In one grade of 150 students, the ratio of boys to girls
how many boys are in that grade?
75. because 150 divided by 2 equals 75
60, because
of the students are boys
100. because
of the students are boys
it is impossible to tell because
that are boys is unknown

You idiot you answered your own question!

60, because 2/5 of the students are boys

Step-by-step explanation:

btw how did they answer their own question?

answer:

the area of the shape is 51.5

step-by-step explanation:

*at first we will find the area of the rectangle whose vertices are:

(0 , 0) , (11 , 0) , (11 , -8) , (0 , -8)

its length = 11 - 0 = 11 and its width = 0 - (-8) = 8

its are = 11 × 8 = 88⇒(1)

*now we will subtract area of three figures from the area of the rectangle to get the area of the figure abcdef

*the first figure is the trapezium whose vertices are:

c (11 , 0) , d (6 , -3) , e (4 , -3) , (4 , 0)

the length of the two parallel bases are :

b1 = 6 - 4 = 2 , b2 = 11 - 4 = 7

the length of its height = 0 - (-3) = 3

its area = ⇒(2)

*the second figure is the trapezium whose vertices are:

(0 , 0) , (4 , 0) , e (4 , -3) , f (0 , -6)

the length of the two parallel bases are :

b1 = 0 - (-3) = 3 , b2 = 0 - (-6) = 6

the length of its height = 4 - 0 = 4

its area = ⇒(3)

*the third figure is the triangle whose vertices are;

f (0 , -6) , (0 , -8) , a (5 , -8)

the length of its base = 5 - 0 = 5

the length of its height = (-6) - (-8) = 2

its area = ⇒(4)

then the area of abcdef = (1) - (2) - (3) - (4) = 88 - 13.5 - 18 - 5 = 51.5