Answer: 15 students in her second class.
Step-by-step explanation:
Let A, B, and C stand for the number of students in each class. See the attached table.
The column labelled "Students" is formed by assinging B to the second class and finding how the other two classes relate to B. Class A has twice as many students as class B, so A = 2B. Class C has 5 more students than B, so C = B+5.
The total students amount to 65, whcih is the sum of A, B, and C:
A + B + C = 65
Substitute the values of A and C into this equation:
A + B + C = 65
2B + B + (B+5) = 65
4B + 5 = 65
4B = 60
B = 16
Use B=16 and solve for the other two classes (dotted blue line).
Answer:
Step-by-step explanation:
3+2x=51
2x=51-3
2x=48
x=48/2
x=24
SARAH'S AGE IS 24 YEARS
Answer:
4370*10^2
437*10^3
43.7*10^4
Step-by-step explanation:
The given number is
437000
Scientific notation can be used to write the number in different ways. We can use the powers of 10 to write the given number.
First way:
The first way is:
4370*10^2
Separating the hundred from the given number
The second way:
437*10^3
Separating the 1000 from the number in the form of power of 10
The third way:
43.7*10^4
Hence scientific notation can be used for writing the number in different ways..
Answer:
x³ + 5x
Step-by-step explanation:
2x+5x3+3x−4x3
=2x+5x3+3x+−4x3
Combine Like Terms:
=2x+5x3+3x+−4x3
=(5x3+−4x3)+(2x+3x)
=x3+5x
Answer:
x=0
Step-by-step explanation:
Anything divided by 0 is undefined so in this case 1/0 would be undefined.