Start with the general formula. The key word is difference. So the general formula is
D(x) = W(x) - R(x) Now substitute in the values for W(x) and R(x)
D(x) = 0.002x^3 - 0.01x^2 - (x^2 - 4x + 13) Be very careful about the sign in front of the brackets.
D(x) = 0.002x^3 - 0.01x^2 - x^2 + 4x - 13 Do you see what that minus sign did? It affected all 3 terms.
D(x) = 0.002x^3 - 1.01x^2 + 4x - 13 <em>Note: -0.01 - 1x^2 = - 1.01 x^2</em>
That gives you a clear cut answer
C<<<<< answer.
That sign is the worst part of the question. Make sure you understand what it did.
So 3/5 of boys had rockets
2/9 of (boys that had rockets) had streamers
3/5=boys that had rockets
subsitue
2/9 of 3/5
'of' means multiply
2/9 times 3/5
remember that a/b times c/d=(ac)/(bd) so
2/9 times 3/5=(2 times 3)/(9 times 5)=6/45=2/15
so 2/15 of the boys had streamers
They do not go through the origin. (Answer Choice C)
Answer:
$10 per painting
Step-by-step explanation:
The 1 = 10