Answer:
There were 40 2-point questions and 9 3-point questions.
Step-by-step explanation:
To solve this situation, write two equations. One for the number of questions and one for the number of points.
Let x be the number of 2 point questions.
Let y be the number of 5 point questions.
x + y = 49
Now since x are each worth 2 points, the total points is 2x.
And since y are each worth 5 points, the total points is 5y.
So 2x + 5y = 125. Substitute one of the equations into the other to solve for the variables.
x + y = 49 becomes x = 49 - y. Substitute it.
2(49-y) + 5y = 125
98 - 2y + 5y = 125
98 + 3y = 125
3y = 27
y = 9
Substitute y = 9 back into the equation x = 49 - y to find x.
x = 49 - 9
x = 40
<u><em>Answer:</em></u>
Elliot biked 70 miles
<u><em>Explanation:</em></u>
We are given that the total distance of the race is 100 miles
We are also given that Elliot covered 
of this distance
To get the number of miles covered by Elliot, we will simply multiply the ratio of the covered distance () by thetotal distance of the race (100 miles)
<u>This is done as follows:</u>
Distance covered = 
miles
<u>Therefore,</u> Elliot biked for 70 miles
Hope this helps :)
Answer : SSE = 9
r^2 = 0.75
r^2 = 1 - (SSE/SST)
SSE/SST = 1 - r^2 = 1 - 0.75 = 0.25
<span>SST = 9/0.25 = 36</span>
7(12 + x)
84 + 7x
Hope my answer helps!
Answer:
x^2-4x+4
Step-by-step explanation:
x^2-2x-2x+4
=x^2-4x+4
