Slimination
the teacher probably wants you to eliminate the x terms since there are an equal number of them
so multiply first equation by -1
-6x+3y=-30
add to second equation
6x-6x+3y+y=18-30
0x+4y=-12
4y=-12
divide by 4
y=-3
subsitute
6x+-3=18
add 3
6x=21
divide both sides by 6
x=21/6=7/2
x=7/2
y=-3
Answer:
The interval notation is;
Step-by-step explanation:
The solution set of the inequality represented on the number line is
The boundary 4 is inclusive in the solution set, so we use square bracket "[ ]" to show inclusion and open bracket "()" to show that, that part of the interval in not bounded.
In interval notation, we can write this as;
Repeated
The circumference of the circle is 144.4 yards
Step-by-step explanation:
The circumference of a circle is C = 2πr, where
- r is the radius of the circle
- π is a constant ratio between the circumference of the circle and its diameter and its value is approximately 3.14
∵ The radius of a circle is 23 yards
- Use the rule above to find its circumference
∵ C = 2πr
∴ C = 2π(23)
∵ π ≅ 3.14
∴ C = 2(3.14)(23)
∴ C = 144.44 yards
- Round it to the nearest tenth
∴ C = 144.4 yards
The circumference of the circle is 144.4 yards
Learn more:
You can learn more about the circle in brainly.com/question/1952668
#LearnwithBrainly