The fraction of the total books about mammals is 7/18
Let the total number of books in the school be 1 whole , ie 12/12( since we are dealing with fractions)
Number of science books =7/12
Number of mammals books =2/3 of science books
=2/3 x 7/12=14/36 = 7/18
Since the total books are 12/12 which is also =1 whole
Then the fraction of total books that are about mammals are 7/18 x 1 whole =7/18
See related answer here: brainly.com/question/18443368
Y = 13.
Explanation
Replacing the value x with 4 in the function gives that y= 4+9
y= 13
The answer is -16. your welcome
28°, 93° and 59°
let x be the first angle then the second angle = 3(x + 3)
and the third angle = 2x + 3
the sum of the angles in a triangle = 180° , thus
x +3x + 9 + 2x + 3 = 180
6x + 12 = 180 ( subtract 12 from both sides )
6x = 168 ( divide both sides by 6 )
x = 28
the angles are x = 28° , 3(x + 3 ) = 93° and 2x + 3 = 59°
Mass a because it’s shorter in weight
