<span>x+y=5
x-y=1
-------------add
2x = 6
x = 3
</span>x+y=5
3+y=5
y = 2
solution
(3,2)
answer is <span>c. (3, 2)</span>
Answer:
C. 120º
Step-by-step explanation:
so we know that the inside of a triangle is 180º and since all the measures are the same we can do 180/3 to find how much each angle is.
180/3 = 60º
now we also know that a straight line is equal to 180º and since we already have one angle, all we have to do is subtract 60 from 180.
180 - 60 = 120º
The answer is 21 as there are 7 toppings and u can only put two toppings on each pizza so in the end u hv to do 7 * 3 to get 21
Percent errors are calculated by dividing the absolute value of the errors by the exact length. What the student did wrong here is that he or she divided the given measurements by the exact lengths, which should not be the case.
Correct percent errors:
19 cm
percent error = (I19 - 20I / 20) x (100%) = 5%
21 cm
percent error = (I21 - 20I / 20) x (100%) = 5%
We can do this two ways. For now, we can just do it the easiest way.
Since they are giving us coordinates, let’s just plug them in and see if they work.
-3(2)+5(4)=2(2)+3(4)
-6+20=4+12
14=16
So, (2,4) is not an answer. Let’s test 3,3.
-3(3)+5(3)=2(3)+3(3)
-9+15=6+9
6=15
It’s neither.
Now, we can see the other way.
-3x+5y=2x+3y
Let’s move the y to one side and the x to the other. Let’s subtract 3y from both sides.
-3x+2y=2x
Now add 3x.
2y=5x
We could’ve plugged in the x and y values with this as well.
But the answer would be neither.