Answer:
90%
Step-by-step explanation:
The mountain climber's ascent rate is calculated by dividing 3/4 kilometer by 1/12 of an hour. That is mathematically expressed as,
ascent rate = (3/4 km) / (1/12 h)
= 9 km/h
Thus, the climber ascended at a rate of 9 km/h.
To fond the area of a trapezoid, add the top and bottom together, divide that by 2, than multiply by the height.
Area = (8+12)/2 = 20/2 = 10
10 x 9 = 90 square centimeters.
Answer: Jon purchased 4 staplers and 7 three hole punchers.
Step-by-step explanation:
Let x be the number of staplers and y be the number of three hole punches purchased by Jon.
Then the equation for total items will be
............(1)
And the equation for the total cost will be
........................(2)
Multiply eq(1) by 7 and then subtract from eq (2), we get
Put y=7 in eq(1), we get x= 4.
Hence, Jon purchased 4 staplers and 7 three hole punchers.