Answer:
8
Step-by-step explanation:
3(2)-2(1-2) / 3-2
6+2 / 1
8/1
= 8
Let the price of the computer = X
Store A is selling it for 25% off, so they are selling it for 75% of the original price, so you have 0.75X
Store B is selling it for 180 less the original price, so you have X - 180
Now set both equations to equal and solve for x:
0.75x = X-180
Subtract 1X from each side:
-0.25x = -180
Divide both sides by -0.25:
x = -180 / -0.25
X = 720
The original price is $720
check:
720 x 0.25 = 180
Answer:
Step-by-step explanation:
Since, the radius of the balloon 4 days ago = 5,
⇒
Now, if the radius is decreased by 0.5 cm each day,
Then the current radius of the balloon = 5 - 4 × 0.5 = 5 - 2 = 3 cm,
⇒
Thus, the ratio of the current volume of the balloon to the volume of the balloon 4 days ago
⇒ Option A is correct.
Answer:
x = 7
Step-by-step explanation:
-7x= -8x+7
Add 8x to each side
-7x+8x= -8x+8x+7
x = 7