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amm1812
3 years ago
6

The three steps shown below were used to find an expression equivalent to 2/5 (15x- 30y) +10x

Mathematics
2 answers:
Solnce55 [7]3 years ago
8 0
The answer is B, because 6x + 10x= 16x. So, the answer would be 16x-12y, which is your second step.
polet [3.4K]3 years ago
5 0

Answer:

option B is correct

Step 1. 6x - 12y + 10x

Step-by-step explanation:

Given the expression: \frac{2}{5} (15x-30y)+10x

Using distributive property:  a\cdot (b+c)=a\cdot b + a\cdot c

Apply distributive property in the given expression we get;

6x - 12y + 10x

Combine like terms;

16x - 12y

Now, factor a number means to break it up into numbers that can be multiplied together to get the original number

4\cdot 4x - 4 \cdot 3y

4(4x - 3y)

Therefore, the expression could be used  step 1 as,   6x - 12y + 10x

Three steps are:

Step 1. 6x - 12y + 10x

Step 2. 16x - 12y

Step 3. 4(4x - 3y)


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Easy
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6 0
3 years ago
In jims class, 5 times has many students take the bus as those who walk. A total of 24 students walk or take the bus. How many m
lubasha [3.4K]
Take bus=5 times walk
b=5w
b+w=24
sub 5w for b
5w+w=24
6w=24
divide both sides by 6
w=4

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b=5(4)
b=20

bus-walk=20-4=16

answer is 16 more take the bus than walk
 
7 0
3 years ago
It takes about me 25 minutes to make out a test for a mathematics class how long will it take to make out test for all five of m
ira [324]

Answer:

125 minutes total.

Step-by-step explanation:

You do:

25 times 5

= 125 minutes.

6 0
3 years ago
Read 2 more answers
Help with all please
seropon [69]

a) First, draw a graph. The x axis should be numbered: 0, 1, 2, 3, 4, 5, 6, 7, 8. Each number is the last digit of the year. For each year, there is one average score that has to be plotted. Number the y axis of the graph from 0-600, by increments of 50, or something around there. Now, with each year (each x value) place the dot as high as the average score. Repeat with all years. DO NOT draw a line to connect them. A scatter plot is a bunch of points that are not connected.

b) Use the form (y2-y1)/(x2-x1) where (x1,y1) (x2,y2) are any two points from 2001-2006. It does not matter which points, pick any, and assign each of the numbers x1,y1 and x2,y2. Plug it in to the equation, and simplify. This is your slope, also called m. Now plug m into the equation y-y1=m(x-x1) where y1 and x1 are the x and y coordinates of any point from 2001 to 2006. x and y dont have values themselves, they stay there. Now distribute the m into the parenthesis, add y1 to both sides (to cancel it out on the left), and you should be left with the same equation, but now in y=mx+b form. B is where the line crosses the y axis, so put a point on the vertical axis where b is. M is your slope, so every time you go to the right one number, go up M numbers. Draw another point. Repeat this until you can connect these new dots into a line. This line should be on the same graph as your other points, but might not touch all of the scatter plot points. That's still okay, just leave it as is.

c) Find the point where x=6 (meaning the year is 2006) on your line. Find the average test score for that year by seeing where the point lines up along the y axis (draw a straight line from the point to the left to see, if you have to). Take that number and add 1m (the m is the number you used in step B) to it. This predicts what the average score might be after 1 (that's why the 1 is there) year. This is a predicted value, and might not be perfectly correct!! Write/record how close this new, predicted, score is to the actual number, 515, which can be found on the scatter plot.

d) repeat step C exactly as before (still use the year 2006) , but add 4m instead of 1m, to get the predicted score 4 years after 2006 (2010), instead of 1 year after (2007).

I hope I have been of some help! Best of luck!!! :)

3 0
3 years ago
If BE is parallel to CD, the. The value of x is: <br><br> A. 10<br><br> B. 6<br><br> C. 9
sveta [45]
Corresponding sides have the same ratio, so
  x/15 = 12/(12+8) = 3/5
  x = 15*3/5
  x = 9
4 0
3 years ago
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