


9*16−5*14

9 times 16 is 144

144-5*14

5*14 is 70, so we have

144-70=74

so the answer should actually be 74!

Perhaps you mistyped the questions? can you check it again, please?

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Ellen needs to buy 180 inches of ribbon to wrap a large present. The store sells ribbon only in whole yards. How many yards does Ellen need to buy to have enough ribbon?

Select all the equations equivalent to 3x+5(-4x+12)-(x-3) A. -18x+63 B. 18x-63 C. 3x-20x+60-x+3 D. 3x+20x+60-x-3 PLEASE help the paper is due tomorrow mourning and i have a lot more to do!

Answers

A is an answer  C is an answer 
A. -18x+63
C. 3x-20x+60-x+3
Are your correct answers because they are equivalent to  
3x+5(-4x+12)-(x-3).

You have a piece of wood that is 7 3/4 feet long.  You want to cut one piece that is 3 7/12 feet long and one piece that is 4 1/12 feet long.  Do  you have enough wood? Explain.

Answers

3\frac7{12}+4\frac1{12}=7\frac8{12}\n \n 7\frac34=7\frac9{12}\n\n 7\frac8{12}<7\frac9{12}\n\n Answer:I\ have\ enough\ wood.
7 (3)/(4) - (3 (7)/(12) + 4 (1)/(12) ) = 7 (3)/(4) - 7 (8)/(12) = 7 (9)/(12) - 7 (8)/(12) = (1)/(12)

yeah , enough ...

The ratio of boys to girls in Mr. Bakers social studies class is 2 to 3. If there are 30 total students in the class how many more girls are in the class than boys?

Answers

There are 6 girls more than boys if the ratio of boys to girls in Mr. Bakers' social studies class is 2 to 3.

What is an arithmetic operation?

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has basic four operators that is +, -, ×, and ÷.

It is given that:

The ratio of boys to girls in Mr. Bakers' social studies class is 2 to 3.

From the question:

2 + 3 = 5 parts

= 2/5  Boys

= 3/5 Girls

30(2/5) = 60/5 = 12 Boys

30(3/5) = 90/5 = 18 Girls

18 - 12 = 6 girls are more than boys

Thus, there are 6 girls more than boys if the ratio of boys to girls in Mr. Bakers' social studies class is 2 to 3.

Learn more about the arithmetic operation here:

brainly.com/question/20595275

#SPJ2
2 + 3 = 5 parts
2/5  Boys
3/5 Girls

30 * 2/5 = 60/5 = 12 Boys
30 * 3/5 = 90/5 = 18 Girls

18 - 12 = 6 girls are more than boys

Are the ratios 3:1 and 16:4 equivalent

Answers

First, simplify the 16:4 ratio.
• 16:4 ÷ 2 = 8:2 ÷ 2 = 4:1

Now, check to see if they're equivalent:
• 3:1 = 4:1 ???
- 3:1 =/= 4:1

So, NO these ratios are not equivalent.
No they are not equivalent 16:4 is like dividing by 4 which is 4:1

is -.65 a rational or irrational number and why?

 

Answers

It's rational because the numbers don't go on forever after the decimal. pi is an example of irrational number because it continues forever
it is rational because rational numbers are numbers that can be put into fractions while irrational numbers are foreve going like pi

The gas tank in Michael's car can hold 18.0 gallons. If the tank currently contains 5.5 gallons, what fraction of the tank is full?

Answers

50/100= 1/2 hope that helped
In order to do this you need to know the equation Y=P% times X
You then put the info into the equation so P%= 5.5/18
P then is equal to P%=0.3056
Then you need to convert the decimal into a percent by moving the decimal between the 0 and the 5. Your answer is therefore 30.56% which you need to turn into a fraction. The proper fraction is 30 and 14/25 , the improper fraction is 764/25.
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