Answeeeeeeeeeeerrrrrrrrrrrrrrr:
36
Answer:
≥ 420 boards
Step-by-step explanation:
Write the required relation between cost per board and "x" (the number of boards that must be sold).
143 + 30240/x ≤ 215 . . . . . . . note that the first term is <em>not</em> 143x
Subtract 143
30240/x ≤ 72
Multiply by x/72. This is a positive number because x is a positive number.
30240/72 ≤ x
420 ≤ x
At least 420 surfboards must be sold to limit the final cost per board to $215.
Answer: Rachel's prediction is faster than the actual unit rate, and Theadore's prediction is slower.
Answer:
The constant of variation is 1/6
Step-by-step explanation:
If we have direct variation the formula is
y = kx^2
We know that y = and x=6
6 = k*6^2
6 = k*36
Divide each side by 36
6/36 = k36/36
1/6 =k
The constant of variation is 1/6
