MATHEMATICS MIDDLE SCHOOL

There are 24 counters. How many counters could you add without having to regroup? why?

Answers

Answer 1
Answer:

Answer: There are 5 counters that can be added without having to regroup.

Step-by-step explanation:

Since we have given that

Number of counters = 24

We need to add without having to regroup.

It means that we should make it a prime number which does not get divided by any other number except 1 and itself.

so, After 24, there is other numbers that has chances are as follows:

25,26,27,28,29......

But except 29 all the other number can be regroup as they are composite numbers.

But 29 is the nearest prime number after 24.

So, 24+5=29.

Hence, there are 5 counters that can be added without having to regroup.
Answer 2
Answer: you can add 5 because 24+5= 29 and still being divisible by 5. if you add six you need to regroup 

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Alicia bought 4 T-shirts for $23.00. Using the unit rate, how much would 6 T-shirts cost?

Answers

Using the unit rate, the amount that the 6 T-shirts cost is $34.50.

First step is to calculate the unit rate

Unit rate=$23.00÷4

Unit rate=$5.75

Second step is to calculate the cost of the  6 T-shirts using this formula

Cost=Unit rate× Number of T-shirts

Let plug in the formula

Cost=$5.75×6

Cost=$34.50

Inconclusion using the unit rate, the amount that the 6 T-shirts cost is $34.50.

Learn more here:

brainly.com/question/11309044

Try finding what the amount for 1 t-shirt would be: 23 divided by 4. We get 5.75. What we can do next is multiply 5.75 by 2 since we're trying to find out the cost of 6 t-shirts, this gives us 11.5. So now we add 23 to 11.5. We get 34.5. This means that 6 t-shirts would cost $34.50

Mrs. Smith decides to buy three sweaters and a pair of jeans. she had $120 in her wallet. if the price of jeans is $45,what is the highest possible price (p) of a sweater, if each sweater, if each sweater is the same price? write, solve, and graph the inequality.

Answers

Answer:

3s+2j\leq $120. The sweaters cost $10 or less each. We graph it on a number line at 10 and use a filled in dot pointing towards zero for less than.

Step-by-step explanation:

Mrs. Smith buys 3 sweaters (represented by 3s) and 2 jeans (represented by 2j) for a total of at most $120. We don't know the total but we do know she couldn't spend more than $120.

We write 3s+2j\leq $120.

We know the jeans cost $45 each, so j=45. We substitute,

3s+2(45)\leq $120\n3s+90\leq $120

We solve for s by subtracting 90 to the other side and dividing the result by 3.

3s+90-90\leq 120-90\n3s\leq 30\n(3s)/(3)\leq(30)/(3)

s\leq 10.

The sweaters cost $10 or less each.

Solve 8 x -22 = -7 (x+1)

Answers

Answer:

x = 1

Step-by-step explanation:

8x - 22 = -7 (x+1)

8x - 22 = -7x - 7

15x = 15

x = 1
8x - 22 = -7x - 7
Add -7 on both sides and you’ll get 15x - 22 = -7 add 22 on both sides and you’ll get 15x = 15 and you’ll get x= 1

cassie draws 1 line to cut a square into two smaller shapes. which could NOT be the two smaller shapes?

Answers

They could ONLY be triangles, rectangles, or nameless quadrilaterals. They couldn't be anything else.
trapezoids because no matter what way you place them it can not make a square

The set of the consecutive odd numbers 1, 3, 5, 7, ... , N has a sum of 400. How many numbers are in the set?

Answers


Well, we could try adding up odd numbers, and look to see when we reach 400. But I'm hoping to find an easier way.

First of all ... I'm not sure this will help, but let's stop and notice it anyway ...
An odd number of odd numbers (like 1, 3, 5) add up to an odd number, but
an even number of odd numbers (like 1,3,5,7) add up to an even number.
So if the sum is going to be exactly 400, then there will have to be an even
number of items in the set.

Now, let's put down an even number of odd numbers to work with,and see
what we can notice about them:

         1, 3, 5, 7, 9, 11, 13, 15 .

Number of items in the set . . . 8
Sum of all the items in the set . . . 64

Hmmm.  That's interesting.  64 happens to be the square of 8 . 
Do you think that might be all there is to it ?

Let's check it out:

Even-numbered lists of odd numbers:

1, 3                                   Items = 2, Sum = 4
1, 3, 5, 7                           Items = 4, Sum = 16
1, 3, 5, 7, 9, 11                 Items = 6, Sum = 36
1, 3, 5, 7, 9, 11, 13, 15 . . Items = 8, Sum = 64 .

Amazing !  The sum is always the square of the number of items in the set !

For a sum of 400 ... which just happens to be the square of 20,
we just need the first 20 consecutive odd numbers.

I slogged through it on my calculator, and it's true.

I never knew this before.  It seems to be something valuable
to keep in my tool-box (and cherish always).

HOW MANY TENTHS ARE IN 13.58

Answers

5 tenths, because look at this:

13.58. Tenths is after the decimal. Hope this helps!

There are 135.8 of them.
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