Answer:
a = 30
Step-by-step explanation:
a/ 50 = 3/5
Using cross products
a*5 = 50 *3
5a = 150
Divide each side by 5
5a/5 = 150/5
a = 30
Answer:
The value of y is 
Step-by-step explanation:
we have
-----> equation A
-----> equation B
To eliminate the x-variable and find the value of y Multiply the equation A by -18/4 both sides or multiply the equation B by -4/18 both sides
I choice
Multiply the equation A by -18/4 both sides
![(-18/4)[4x+3y]=6*(-18/4)](https://tex.z-dn.net/?f=%28-18%2F4%29%5B4x%2B3y%5D%3D6%2A%28-18%2F4%29)
------> equation C
Adds equation B and equation C
To find a common denominator, you would multiply the first number by 10 both top and bottom, to get 50/100. Now that they are both 100 at denominator, you can add 50 and 34 to get 84/100, or simplify that to 21/25.
<span>The solution for a system of equations is the value or values that are true for all equations in the system. The graphs of equations within a system can tell you how many solutions exist for that system. Look at the images below. Each shows two lines that make up a system of equations.</span>
<span><span>One SolutionNo SolutionsInfinite Solutions</span><span /><span><span>If the graphs of the equations intersect, then there is one solution that is true for both equations. </span>If the graphs of the equations do not intersect (for example, if they are parallel), then there are no solutions that are true for both equations.If the graphs of the equations are the same, then there are an infinite number of solutions that are true for both equations.</span></span>
When the lines intersect, the point of intersection is the only point that the two graphs have in common. So the coordinates of that point are the solution for the two variables used in the equations. When the lines are parallel, there are no solutions, and sometimes the two equations will graph as the same line, in which case we have an infinite number of solutions.
Some special terms are sometimes used to describe these kinds of systems.
<span>The following terms refer to how many solutions the system has.</span>
For 14, the answer is >. You inversed it. You are right about question 15.
