Solve for x
Step 1: Let tan(x) represent y
Step 2: Using quadratic equation solve for y
Since the y represents tan x
Therefore the correct answer is
Hence the correct answer is Option B
Answer:
the rectangular coordinates are , so the answer is A.
Step-by-step explanation:
sorry if it wrong ≧◇≦
Answer:
3.5 minutes
Step-by-step explanation:
32x=112
112/32
x=3.5 minutes
Answer:
79
Step-by-step explanation:
A square that has side length has area .
A circle that has a diameter 20 feet has area
We substitute the diameter into the formula to obtain;
The number of squares that has area 4 feet square that can fit into a circle with area is
When we round to the nearest whole number; we have 79 squares.
Answer:
Rui will reach his lowest altitude after diving for 10 seconds
Step-by-step explanation:
In the quadratic equation y = ax² + bx + c, the coordinates of the lowest or the highest point is (h, k), where
- h = and k = y at x = h
In the given question
∵ d(x) = x² - 10 x
∵ d represents his altitude in meters after x seconds
→ Compare it with the form above to find a and b
∴ a = and b = -10
∵ h =
→ Substitute the values of a and b in the rule to find h
∴ h = = 10
∴ h = 10
∵ h is the x-coordinate of the lowest point
∴ The time of the lowest altitude is 10 seconds
∴ Rui will reach his lowest altitude after diving for 10 seconds