A quadratic function is given by y = ax^2 + bx + c
c(2) = a(2)^2 + 2b + c = 45
4a + 2b + c = 45 . . . (1)
c(4) = a(4)^2 + 4b + c = 143
16a + 4b + c = 143 . . . (2)
c(10) = a(10)^2 + 10b + c = 869
100a + 10b + c = 869 . . . (3)
Solving (1), (2) and (3) gives a = 9, b = -5, c = 19
Therefore, c(x) = 9x^2 - 5x + 19
c(7) = 9(7)^2 - 5(7) + 19 = 9(49) - 35 + 19 = 441 - 16 = 425
Therefore, it costs $425 to produce 7 calculators.
Answer:
The co-ordinates of K¹( -1 , -2 )
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given that the point K( -2,1 )
<em>when rotating a point 90° about the origin </em>
Given point A(x,y) transformation to A¹( - y,x )
Given point K(-2,1) → K¹ ( -(1) , -2)
<u><em>Final answer</em></u>:-
<em>The co-ordinates of K¹( -1 , -2 )</em>
Answer:
A
Step-by-step explanation:
Look at the graph of the relationship. Find the y-value of the point that corresponds to x = 1. That value is the unit rate
Answer:
Hey there! Since 20 is 25% of 80, there will be 20 carrots. I hope this was helpful!
Step-by-step explanation:
It’s 0.775x +2.5 =correct
