For 8, 15.25*18=274.5, 274.5/2= 137.25 or 137 1/4
for 9, 11*13=143, 143/2= 71.5 or 71 1/2
Answer:
40 black ink cartridges and 19 colored ink cartridges
Step-by-step explanation:
Let 
represent the number of black printer ink cartridges sold. Let 
represent the number of color printer ink cartridges sold.
Set up a system of equations:
Substitute:
⇒ 40 black ink cartridges, 19 colored ink cartridges (ans)
Your tip for a bill that costs $80.50 at a 15% tip rate will be $12.06
Answer:
7 units
Step-by-step explanation:
In an isosceles right triangle, the hypotenuse is √2 times the leg length. Then ...
... 7√2 = leg·√2
... 7 = leg . . . . . . . divide both sides by √2
_____
<em>Comment on isosceles right triangle</em>
If the legs are both length 1, the Pythagorean theorem tells us ...
... hypotenuse² = 1² +1² = 2
... hypotenuse = √2 . . . . . . . . . square root both sides of the equation
This result can be scaled by any multiplier you like. In this problem, the scale factor is 7, making the legs 7 and the hypotenuse 7√2.
