30% of the 30 marbles is nine and 9-30 = 21 so your answer is 21
Answer:
$750
Step-by-step explanation:
We can set up the equation 30x + 50y = z where x = the amount of small dogs, y = the amount of big dogs, and z = the total.
After plugging in the x and y values to solve for z, we are left with the following equation:
30(15) + 50(6) = 750
Answer:
50%
Step-by-step explanation:
47 is half of 94 which is the same thing as 50% of 94
Katie has equation
and wants to solve it completing the perfect square. In order to do it, first rewrite 7 in right side:

Then note that
so Katie has to add
to both sides (because
):

Answer: correct choice is C.