It is correct so you did good never doubt yourself even though it is good to double check
Answer:
x = 22
Step-by-step explanation:
line AD is 180°
so 40° + (5x + 30°) = 180°
solve for x.
5x = 180-30-40
5x= 110
x = 110/5
x= 22
Yes they are all proportional
Imagine the < is an equal sign.
How would you solve 2m = 18 ? You would divide both sides by 2.
Do the same for the inequality:
<em>(Divide both sides by 2)</em>
_________________________________________
Answer:
Answer:
x=+6
Step-by-step explanation:
First, let's divide both sides of the equation by
3
:
⇒
3
x
2
3
=
108
3
⇒
x
2
=
36
Then, let's subtract
36
from both sides:
⇒
x
2
−
36
=
36
−
36
⇒
x
2
−
36
=
0
The left-hand side of the equation is now in the form of a difference of squares.
We can factorise it in the following way:
⇒
(
x
+
6
)
(
x
−
6
)
=
0
Using the null factor law:
∴
x
=
±
6
Therefore, the solutions to the equation are
x
=
−
6
and
x
=
6
.
