Answer:
. In other words, there number of girls is .
Step-by-step explanation:
The average of a number of measurements is equal to the sum of these measurements over the number of measurements.
.
Rewrite to obtain:
.
For this question:
.
.
Therefore:
.
On the other hand, there are boys and girls in total. Using the formula for average:
.
From the question, this average should be equal to . In other words:
.
Solve this equation for to obtain:
.
.
.
In other words, the number of girls here is .
Answer:
Step-by-step explanation:0.93827160493 that is 76 divided by 81
0.9625 now start this too number and you will get your answer
Answer:
x = 2
Step-by-step explanation:
x + 1 + 4 = 2x + 3
x + 5 = 2x +3
x + 2 = 2x
2 = x
x = 2
Answer:
112°
Step-by-step explanation:
the sum of the 4 angles of a quadrilateral = 360°
To find the fourth angle, sum the 3 given angles and subtract from 360
fourth angle = 360° - (100 + 104 + 44 )° = 360° - 248° = 112°
Answer:
6b^2 +4b
Step-by-step explanation:
The area of a triangle is
A = 1/2 bh
A = 1/2 * (3b+2) * (4b)
=1/2 (12 b^2 +8b)
= 6b^2 +4b