Answer: 16 m
Step-by-step explanation:
Using the Pythagorean theorem you can find the height of the mast.
The formula is;
a² + b² = c²
a is one side of the triangle such as the width
b is another side such as the height
c is the hypotenuse which is the longest side.
c will therefore be 20m.
a will be 12m
12² + b² = 20²
b² = 400 - 144
b² = 256
b = √256
b = 16m
We can not evaluate it with real numbers, because there is no real number that multiplies itself twice and gives -25.
The answer is an imaginary number.
√-25 = 5i where i = √-1
So it can only be computed using imaginary numbers.
Answer:
0
Step-by-step explanation:
When x=6
f(6) =(6)2-2(6)=12-12=0
So for these types of questions you want to substitute the value given into the equation...
So for a,
f(x)=2x-7
f(-3)=?
well instead of x you place -3,
so
f(-3)= 2*-3 - 7
So now you solve using order of operations (PEMDAS)
So,
2*-3=-6 So,
f(-3)=-6-7
-6-7=-13
So,
f(-3)=-13
Try to do that for the others and I'll let you know if you're right. Good luck!
Answer:
$1939
Step-by-step explanation:
easy, just half the total need!
