Answer:
71 girls
Step-by-step explanation:
The class has 100 students.
It consists of 13 girls with no boyfriends, and the rest are "triplets" (B+2G groups)
If we subtract the 13 girls, the triplets must add up to 87 students.
The number of triplets is 87/3 = 29.
29(B + 2G) = 29B + 58G
The triplets consist of 29 boys and 58 girls with boyfriends.
No. of girls = girls with boyfriends + girls with no boyfriend
= 58 + 13
= 71
There are 71 girls in the class.
My late response (haha): First, you would write a proportion.
Step 1: 2496 over 48 = x over 31
(x represents the area of the land that is not fenced).
Step 2: Cross multiply
2496 times 31 and x times 48
Step 3: Calculate
77376 = 48x
Step 4: Divide both sides by 48
77376/48 = 1612
48x/48 = x
Step 5: Write it as a sentence
The area of the land that is not fenced is 1612 squared meters.
Hope that helped! Good luck! :]
Area of a regular polygon
A = (1/2)ap
a = apothem p = perimeter
in this case we know both, so the area of the square is just
.
Answer:
perpendicular = 10.24 cm
Step-by-step explanation:
by pythagorus theorem,
( where, h = hypotenuse, b = base,
p = perpendicular )
so,
=》
=》
=》
=》
perpendicular = 10.24 ( root 105 )
Answer:
-4
Step-by-step explanation:
x . y
0 . -4
1 . -2