Answer:
x=7 and y=4
Step-by-step explanation:
I will use the elimination method:
Since the co-efficient of both y's are the same number but different signs we add the 2 equations to eliminate the y:
3x + y =25
+ + +
2x - y = 10
Simplify:
5x=35
Divide both sides by 5:
5x÷5=35÷5
Simplify:
x=7
Substitute this into either equation 1 or 2 ( I chose 1):
3(7) + y = 25
21 + y = 25
Subtract 21 from both sides and simplify to get y:
21+y-21=25-21
y=4
Therefore x=7 and y=4
Answer:
Step-by-step explanation:
Given:
This can be written as 
I'm not so sure about this answer, but i remember doing something similar to this. I think it's 3.
Respuesta:
Edad de Claudia = 5 años
Edad de María = 5 * 3 = 15 años
Explicación paso a paso:
Dejar :
Edad de Claudia = x
Edad de María = 3x
En 5 años :
3x + 5 = 2 (x + 5)
3x + 5 = 2x + 10
3x - 2x = 10-5
x = 5
Edad de Claudia = 5 años
Edad de María = 5 * 3 = 15 años
Answer:
B. x = -6
Step-by-step explanation:
A line with the equation, y = ¼, is a horizontal line. Therefore, the line that is perpendicular to it would be a vertical line, which can be represented by the equation, x = a. Where, a is the x-value or the point where the vertical line intersects the x-axis. This x-coordinate remains the same for every point on the vertical line.
Thus, since the perpendicular line passes through (-6, -9), therefore, the value of a = -6.
Thus, the equation of the perpendicular line would be:
x = -6
