MATHEMATICS MIDDLE SCHOOL

What is the LCD of 2/3, 4/5, and 7/10?
A.30
B.18
C.15
D.10

Answers

Answer 1
Answer: The Prime Factorization of 3,5,10 is:

3 = 1 x 3
5 = 1 x 5
10 = 2 x 5

Lets Multiply it:
We already have a 5, so we can only use one of the fives.

1 x 1 x 2 x 3 x 5 = 30 

the answer is 30
Answer 2
Answer:

The Prime Factorization of 3,5,10 is:

3 = 1 x 3

5 = 1 x 5

10 = 2 x 5

Lets Multiply it:

We already have a 5, so we can only use one of the fives.

1 x 1 x 2 x 3 x 5 = 30  so 30 is the answer.

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Last year there were 381 students at Woodland middle this year there are 419 students. What is the percent of change?

Answers

The percent of change is 10%

What is the place value of the 5 in 5,675.321

Answers

The value of the 5 in 5,675.321 could be either five thousands or 5 ones...

Not sure which one so I put both... hope this helps. Let me know if not and / or you need any more help. :)

The value of 5 is Millions.

To help I will define all the numbers for you to help better understand.

5 is million, 6 is hundred thousands, 7 is ten thousand, 5 is thousand, 3 is tenths, 2 is hundredths, 1 is thousandths.

Suppose y varies directly with x. If y = -2 when x = 1, what is the value of x when y = 4?

Answers

Answer:

When x = 1, y = -2

When y = 4 = -2 x -2

Therefore x = 1 x -2 = -2

Hope this helps!
x = 6 i think. not too sure never had this type of question before

The equation shows the relationship between x and y:y = 7x + 2

What is the slope of the equation?


-7
-5
2
7

Answers

y=mx+b is the formula.
m is the slope and b is the y-intercept.

y-intercept is when x is 0 and x-intercept is when y is 0. So if x is 0, y=m(0)+b which is y=b. So on the graph y will be b when x is 0.

So in y=7x+2, 7 is the slope and 2 is the y-intercept.

\sf\ Slope:\ {\boxed{7}


y={\underbrace{m}x+{\underbrace{b}
\sf\~~~~SLOPE~~~~~Y-INTERCEPT
Below is the slope intercept form:
y = mx + b

where: m = slope; b = y-intercept.

Using the above format, 

y = 7x + 2

m = 7 ; b = 2

The slope of the equation is 7.
The y-intercept of the equation is 2.

What type of correlation is shown in the scatter plot? A.
no correlation

B.
positive correlation

C.
negative correlation

Answers

A. No correlation. This is the answer because there is no way here to detect a negative or positive correlation.
No correlation.  The results are not like,  tipped one direction or the other.  There is no correlation between x and y

Simplify 4 + (-3) -2 x (-6)

Answers

Answer:

4 - 3 - 2 x -6

do the multiplication first

4 - 3 - (-12)

4 - 3 + 12

=13

hope it helps :)

Hopethiswillhelpu.....
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