MATHEMATICS HIGH SCHOOL

3. What is the simplest way to write3a + 2b - 3a + b? Briefly show or explain your
reasoning.

Answers

Answer 1
Answer:

Answer:

3b is the answer

3a+2b-3a+b

3a-3a+2b+b

2b+b

Step-by-step explanation:

The first step I did is switch up the equation so that the like terms are next to each other. So the a’s are next to each other and the b’s are next to each other. Then I subtracted 3a-3a and got 0 and in the last step I added the 2b + b and got 3b.

Answer 2
Answer:

9a^2- 4b^2

First, Apply the distributive property 3a(3a)+3a(−2b)+2b(3a)+2b(−2b)

Second Simplify the term. 3a(3a)+2b(−2b)

Third, Simplify Each term.

3⋅3a2+2b(−2b)

9a2+2b(−2b)

9a2+2⋅−2b2

= 9a2−4b2

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If 0.05x=20 then x=

Answers

0.05x=20
-------- -------
0.05 0.05

×=400
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David rowed a boat upstream for three miles and then returned to point he started from. The entire journey took four hours. The speed of the stream is one mile per hour. Find David's speed in still water. (Hint: speed = distance ÷ time, upstream speed = speed of the boat – speed of the stream, and downstream speed = speed of the boat + speed of the stream) David's speed in still water is ____ miles per hour.

Answers

To solve for the time it takes to travel a certain distance at a certain speed, use the formula,
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                              total time = time upstream + time downstream

                                         4 = 3/(x - 1) + 3/(x +1)

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There+are+no+rational+numbers+that+are+also+whole+numbers

Answers

actually all the whole numbers are kind of rational numbers like : 1/1 , 2/1 , 3/1 , ...
so there are some rational numbers that are whole numbers too :))
i hope this be helpful 
have a nice day 
No. ALL whole numbers are rational. And what's with all the plus signs ? ? They really make your questions hard to read.

A window shaped like a parallelogram has an area of 18 squareReet. The height of the window is 3 feet. How long is the base of
the window?

Answers

Answer:

Step-by-step explanation:

area of parallelogram = b times h

18/3 = 6 feet

With two number cubes, what is the probability of rolling a sum of a 9?

Answers

7 out of 11 is the probability of rolling a 9

7wk is less than 52days

Answers

Yes,there is 7 days in a week,so you can multiply 7 days by 7 weeks..So 7*7=49.
So 49 days is less than 52 days.
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