MATHEMATICS MIDDLE SCHOOL

1/2 = ?/10


PLEASE PLEASE HELP!!!!!!!!!!!!!!

Answers

Answer 1
Answer: Ok, what I do is double or do × 2 to the numerator and the denominator so since they already put the 10 as a denominator, I am going to see ___ ×2=10 and to figure that out I am going to see how many times 2 goes in to 10 so it goes in there 5 times so 5×2=10 and now, I am going to do the same thing with my numerator to find out what the ? equals to so 5 × 1 ( which 1 is the numerator of 1/2) equals 5, so 1/2 is equal to 5/10
Answer 2
Answer: 10 divided by 2 is 5. 
so do 5 times 1. that is 5 your answer is 5/10

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~~~30 POINTS~~~
Please answer this math question!

Answers

With a dilation, each dimension increases by the factor.  Thus, if we let the dimensions be x and y, the new dimensions are 2x and 2y.

(a): The original perimeter is 2(x+y), but the new one is 2(2x+2y).  This is twice the original perimeter, so it is 18*2=36.

(b): The original area is xy, and the new one is (2x)(2y), or 4xy.  This is four times the original area, or 20*4=80.

(c): As it's given that the side lengths are integers, the intended solution is most likely to divide by 2 in the perimeter to see that the sum of the side-lengths is 9 and their product is 20.  Guessing/checking values for each side, we see that 4 and 5 work for the smaller rectangle.  Multiplying by two, the larger one has lengths 8 and 10.

Alternatively, we set them to x and y and use the equations:
x+y=9
xy=20

Dividing by y, we see that x=20/y.  Substituting, we have that y+20/y=9.  Subtracting 9 and multiplying by y, we have:

y^2-9y=20

Factoring, we have (y-5)(y-4)=0.  The solutions to this equation are 4 and 5, which result in x=5, y=4 or x=4, y=5 respectively.  Thus, we see that 4 and 5 are the side-lengths.  Note that this solution did not require the assumption that the side-lengths are integers!

The temperature in Bloomington on Sunday was 32.6°C. On Monday, the temperature changed by -8.25°C. What was the temperature on Monday?

Answers

24.35 C
just subtract 32.6 - 8.25

Answer:

24.35 C

Step-by-step explanation:

The table can be used to determine the solution of equations, 2x − 2y = 6 and 4x + 4y = 28.A table with 6 columns and 2 rows. The first column, Original System has 2 x minus 2 y equals 6 and 4 x plus 4 y equals 28. The second column, Equivalent System, has 4 x minus 4 y equals 12 and 4 x plus 4 y equals 28. The third column, Sum of equations in Equivalent System, has 8 x equals 40. The fourth column, Solution to System, is blank. The fifth column, New System Using Sum, has 4 x plus 4 y equals 28 and 8 x equals 40. The sixth column, Solution to New System is blank.

Which solution can be used to fill in both blanks in the table?

(2, 5)

(5, 2)
(5, −8)
(−8, 5)

Answers

Answer:

(5,2)

Step-by-step explanation:

2x-2y=6\n4x+4y=28

Column 1 :

2x-2y=6..........(1)\n4x+4y=28........(2)

Column 2 :

Eqn(1) *\ 2

4x-4y=12\n4x+4y=28

Column 3 :

Add the equations.

(4x+4x)-4y+4y=12+28\n8x=40

Fourth column :

8x=40\nx=(40)/(8)=5

Fift column :

4x+4y=28\n8x=40

Sixth column :

Substitute x=5.

4* 5+4y=28\n4y=28-20\n4y=8\ny=2

Hence solution is (5,2).

Answer:

I'm terrible at explaining so here's a screenshot

- Ripper

Step-by-step explanation:

There were 4 people in the room. Each has 3/5 of a bottle ink left. How many markers worth of ink were there in the room

Answers

To answer this you would just multiply 4*3/5 because 4 people have 3/5 ink left. The easiest way to do that is change 3/5 into a decimal.
3/5 = 0.6
4*0.6 = 2.4
So, there are 2.4 markers worth of ink in the room.
Hope this helps!

What number has the same value as 14 tens?

Answers

14 tens is equal to 140, and here's why:

14 times 10 is 140,
that's like adding 14 tens to each other

What are the zeroes of f(x) = x2 - 2x - 3?x= -3,1
x= -3, -1
X= 3,1
x=3, -1

Answers

Answer:

{-1, 3}

Step-by-step explanation:

Please use " ^ " to denote exponentiation:   f(x) = x^2 - 2x - 3.

To find the zeros of this quadratic, set it equal to zero first:

f(x) = x^2 - 2x - 3 = 0.

Now factor this result:  (x - 3)(x + 1) = 0.

The zeros are {-1, 3}
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