MATHEMATICS MIDDLE SCHOOL

Write an equivalent expression for n * a using only addition.

Answers

Answer 1
Answer: There are two of them:

1).  (n * a) means  n + n + n + n + n + n + n + . . .      'a' times.

2).  (n * a) also means  a + a + a + a + a + a + a + a + . . .     'n' times.

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HELP ME PLEASEBased on your decision, answer these three questions: Who is responsible for the changes? What resources or materials are needed? When will the change occur? Write your answer in paragraph form, and include details to support your ideas.

Answers

Answer:

As city planner, I will be responsible for carrying out the plans. We will need to hire a construction company and road crews to build the roundabout. We will also need to purchase materials and equipment for digging up and repaving the road. The change will occur at the start of the year.

Step-by-step explanation:

2020e said so :D

Answer:

The committee I am part of and animal control will be responsible for implementing the change. We will need to hire veterinarians or get some to volunteer to do the spaying and neutering, and we will need to recruit volunteers to capture stray pets. We will also have to have places to carry out the operations. The program will go into effect at the start of the new year.

Step-by-step explanation:

Millie has a box of 1 hundred cubes. She also has a bag of 70 cubes. How many trains of 10 cubes can she make?

Answers

100 + 70 = 170

170 / 10 = 17

17, 10 cube trains
You can make 10 rows with 100 cubes, and you can also make 7 rows with 70 cubes, 10+7=17, the answer is 17.

A pentagonal-based prism is sliced horizontally by a plane parallel to the base. Which figure best represents the shape of a cross-section parallel to the slice?

Answers

Since a pentagonal based prism is sliced horizontally by a plane parallel to the base. So the figure must be similar to the base of the prism because it was sliced parallel to base. Since it is a pentagonal based prism, then the cross section is also pentagon in shape

 

3. (4 + 5) is how much more than 3•4 + 5 ?

Answers

(4 + 5) is greater than 3·4 + 5 by 8.

Step-by-step explanation:

  • Step 1: Value of (4 + 5) = 9
  • Step 2: Value of 3·4 + 5 = 12 + 5 = 17 (as per BODMAS rule)
  • Step 3: Find the difference between the two.

⇒ 17 - 9 = 8

3-3x^2+6+3x+1+4x+2x
combined like terms

Answers

Combining like terms must always be in descending order.

Start with the exponents.

As we see, there is no other exponents so we would leave it as such.

-3x^2

Progress on to the next greatest which are the variables.

Add all of the coefficients

4x + 3x + 2x = 9x

Lastly, move on to the single numbers.

Add them together as shown above, but this time there are no coefficients so it is just a matter of addition and subtraction

3 + 6 + 1 = 10

Therefore, the answer is:

-3x^2 + 9x + 10

Like terms are terms that are alike. 5x and 3x are like terms because they have a coefficient along with a variable. Like terms are terms that can be added together.

We are given:

3-3x^2+6+3x+1+4x+2x

Since the x^2 term can't be combined to anything, let's combine our x terms. Here is what we will combine:

3x+4x+2x = 9x

When combined, they equal 9x. So our expression is now:

3-3x^2+6+1+9x

Now, let's combine our regular numbers. We will be adding:

3+6+1=10

Now, our expression is even more simplified. We are left with:

-3x^2+9x+10

This is your final answer. Nothing can be combined further. Fun fact, this is in standard form and you will be using it in higher algebra.

What is the final balance for the investment? $1500 for 3 years at 10% compounded annually  A.$1625.00  B.$1875.00  C.$1996.50  D.$2110.50

Answers

the\ final\ balance:\n \nFB=1500\cdot(1+ (10)/(100) )^3=1500\cdot(1,1)^3=1500\cdot1.331=1,996.50\ [\$]\n \nAns.\ C
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