I think the answer is D.
50% of the students work on homework for 20 minutes or less per night.
Answer:
The value of the third reading is 80 F
Explanation:
Let x represent the value of the third reading.
The average of a set of data equals the sum of all the data divided by the number of data;
Given;
Average = 80 F
Sum of data = 65+85+x+90
Number of data = 4
substituting we have;
solving for x;
Therefore, The value of the third reading is 80 F
We are given with two dimaters of piston 8 cm and 40 cm while the load is equivalent to 15000N. We are asked to determine the force applied to the small piston. Pressure is equal to force per unit area. In a, 15,000 N / 40^2 cm2 = F2 / 8^2cm2; F2 is equal to 600 N. In b, pressure is equal to 9.375 Pa
Answer:
x= -3
Step-by-step explanation:
-7x +15 - 15 = 36 - 15
-7x = 21
-7x ÷ -7 = 21 ÷ -7
x= -3
Answer:
7 students.
Step-by-step explanation:
To pass science, a student requires at least 70 grades so students who scored below 70 will be failed.
From the given bar chart we can calculate the number of students who scored below 70 grades
Students who earned 50 - 59 = 2
Students who earned 60 - 69 = 5
Therefore, number of students who failed were
2 + 5 = 7 students.