Answer:
The side lengths cannot belong to a right triangle.
Step-by-step explanation:
This is a simple case of Pythagorean proof. If this triangle was a right triangle, 20^2 + 21^2 = 28^2. However, this is not the case. 20^2 + 21^2 = 841, which square root is 29.
If you forgot, the Pythagoren Theorem is: a^2 + b^2 = c^2.
Hope this helps!
Explanation:
Model: 1903
5 inches= 16 feet
wingspan=12.5 inches
In feet is the actual wingspan. Basically you set up an equation
Next you can cross multiply which is 5*y / 16*12.5 and get 5y=200
After you isolate y by dividing by 5 on both sides.
Y=40
Answer: The wingspan of the actual flyer is 40 feet.
Let's solve :
therefore, the correct choice is :
Answer:
Step-by-step explanation:
You can use the quadratic formula to determine if a quadratic equation has real or imaginary solutions. The quadratic formula is: . What really matters in this case is the discriminant, which is the stuff under the radical which is: . This is because the solutions are only imaginary, if the discriminant is negative, because then you would be taking the square root of a negative number. So let's look through each example:
; a=25, b=20, c-4: . By examining this one example, it's important to note, if you have one negative number as a or c, then it cancels out the negative sign in the -4, and it becomes positive. So let's look at examples where a or c doesn't equal a negative number OR both a and c equal negative, that way they cancel out and over -4ac is still negative.
; a=25, b=-10, c=4. In this case both a and c are positive so -4ac will remain negative. This gives you: . So this has a negative discriminant meaning it will have no real solution but rather imaginary solutions
The slope of a perpendicular line is -2x
then to get the equation:
10 = -2(7) + b
10 = -14 + b
24 = b
so the equation would be y = -2x + 24