1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zloy xaker [14]
3 years ago
12

A teacher is four time as old as a student .in 20 years, the student 's age will be half of the teacher 's age. How old are they

now?
Mathematics
1 answer:
notka56 [123]3 years ago
5 0
Let the present age of student be x
Present of teacher will be 4x

After 20 years,
Age of student = x + 20
Age of teacher = 4x + 20

According to the given condition after 20 years,
x + 20 = (4x + 20)/2
x + 20 = 2x + 10
2x - x = 20 - 10
x = 10

So student's present age is 10 years while teacher's is 4 x 10 i.e 40 years.

Hope This Helps You!
You might be interested in
Which value of x is in the solution set of the following inequality. -3x +5 >7
Vadim26 [7]
I’m not sure if this was a typo, but A and B are the same answer. A and B are correct, because when you solve this the answer has to be anything less than -0.6.
8 0
3 years ago
Kaya's family spends $105 to rent a boat for 7 days. The total cost, c, of the boat rental is proportional to the number of days
Elza [17]

Answer:

c=15d

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form k=\frac{y}{x} or y=kx

Let

c ----> the total cost of the boat rental

d ---> is the number of days, the family rents the boat

we know that

Kaya's family spends $105 to rent a boat for 7 days

so

For d=7 days, c=$105

Find the value of the constant of proportionality k

k=\frac{c}{d}

substitute the given values

k=\frac{105}{7}=\$15\ per\ day

therefore

The linear direct equation is equal to

c=15d

8 0
3 years ago
Whats 2.13×0.197 as a decimal
Tcecarenko [31]

Answer:

It's 0.41961.

8 0
3 years ago
Read 2 more answers
To start a board game, the player who rolls two sixes gets to go first. What is the probability that a player will roll two
Crank

Answer:

1 over 36

Step-by-step explanation:

4 0
3 years ago
Find limit as x approaches -3- of x/(sqrt(x^2-9)
gregori [183]
lim_{x \rightarrow -3} \frac{x}{x^2-9} =lim_{x \rightarrow -3} \frac{1}{2x} = \frac{1}{2(-3)} =- \frac{1}{6}
5 0
3 years ago
Other questions:
  • Solving Multi-step<br>3x-6x+7=-2​
    5·1 answer
  • I NEED ALOT OF HELP SOMEONE!
    9·1 answer
  • Solve -1 is less than or equal to -9 x
    8·1 answer
  • Luke's turkey chili recipe calls for 1.5 pounds of ground turkey for every 6 servings. How many servings can he make if he has 5
    15·2 answers
  • every day amy travels 30 miles one-way to work. The park-and-ride where she catches the train is 5 miles from her home. The aver
    12·1 answer
  • How do you solve a proportion divide or multiply there is a quiz!!!!!! you'll get brainliest!!!​
    8·2 answers
  • What’s the slope of (5,9) and (8,4)
    14·2 answers
  • Will mark brainliest if ur right! if not, u wont get it.
    8·1 answer
  • 1:2000000 find the land distance 14cm b) 31 cm​
    12·1 answer
  • What is 3649−−√?<br> I am so stuck on this question!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!