Explanation
Angle x and angle 141 are congruent because they are corresponding angles, and because the lines are parallel. Corresponding angles are in the same corner. In this case it's the northwest corner.
Angles x and y are supplementary. They glue together to get a straight line. Which means the angles add to 180.
x+y = 180
141+y = 180
y = 180-141
y = 39
The number of students in the seventh grade who would be expected to prefer math over science are:
128
Total number of students in seventh grade are: 150 students.
Now he took a sample of 25 students and find that the 85% of the sample prefers math over science.
This means that out of the sample the number of students who prefer maths over science is:
Now, out of the total seventh graders the number of students who prefer math over science is:
which is approximately equal to 128.
Hence, the answer is:
128 students
Answer:
x = 18
x = 3
Step-by-step explanation:
2x² - 42x + 108 = 0
common factor is two, so take it out to simplify equation
2 (x² - 21x + 54) = 0
0/2 = 0
x² - 21x + 54 = 0
Factors of 54 which add up to 21 is 18 and 3
(x - 18)(x - 3) = 0
Hence,
x = 18
x = 3