With multiple choice questions, I find it best to plug in on this one.
For a) x=2 and y=1 so, plug it into the equation.
1) -2(2) + 5(1) = 8 and than you check the other one
2) 2(2) + 2(1) = 6 if it works in both than that is your answer. If not than you try another choice until you get one that works in both equations.
The events are independant (i.e. what she rolls on the cube has no impact on how the spinner works). The probability of two independant events is given by:

For the cube, 1/2 the numbers meet our requitment of being even, so:

For the spinner, there are 3 odds out of 5 (1, 3 & 5) so:

and then:


1) False
2) True
3) True.
You can see for number one the angles are not the same, therefore they are not equal to eachother.
For two, because the line EC is running flat it is equal to 180. Because their is a little box on the other side of 1 & 2, we know that is equivalent to 90 degrees. Therefore the other side (1 &2) HAS to be 90, because the line in which they are on is 180, 90+ 90 = 180.
3, The same type of math for #2
Answer:
Step-by-step explanation:
Ashton estimates the square root of 72 in the following way:
√72=
2√36=
2×6=12
a) Explain why his reasoning is incorrect
This is incorrect because
is the correct answer but he has missed the square root term on 2.
or can be written as:
b) Estimate the square root of 72 to the nearest tenth without using your calculator. Show your work.
Find the factors of 72 we get
Now, we will combine 2 terms if the are same so,