hi there !
<em>a supplementary angle is equal to 180⁰ </em>
<em>a supplementary angle is equal to 180⁰ they are angles on a straight line / flat line</em>
<em>a supplementary angle is equal to 180⁰ they are angles on a straight line / flat lineif you want to find a missing angle in a supplementary angle then you have to subtract the given angles by 180⁰</em>
hope this helps and please ask if you have any questions :)
To solve this problem you must apply the proccedure shown below:
1. You must make a system of equations, as below:
2. Let's call:
x: the number of first class tickets bought.
y: the number of coach tickets bought.
3. Then, you have:
x+y=7 (First equation)
970x+370y=3790 (Second equation)
x=7-y
4. By substitution, you have:
970x+370y=3790
970(7-y)+370=3790
y=5
x=7-y
x=7-5
x=2
Therefore, the answer is:
- Number of first class tickets bought=2
- Number of coach tickets bought=5
<h3>B-61. C=</h3><h3><u>Domain:</u></h3>
0 < x < ∞
or
x > 0
<h3><u>Range:</u></h3>
y ≥ 500
<h3>B-64. A=</h3>
9 − 3 = 4 − 3
5 − 3 = −3
5 = 0
= 0
Hope this helps you ! :)
C because that sign means lesser than or equal to 6
