5sqrt(x+7)=-10
Dividing both sides by 5:
5sqrt(x+7)/5=-10/5
sqrt(x+7)=-2
Squaring both sides of the equation:
[sqrt(x+7)]^2=(-2)^2
x+7=4
x+7-7=4-7
x=-3
Replacing in the original equation:
5sqrt(x+7)=-10
5sqrt(-3+7)=-10
5sqrt(4)=-10
5(2)=-10
10=-10 It's not equal, then x=-3 is an extraneous solution
Answer:
Equations can have many solutions. The equation of a straight
line, for example, defines all points on the line. Even a simple
equation such as x+y=5 can have a variety of solutions (x=1 when
y=4, x=2 when y=3 and so on)
The first one is false and the second one is 1.5 2 is the outlier
To find how much money Larry saved, you will create an equation in terms of X, the amount Larry has saved.
x (Larry's savings) + 112x (Barry's savings) + 113x (Terry's savings) = 322
226x = 322
X = $1.42
Berry has saved about $1.42.
