Answer: 3.5a+5b=470 and a+b=115
Step-by-step explanation:
C
Because .75 times 9 would give you the price of the books and then you would have to add C, the amount left to get to 20.
(X,Y) is (20,10) so that mean he made 10 bucks and sold 20 cups
Answer:
4.64
Step-by-step explanation:
You multiply 2.32 by 2
2.32*2 = 4.64
Answer:
(1,2021)
Step-by-step explanation:
P and q can vary subject to their sum being 2020.
Consider one parabola with p1 and q1 and another with p2 and q2.
y1=(x1)^2+(p1)(x1)+(q1)
y1=(x2)^2+(p2)(x2)+(q2)
At their intersection, the x and y coordinates are the same.
y1=y2=y
x1=x2=x
x^2+(p1)x+(q1)=x^2+(p2)x+(q2)
Solve for x
x(p1-p2)=q2-q1
x=(q2-q1)/(p1-p2)
Use the constraint that p+q=2020 to eliminate p1 and p2.
p1=2020-q1
p2=2020-q2
x=(q2-q1)/(2020-q1-2020+q2)
x=(q2-q1)/(q2-q1)
x=1
Substitute in the equation for y.
y=1^2+p(1)+q
y=2021
