Ned got an overall grade of 86 percent because if each question is 4 points, then 6×4=24 but if he got a bonus 10 points, then you can do 24-10=14 and then you do 100-14 which equals your answer: 86.
Answer:
A, B, C, F
Step-by-step explanation:
A: Its is acute because it has 2 sides that are less than 90%
B: It is obtuse because there is 1 side that is over 90%
C: It has 2 equal sides.
F: 100% + 40% + 40% = 180%
Answer:
A rational number: 5.4, which also can be written as 27/5
Irrational number:
sqroot 28
approx= 5.29
Step-by-step explanation:
5.4 is a rational number because it is a terminating decimal. That means it ends after the 4, there are no more numbers. Also it can be written as a ratio (looks like a fraction) 27/5.
Sqroot28 is irrational. Since 28 is not a perfect square, when you squareroot it you get a number with a neverending decimal
sqroot28 = 5.2915026221...
since the decimal does not repeat or end it cannot be written as a ratio, so it is not rational
sqroot28 ~= 5.29
Answer:
Step-by-step explanation:
a) y=![x^{2} -4x](https://tex.z-dn.net/?f=x%5E%7B2%7D%20-4x)
x=-1 ⇒ y=![(-1)^{2} +4=1+4=5](https://tex.z-dn.net/?f=%28-1%29%5E%7B2%7D%20%2B4%3D1%2B4%3D5)
x=1 ⇒ y=![1^{2} -4=1-4=-3](https://tex.z-dn.net/?f=1%5E%7B2%7D%20-4%3D1-4%3D-3)
x=2 ⇒ y=![2^{2} +8=4-8=-4](https://tex.z-dn.net/?f=2%5E%7B2%7D%20%2B8%3D4-8%3D-4)
x=4 ⇒ y=![4^{2} -16=16-16=0](https://tex.z-dn.net/?f=4%5E%7B2%7D%20-16%3D16-16%3D0)
b)
=![x^{2} -4x+4-4=(x-2)^{2}-4](https://tex.z-dn.net/?f=x%5E%7B2%7D%20-4x%2B4-4%3D%28x-2%29%5E%7B2%7D-4)
so the blue one
Answer:
3x+12
Step-by-step explanation:
add the numbers:4x+12-x
combine like terms:4x+12-x
3x+12