Answer:
C) 123 cm^2
Step-by-step explanation:
well if we find CD we can cut striat down C and do area of a triangle plus the area of the rectangle.
to find CD you need length of BC
BC^2 = AC^2-AB^2 --> BC^2 = 400-100 --> BC^2 = 300
BC = 300^2 --> about 17 causeing CD being 4
now we have info
triangle area is BxHx 1/2 --> 17x10x1/2 --> 85cm^2
Now we do the small rectangle area is BxH --> 4x10 --> 40cm^2
85 + 40 = 125cm^2
the only one close is 123cm^2
a. The water in the second tank decreases at a faster rate than the water in the first tank. The initial water level in the first tank is greater than the initial water level in the second tank.
Step-by-step explanation:
Step 1:
It is given that the time remaining in first tank is given by the equation y = -10x + 80. We can get the total water in the tank by substituting x = 0 in the equation. The total volume of water in first tank is 80 litres.
Step 2:
The value of y in the equation y = -10x + 80 will be 0 when the tank is fully empty. When y = 0 , 10x = 80, so x = 8. We can conclude that the first tank empties fully in 8 minutes.
In 8 minutes 80 litres of water is emptied from first tank. So the water in the first tank decreases at rate of 80 / 8 = 10 litres per minute
Step 3:
As per the given table for the second tank, 60 litres of water remains when x =0. So the total volume of water in the second tank = 60 litres.
Step 4:
As per the given table for the second tank, the volume becomes 0 in 5 minutes. In 5 minutes 60 litres of water is emptied from second tank. So the water in second tank decreases at rate of 60 / 5 = 12 litres per minute.
Step 5:
The initial volume of water in first tank is higher. The water in second tank decreases at a faster rate than the first tank.
Step 6:
The only correct option is:
a. The water in second tank decreases at a faster rate than the water in the first tank. The initial water level in first tank is greater than the initial water level in the second tank.
Answer:
the coeficient
Step-by-step explanation:
Answer:
d ≤ 4
Step-by-step explanation:
4d + 7 ≤ 23
Subtract 7 from both sides:-
4d ≤ 16
d ≤ 4
Answer:
4x-20
Step-by-step explanation:
2x + 2x =4x
10 + (-30) = -20
put it together!
4x-20
(i hope thats the answer form u were asking for) xoxo raina
