Arc length = radius* angle theta (in radians)
So angle 90 degree = 90*pi/180 radians= pi/2 radians
So arc length = 7.5* pi/2 cm = 11.8cm
So option A is correct.
Answer:
x=7, y=-9
Step-by-step explanation:
-9x – 9y = 18
-9x - 5y = -18
Multiply the second equation by -1
9x + 5y = 18
Add this to the first equation to eliminate x
-9x – 9y = 18
9x + 5y = 18
---------------------------
-4y =36
Divide each side by -4
-4y/4 = 36/-4
y = -9
Now find x
-9x -9y = 18
-9(x) -9(-9) = 18
-9x +81 = 18
Subtract 81 from each side
-9x +81-81 =18-81
-9x =-63
Divide each side by -9
-9x/-9 = -63/-9
x=7
The answer is 44...the area of a square is a side squared...11 times 11 equals 121 so we KNOW that each side is 11 meters across...perimeter is just the outter edges added up. A square has 4 sides so 11+11+11+11 is 44
The volume of the box is l*w*h, or l*w*10, and also the volume is 360. so, 10lw=360, meaning l*w=36, so we are looking for whole number factors of 36.
length: 1 2 3 4 6 9 12 18 36width:36 18 12 9 6 4 3 2 1
there are a total of 9 possible ways to make the base of the box so your answer would be 9
Currently 100 students can eat for 20 days, so we need to find the number of days 125 students can eat.
Originally:
100 students eat for 20 days
New:
125 students eat for x days. Multiply original number of students by original number of days which will give the total amount of students per day. Then divide the total amount of students per day by the new number of students to find the new number of days.
x= (100 students * 20 days)/ (100+25)
x= (100 * 20)/ 125
x= 2000/125
x= 16 days
ANSWER: 125 students can eat for 16 days.
Hope this helps! :)