The rule is subtracting 86 each time
Answer:
X = 40 degree
Step-by-step explanation:
First I would name the points whatever you do always name the points it really helps
So,
75 = a
50 = b
The middle point will be o
85 = c
X = d
Ok so,
Angle aob = y
Angle cod = z
Now,
75+50+y=180 (angle sum property)
y=180-125
y=55
Angle y = z (vertically opposite angles)
55+85+x=180 ( angle sum property )
x=180-140
Therefore x=40 degree
In higher classes you will be able to do this in your mind itself without calculation all you need is practice.
Answer:
Let the number of pages be y and the number of chapters be x, then y = 24 + 12x + 48 = 12x + 72
y = 12x + 72
If the book has 25 chapters, the number of pages will be y = 12(25) + 72 = 300 + 72 = 37 pages.
Step-by-step explanation
Answer:
x=10
Step-by-step explanation:
Pull out like factors :
-9x + 90 = -9 • (x - 10)
Equations which are never true:
2.1 Solve : -9 = 0
This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation:
2.2 Solve : x-10 = 0
Add 10 to both sides of the equation :
x = 10