Answer would be A- 6x+20 his siters gift is x, (x)6=6 x
moms gift and wifes gift are each a (2x) than his two (2x) and 2(x's) = 6x.
2x+2x+x+x=6x, so now 6x+20 equals total ammount spent (total budget)
Answer: y=4, x=-2
Step-by-step explanation:
line r must have the equation y=4 to go through point (-2,4)
line s must have the equation x=-2 to go through point (-2,4)
Here is the equation to solve the problem above:
f(x) = (7-x)^3
y = (7-x)^3
switch y and x
x = (7 - y)^3
third root of x = 7 - y
-y = 3rootx - 7
so:<span><span>f′(x)=3^<span>√x</span>−7</span></span>