The answer should be 7.5 mins, but I may have calculated wrong :/ I hope that helps you come closer in your answer :)
Step-by-step explanation:
multiply 5x+2y=19 by 3 youll get 15x+6y=57
eliminate y
7x-6y=9
<u>15x+6y=57</u><u> </u> +
22x=66
x=3
substitute x to 5x+2y=19
15+2y=19
2y=4
y=2
Answer:
graph C)
Step-by-step explanation:
A p e x approved
Answer:
Draw an open circle on 3 and shade to the left.
Step-by-step explanation:
Given:
The inequality given is:

In order to solve for 'x', we add 6 on both sides of the inequality. This gives,

Therefore, the solution is 'x' less than 3.
So, 'x' includes all the values that are less than 3 and excluding 3 as the inequality sign is less than.
So, on a number line, the values that are less than 3 are to the left of 3. So, we shade to the left. Also, 3 is excluded from the solution. So, we use an open circle as shown below.
So, the first option is the correct option.