(x, 2.5) and (6, 4) If (x1, y1) and (x2, y2) satisfy xy = k, then x1y1 = x2y2. Find x or y as indicated.

a.x = 10.1 c. x = 12.4
b .x = 9.6 d.x = 3.6

Question

(x, 2.5) and (6, 4)  If (x1, y1) and (x2, y2) satisfy xy = k, then x1y1 = x2y2.  Find x or y as indicated.

a.x = 10.1                          c. x = 12.4  
 b .x = 9.6                          d.x = 3.6

ipwnbunnies · Answer

It's saying what would 'x' equal with the equation is true: x1*y1 = x2*y2

anonymous · Answer

explain

ipwnbunnies · Answer

$$2.5x = 6*4 $$

ipwnbunnies · Answer

You're given two sets of coordinates, (X1, Y1) and (X2, Y2).
Let's go with the first point.
X1*Y1 = k, where 'k' is some random number. (X2,Y2) must also be equal to k.
Therefore, X1*Y1 = X2*Y2

anonymous · Answer

If (x1, y1) and (x2, y2) satisfy xy = k, then x1y1 = x2y2.  Find x or y as indicated.
 
(4.5, y) and (12, 6)
a.
y = -2
c.
y = 16
b.
y = 0
d.
y = 12

anonymous · Answer

can you help me with this one

ipwnbunnies · Answer

Make an equation, and solve for the variable.

ipwnbunnies · Answer

.-.
It's the same type of problem. Read it. The two sets of coordinates still have to satisfy
X1*Y1 = X2*Y2

anonymous · Answer

i still dont understand

ipwnbunnies · Answer

It's the same thing I explained in the first question.

ipwnbunnies · Answer

(X1, Y1) = (4.5, Y)
(X2, Y2) = (12, 6)
X1*Y1 = X2*Y2
Can you make an equation now, by substituting. :3

anonymous · Answer

The wattage rating of an appliance is given as W, in watts, and varies jointly as the resistance, R, in ohms, and as the square of the current, I, in amperes. If the wattage is 36 watts when the resistance is 100 ohms and the current is 0.6 amperes, find the wattage when the resistance is 300 ohms and the current is 0.5 amperes.