Answer:
a²+b²=c²
Step-by-step explanation:
Answer: third option.
Step-by-step explanation:
By definition, a direct variation function has the form shown below:
Where k is a constant.
Then, knowing the given points, you can calculate k with the formula for calculate the slope of a line:
Substituting k into , you obtain:
We can find the answer by solving the two equations simultaneously.
equation 1: y = -0.4x^2 +3xequation 2: x + y = 10
We need to write equation to with y as the subject:equation 2: y = 10 - x
equation 1 = equation 2:
10 - x = -0.4x^2 + 3x0.4x^2 - 4x + 10 = 02x^2 - 20 + 50 = 0(2x - 10)(x - 5) = 0x = -10/2 or x = 5
<span>But x >= 0 (the question says it's a height </span>above<span> the water), so x = 5</span>
Substituting x = 5 into one of the equations:
y = 10 - x
y = 10 - 5
y = 5
<span>So the answer is C</span>
Answer: -15
Step-by-step explanation:
200
-215
- 15
Hope this helped
Answer:
C. -7/30
Step-by-step explanation:
You just multiply 2•-7 and 5•12
