Step-by-step explanation:
let x represent the bus
6x + 21 = 195
6x = 195 - 21
6x =174
x = 29
The perimeter is equal to 60 feet and has the formula:
Perimeter = 2 l + 2 w
60 = 2 l + 2 w
The area is equal to 200 square feet and has the formula:
Area = l w
200 = l w
Rewriting area in terms of l:
l = 200 / w
Combining this with the perimeter formula:
60 = 2 (200 / w) + 2 w
60 = 400 / w + 2 w
Multiplying all by w:
60 w = 400 + 2 w^2
Dividing by 2 and rearranging:
w^2 – 30 w = - 200
Completing the square:
(w – 15)^2 = - 200 + (-15)^2
(w – 15)^2 = 25
w – 15 = ±5
w = 10, 20
Hence the dimensions of the garden is 10 feet by 20 feet
3 x 4 - 1 + 2
With parentheses would be - (3x4) - (1+2)
This is because either way, you would still do the multiplication first because of the rule of PEMDAS/GEMDAS which states that parentheses and grouping symbols go first.
Answer: 40 percent
Step-by-step explanation: real value = 1.5 liters ,estimated value = 2.1 liters.
Percentage student's estimate = (difference in estimate/ real value) × 100
Difference in estimate = 2.1-1.5 = 0.6
Real value = 1.5
Percentage student's estimate = (0.6/1.5)×100 = 0.4×100 = 40 percent
