Please help me with 3 7th grade math problems!?

Question

Okay please don't tell me "You needa do your own work" Because I have tried and dont get it!

I'm copying directly from the book.

1. Write a word problem for the numberical expression 3(4 + 3) + 2. Then simplify the expression.

2. Use the digits 1-9 in order. Insert operation signs and grouping symbols to get a value of 100. (I have tried MANY MANY MANY times and can get as close as 98 and 101.)

3. Which set of grouping symbols makes the equation true? 2 X 3 + 5 - 2 X 2 = 12
A.(2 X 3) + 5 - (2 X 2)
B. 2 X [3 + (5 - 2)] X 2
C.2 X [3 + (5 - 2 X 2)]
D.2 X ( 3 X 5) - 2 X 2

THANK YOU SO MUCH!

See I REALLYYYYY don't get number 3 because none of them make the statement or whatever true, and there is no "none of the above"

With number two what do the *'s mean??

Ahhh, I'm sorry I misscopied it from my book. It is + instead of X

Okay so my last problem is which expression gives the area of the garden?
And area is length X width correct?

Answer 1

Rather than just give you the answers, I'll try to help you through them. That way you can learn.

#1: (the easiest?)
pick anything that occur 3 times and that can have 2 parts or characteristics, like:
days of morning hours and afternoon hours
people with shirts and pants
houses with males and females
Now make a question involving 3 of the (left) items with 4 of the first part and three of the second part.

#2: its a trick question. Work the largest numbers first, then the smaller ones. When you find the solution, write it in a low to high format. (You will get it on the first try.)

#3: do the math for each possible answer... What do you get?
does one of the equal 12?

post your work here (use add detail) and we will help you over rough spots.

edited:
#3: if you think all are wrong, double check your work. If you are sure, just write 'none' and SHOW YOUR WORK. It will show incentive and teachers make mistakes too.

'last question': "And area is length X width correct?"
Yes, it is correct.


p.s. Why does everyone here just give homewok answers instead of helping the person figure it out. Do you all have something against learning?

Answer 2

1. A number is 2 more than 3 times the sum of 4 and 3. Find the number, which is 3(4 + 3) + 2 = 23.

2. [1(-2)+3*4](5)(-6+7-8+9)

3. none

Answer 3

You should get some tutoring.

There are 6 groups of people. 3 groups have 4 people each and 3 groups have 3 people each. Then, 2 more people arrive. How many people are there total?

1 2 3 4 5 6 7 8 9... okay, wait. I don't see why you need to do this, it's pretty dumb

I got it though! :D

(1+2+3)*4+5+6+7*8+9 (2nd one, btw)

3) Um.... none of the above?

Answer 4

1.......John wants to plant shrubs in his front yard. Under his 3 windows. He likes shrubs that cost 4 dollars, and others that cost 3 dollars. Plus some peat moss to add to the holes he digs will cost 2 dollars.
How much will he spend to put two different shrubs under all windows and add peat moss?
3 (4+3) +2 = ?
(3 x 7) + 2 = ?
21 + 2 = 23 dollars.

2......
1 2 3 4 5 6 7 8 9 (hmmm I'm working on it now)

(1+2+3+4+5) 6 - 7 +8+9 = 100


3. None of those choices, but this one works:
2 (3+5) - (2x2) = 12 which is a small change to choice D.
I think you have misscopied D from your book to this question, because in D, the + has changed to a X. Double check your original, please?
=
4. yes, length x width = garden area in square units.

Answer 5

1. 3 times the sum of 4 and 3, added to 2. (Answer: 23)
2. 1 +2+3+4+5+6+7+ (8x9)...simplified, this is 28 plus 72...which equals 100.
3. Since you explained that you misscopied choice D, then the answer is (revised) D: 2x(3+5) - (2x2).
4. Yes, area is length times width.

Good luck, girl! I'm rooting for ya!

Answer 6

Here is the first one:

Triplets Jack, Jill, and Jimmy-Bob are selecting fruit to go into a gift basket for their grandmother. Each choses four of their favorite red fruits and three of their favorite orange fruits. While wrapping the basket their mother adds two yellow bananas. How many fruits were in the final gift basket?

3(4+3)+2 = 3(4) + 3(3) + 2 = 12+9+2 = 23

Answer 7

answer for number 2 is

1+2+3+4+5+6+7+(8x9)

im not sure about the other ones though

Answer 8

1. You're mixing ingredients together for a recipe. You need 4 oz. of milk and 3 ounces of water for each serving and you want to make 3 servings. Then you want to add 2 ounces of sugar - regardless of how many servings you're making. What's the smallest container size you need to mix this recipe? Write an expression for this.

Answer: 3(4+3)+2 This equals 23 oz.

2. 1+2+3+4+5+6+7+8x9=100 (* are another symbol for multiplication, often used on computers - my bad!). :)

3. 2x3+5-2x2=12
A. (2x3)+5-(2x2)=7
B. 2x[3+(5-2)]x2=24
C. 2x[3+(5-2x2)]=8
D. 2x(3x5)-2x2=26 <---- It has to be 2x(3+5)-2x2 That = 12

The book has an error. :)

Answer 9

i know number 3 is a.