3:5=x:50
Therefore 5 ×x = 50
x = 10
Therefore 3 × 10 = 30
therefore 30 blue pens
proof = 30 blue + 50 red= 3+ 5
therefore 80 = 8x
Step-by-step explanation:
profit =profit% of cp=15/100×300=Rs45
SP=CP+profit=300+45=Rs345
The distance formula for 2 points = √((x2-x1)^2 + (y2-y1)^2)
use R for x1 and y1 and use S for x2 and y2.
Distance = √((10- 1)^2 + (3-(-6))^2)
Distance = √(9^2 + 9^2)
Distance = √(81 + 81)
Distance = √162
Distance = 9√2
Distance = 12.7 ( Rounded to nearest tenth)
<u>Given </u><u>:</u><u>-</u><u> </u>
- An extension ladder with 3 five-foot extensions is leaned against a wall with the base of the ladder 5 feet from the base of the wall.
<u>To </u><u>find</u><u> </u><u>:</u><u>-</u>
- How high on the wall does the top of the ladder sit?
<u>Solution</u><u> </u><u>:</u><u>-</u><u> </u>
Using Pythagoras Theorem ,
- 5² = 3² + h²
- 25 = 9 + h ²
- h² = 25 - 9
- h ²= 16
- h =√16
- h = ±4
- h = 4
