Do sin(90)*13/15 which gives you 0.87 then do inverse of sin-1(0.87) which angle A = 60.45 degrees
Denominator, 12 and 9 are on the bottom. and 15 and x are on the right side.
Answer:
The numbers of boys in one grade are 60 .
Step-by-step explanation:
As given
In one grade of 150 students .
The ratio of boys to girls is 2:3.
Let us assume that the scalar multiple of boys and girls be x.
Thus number of boys = 2x
Number of girls = 3x
Than the equations becomes
2x + 3x = 150
5x = 150
x = 30
Thus number of boys = 2 × 30
= 60
Therefore the numbers of boys in one grade are 60
Angle a is a vertical angle with the 30 degree angle above it. We know two of the 3 angles measures in the triangle, 30, 90 and b. All the angles in a triangle = 180 degrees.
30 +90 =120
180 -120 = 60
The measure of b is 60 degrees
angle c and 75 degrees are supplementary angles since a line is 180 degrees.
we can subtract 75 from 180 to find the measure of c.
180-75 =105
Angle a: 30 degrees
Angle b: 60 degrees
Angle c : 105 degrees
Jenna would’ve been on the job for 23 years
