x is undefined
we move all the terms to the left
8x-5-(2x(3x+1)+2x)=0
we calculate terms In parentheses; (2(3x+1)+2x), so we multiply parentheses
6x+2+2x
we add all the numbers together, and all the variables 8x+2
back to the equation
-(8x+2)
we get rid of all parentheses
8x-8x-2-5=0
we add all the number together and all the variables
0x-7=0
we move all terms containing x to the left all other terms to the right
0x=7
therefore x=7/0
which means x is undefined
So yuo simplyfly
15:20=3:4
6:8=3:4
8:12=2:3
9:12=3:4
so your answer is not c
Answer:
if the diameter of the circle is 25, then the radius will be 12.5.
A=3.14(12.5)2 --> 490.9m^2
C= 2*3.14(12.5)---> 78.5 m
Answer: 22.5 degrees
Step-by-Step Explanation:
As we can see, we are given a line, which is a straight angle. Hence, it will be of 180 degrees.
=> All the angles sum up to 180.
Therefore,
=> 3x + x + 90 = 180
= 4x + 90 = 180
= 4x = 180 - 90 = 90
=> x = 90/4 = 22.5
Therefore, x = 22.5 degrees
Verification:
=> 3x + x + 90 = 180
= 3(22.5) + 22.5 + 90 = 180
= 67.5 + 22.5 + 90 = 180
= 90 + 90 = 180
=> 180 = 180
=> LHS = RHS
First things first when multiplying and dividing positive and negative numbers if the two signs are the same it's positive, and if both signs are different it's negative.
you simply just multiply and divide the same as you would normally you just have to pay attention now if the answer is positive or negative.