Answer:
Anna is 41 years old.
Step-by-step explanation:
Easiest way to do this is by building a equation,
Lest say Anna's age is 
.
Then as Peter is 3 years older than Anna Peter's age should be 
.
Then the combined ages of the two people is given as 85. So we can write an equation as,
(deducting 3 from both sides of the equation)
As we originally took Anna;s age as
We can say Anna is 41 years old.
Answer: The amswer is D because -1 + 1 = 0
Answer: Step-by-step explanation:
angle 1=41°
angle 2=angle 1=41°
angle 3=180-2×41=98
Answer:
5x maybe dont take my word
Answer:
17.8 cm
Step-by-step explanation:
In the 17 hours between heights of 18.6 cm and 15.2 cm, the candle lost 3.4 cm in height. That is, the height decreased at the rate of ...
(-3.4 cm)/(17 h) = -0.2 cm/h
In the 4 hours between 12 hours and 16 hours of burning time, the candle will have changed its height by (4 h)(-0.2 cm/h) = -0.8 cm.
The height at 16 hours of burning is then 18.6 cm -0.8 cm = 17.8 cm.
