Answer:
Joe's father is 45.
Step-by-step explanation:
3x-x+2=4
Answer:
pi × 18cm^2
Or approximately,
56.52cm^2 (using 3.14 for pi)
or
56.5487cm^2 (using pi button on calculator)
Step-by-step explanation:
Area of a circle is pi times [radius squared].
All circles are 360°.
Problem can be solved by finding area of whole circle, and then using ratios.
Whole Circle: area = pi × (9cm)^2 = pi × 81cm^2
80° / 360° = Area[shaded] / (pi × 81cm^2)
pi × 18cm^2 = Area[shaded]
((If you read my answer before the edit, I am sorry. I made a calculator error.))
Answer:
A
Step-by-step explanation:
We know that identity:
cos^2x+sin^2x=1.
From that we have:
cos^2x=1-sin^2x.
So it is:
cos^2x-sin^x=(1-sin^2x)-sin^2x=1-2sin^2x.
And this is A).
B) is not treu because cos^2 is not sin^2x+1
C) is not true because cos^2x-sin^x=1 is false.
D) is not treu because cos^2x is not sin^2x-1
1.5
-1.5
Real numbers are ANY numbers that can go on a number line
Answer:
14080 ft
Step-by-step explanation:
You want to convert 4 mph to ft/min and then mult. the result by 40 minutes:
4 mph 5280 ft 1 hr
---------- * --------------- * ------------- = 352 ft/min
1 1 mile 60 min
Now multiply this rate (speed) by 40 minutes:
352 ft 40 min
---------- * ------------ = 14080 ft (answer)
min 1
This would be the same as 2 2/3 miles (in 40 min)