All categories

2 years ago

1. In a class there are 40 students. 90% of them take exams; 3/4 of those who took the exam passed. How many students graduated?

Mathematics

1 answer:

Tpy6a [65]2 years ago

6 0

Answer:

A. 27

Step-by-step explanation:

There are 40 students and 90% of them take exams

(40 students) * (0.9) = 36 students took exams

Of those 36 students, 75% (or 3/4) of them passed. Assuming passing exams means graduating:

(36 students) * (0.75 ) = 27 students graduated

You might be interested in

How can 10% of 82 be used to determine 60% of 82?

myrzilka [38]

Answer:10% of 82 is 820so 60% of 82 is 4800

Step-by-step explanation:

i hope im right

5 0

1 year ago

What is 4x-9+19=8x-14

yawa3891 [41]

- 4x from 8x = 4x
-9 + 19 = 4x -14
-9 + 19 = 10
10 = 4x -14
+14
24 = 4x
divide by 4
X = 6

4 0

2 years ago

Describe and correct the error Algebra 1<br> 13 POINTS

Elenna [48]

Answer:

im to late lol

Step-by-step explanation:

7 0

2 years ago

Use order of operation and the mathematical properties of numbers to simplify these numbers (3+2^2)^2 =

Art [367]

Answer:

Step-by-step explanation:

(3+2²)²

(3+4)²

(7)²

3 0

2 years ago

Read 2 more answers

Which of the following is a solution to the differential equation xy′−3y=6 ?

ololo11 [35]

Answer:

$y = 5 {x}^{3} - 2$

Step-by-step explanation:

The given differential equation is :

xy′−3y=6

We want to determine which of the following options is a solution to the differential equations.

The function that satisfies the differential equation is a solution.

We can verify that

$y = 5 {x}^{3} - 2$

satisfy this differential equation.

We differentiate to get:

$y' = 15 {x}^{2}$

We substitute the function and its derivative into the differential equation to get:

$x(15 {x}^{2}) - 3(5 {x}^{3} - 2) = 6$

We expand and simplify on the left:

$15 {x}^{3}- 15 {x}^{3} + 6= 6$

This simplifies to:

$6 = 6$

Verified.

We can show that all the other functions do not satisfy this differential equation

4 0

2 years ago