You can multiply 5 by 0.80 to get 4.
you can prove this by showing that (4/5)x100%=80% (4/5=0.80)
Answer:
<u>x= -7 , y= 9</u>
Steps:
4x+3y=-1
5x+4y=1
First, multiply the top equations by -5, and the bottom by 4 to get :
-20x-15y=5
20x+16y=4
Then, you’re going to add the two equations with them being on top of each other so you can easily see what cancels out :
-20x-15y=5
+ 20x+16y=4
———————
0+1y=9
From this, you get :
y=9
Now that you have one variable, find x by substituting 9 for y in one of the equations, I choose :
4x+3y=-1
So :
4x+3(9)=-1
Then simplify by multiplying 3 and 9 :
4x+27=-1
Then subtract 27 on each side :
4x=-28
Then, divide by 4 to get that :
x= -7
Hope this helps!!
Answer:
x = 7
Step-by-step explanation:
the smallest common denominator between 2 3 and 6 is 6. Multiply the original equation by 6
- 6(x/3 + x/6 = 7/2)
- 6(x / 3) = 2x
- 6(x/6) = x
- 6(7/2) = 3*7 = 21
Result
- 2x + x = 21
- 3x = 21
- 3x/3 = 21/3
- x = 7
Check
- 7/3 + 7/6 = 7/2
- 14/6 + 7/6 = ? 7/2
- 21/6 =? 7/2
- 21/6 = 3.5
- 7/2 = 3.5
Answer: x = 7
Answer:
70
Step-by-step explanation:
The area of one of the four triangles is . So together the area of all the four traingles is
The answer is :
<span>A. Always
Also </span>
<span>If
two equations have different slopes but equivalent y-intercepts, they
will have one solution and that will be the point where the y-intercept
is. If two equations have different slopes and different y-intercepts,
then there will be one solution where those two lines meet. If two
equations have the same slope but different y-intercepts, the lines will
be parallel, and there is no possible intersection point. And if two
equations have equal slopes and equal y-intercepts, these lines will
have an infinite amount of solutions, because if the equations are one
the same line, every single point on that line is a solution to the
system. </span>