Answer:
Step-by-step explanation:
1. expand.
2. Subtract 8x from both sides.
3. simplify 10x - 2 - 8x to 2x - 2.
4. Add 2 to both sides.
5. Simplify 6+2 to 8.
6. Divide both sides by 2.
7. Simplify 8/2 to 4.
8. switch sides.
Therefor, rhe answer is x=4
Answer:
C. 130
Step-by-step explanation:
Since the sum of the interior angles for a quadrilateral shape is 360 degrees, you take 55 and 45 away from 360 to get 260. You need to then divide that number by 2 to get Q and S, but you are looking for Q in this case, so the answer is 130.
Answer:
Look below.
Step-by-step explanation:
One property of a cyclic quadrilateral is that the opposite angles are supplementary. Angles ABC and ADC are opposite; therefore, supplementary. We know that angle x is supplementary to angle ABC because they are on the same line. We know that angle y is supplementary to angle ADC because they are on the same line.
ABC + ADC= 180 degrees
ABC + x= 180 degrees
ABC + ADC = ABC + x
- ABC -ABC
ADC= x
ADC+ y= 180 degrees
ADC + ABC= 180 degrees
ADC+y= ADC+ABC
-ADC -ADC
y=ABC
ABC=x ADC=y
ABC + ADC= 180
Property of substitution:
x+y=180
The lava has flowed for 7.25 years.
8•7.25+2=60
