MATHEMATICS HIGH SCHOOL

What does -4x + 9x equals

Answers

Answer 1
Answer: 5x
just think of it as -4 + 9 because the variables are the same

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Can you help me, I don't understand it....

Answers


Median is the average. I'm pretty sure interquartile is the biggest number out of the two. 

Add the numbers for the first semester up, then divide by the amount of numbers. Do the same for semester two, then pick the correct answer in the multiple choices... For example in semester one you'd divide the added amount by 5.

If i'm wrong i'd like anyone to let me know what I messed up in! :)

Solve by substitution. Show each step of your work.

2x + y = 7

3x + 5y = 14

Answers

Alright...simple...showing all steps.. ;)

You have the equations...

2x+y=7
and
3x+5y=14

To be able to even solve for any of the variables...multiply the equations by...2...and..3...

2x+y=7----*3--> 6x+3y=21
and
3x+5y=14-----*2--->6x+10y=28

Thus,

6x+3y=21
-
6x+10y=28

=========

-7y=-7

y=1

Now, plug y back into any of the original equations....we'll use 2x+y=7 in this case....

2x+(1)=7

2x+1=7
      -1  -1

2x=6

x=3

Thus, the point of intersection for these two equations is (3,1)

One number is 16 more than a second number. The sum of the first number and twice the second number is 139. What is the answer ?

Answers

Answer first number  = 57  second number = 41
x= 16 + y
x + 2y = 139

16+ y + 2y =139
16 + 3y =139
16-16 +3y = 139-16
3y = 123
3/3y = 123/3
y= 41

x= 16+y
x = 16+41
x= 57

Determine the area of triangle ABC with AC =5cm and height DB =30mm​

Answers

The answer to the question is 75mm^2 because the formula is half base multiplied by height

What is the midpoint of FB​

Answers

Answer:

3. 15. . 16..

If this answer helps you plz mark as brainlist..

Answer:

D or L is the midpoint

Step-by-step explanation:

9-6x+x2 el dos va al cuadrado resuelvan lo porfA​

Answers

Answer:

6

Step-by-step explanation:

do 9-6 then

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