MATHEMATICS MIDDLE SCHOOL

If martha has 20 apples and aaron eats 9 how many does she have left

Answers

Answer 1
Answer:

Answer: If martha has 20 apples and aaron eats 9

:- 20-9

She has 11 apples left
Answer 2
Answer: Martha then has 11 apples because 20-9=11

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2.75 + .003 + .158 =

Answers


2.75                             Answer is  2.911      

0.003                Make sure you line up the decimal points like shown in example

0.158

_________

2.911
the answer 2.911 you add 2.75
                                     +.003
                                      +.158
                                    ----------------
                                       2.911

You have 12 cookies. How many ways can the cookies be put equally on any number of plates ?

Answers

Answer:

5

Step-by-step explanation:

Two spherical chocolates are filled with a cream filling. The space inside one chocolate has a radius of 3 cm, and the other has a radius of 4.5 cm.How much more cream filling is in the larger chocolate than in the smaller chocolate? Use 3.14 to approximate pi and enter your answer to two decimal places.

Answers

so first find the volume of each then subtract

volume=4/3 times pi times r^3

rasius of smaller=3
4/3 times pi times 3^3
4/3 times pi timer 27
4/3 times 27 times pi
36 times pi
aprox pi=3.14
36 times 3.14
113.04=smaller

volume of smaller
4/3 times 3.14 times 4.5^3
4/3 times 3.14 times 91.125
381.51

subtract
381.51-113.04=268.47

the volume is 268..47 cm^3

0 A public beach in Arkansas charges non- residents $12 per day for a fishing license and $3.50 per day for live bait. Arkansas residents pay an annual fee of $174 plus $1 per day for live bait. How many days must both a resident and a non- resident use the beach in one year so that both pay the same amount? State whether the equation has one solution, no solution or infinitely many solutions. How do you know?

Answers

Non Residents:
f(x)= money in $ paid.
x=number of days.

f(x)=x(12+3.5)=15.5 x

f(x)=15.5x

Arkansas residents
f(x)=money in $ paid.
x=number of days.

f(X)=x+174

Now, we equate functions:

15.5x=x+174    (this is the equation)
15.5x-x=174
14.5x=174
x=174 / 14.5=12

Answer: the number of days is 12 days. The ecuation has one solution, because when I has solved it, I have had one solution.

Which classification best represents a triangle with side lengths 6cm, 10cm, and 12 cm?

Answers

We can sort out this triangle as a scalene triangle, that is, a triangle that has three unequal sides. It is also true that there are no equal angles for this type of triangles. If a scalene triangle has an angle of 90°, then this is called a right triangle. But this is not right triangle. Let's prove it:

We know that the Pythagorean Theorem establishes that:

 c^2=a^2+b^2 \n where \ a \ and \ b \ are \ the \ sides \ and \n c \ is \ the \ Hypotenuse \ that \ is \ always \ the \ greatest \ side

Therefore, we can say that:

a=10cm \n b=6cm \n c=12cm

Accordingly: 

12^2 \neq 10^2+6^2 \therefore \boxed{144 \neq 136}

In fact, this is not a right triangle.

Becky wants to fence in a rectangular play area for her dog. If she was 82 feet of fencing and wants the length of the play area to be 9 feet longer than its width then what should the dimensions of the play area be?

Answers

ok
fencing=perimiter
perimiter=L+L+W+W=2L+2W=2(L+W)
82=2(L+W)
divid eboth sides by 2 for ease of use
41=L+W


if she wants legnth to be 9 more than width, then
L=9+W
subsitute 9+W for L
41=9+W+W
41=9+2W
subtract 9
32=2W
divide 2
16=W

subsitute
L=9+W
L=9+16
L=25



the pen should be 25 feet by 16 feet
length= width+9    ----- Now we can substitute length with width!
Perimeter = 2(length) + 2(width)
Perimeter = 82
82= 2(w+9) + 2w
41 = w+ 9 + w
41-9 = 2w
32 = 2w
16= w    (now plug w into the equation for length)
length = 16 + 9 = 25

SOO... Dimensions = 16 x 25
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