Multiply x by four and add 1 to get y. 10 times 4 plus 1 is 41, 5 times 4 plus one is 21, 25 times 4 plus 1 is 101.
Answer:
1
Step-by-step explanation:
points:
(-10, -20) and (1, -9)
y-y1=m(x-x1)
m= (y-y1)/(x-x1)
m=(-20-(-9))/(-10-1)= (-11)/(-11)= 1
m=1
The correct answer is 7. You add five to both sides then divide by three and you get 7 for x
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