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
Passes through (3,-6) and (-1,2) slope intercept form?
IRISSAK [1]

Answer:

2/1

Step-by-step explanation:

8/4 which is also 2/1

7 0
3 years ago
The probability that a can of paint contains contamination is 3.23%, and the probability of a mixing error is 2.4%. The probabil
stich3 [128]

Answer:

4.6%.

Step-by-step explanation:

The probability that a can of paint contains contamination(C) is 3.23%

P(C)=3.23%

The probability of a mixing(M) error is 2.4%.

P(M)=2.4%

The probability of both is 1.03%.

P(C \cap M)=1.03\%

We want to determine the probability that a randomly selected can has contamination or a mixing error. i.e. P(C \cup M)

In probability theory:

P(C \cup M) = P(C)+P(M)-P(C \cap M)\\P(C \cup M)=3.23+2.4-1.03\\P(C \cup M)=4.6\%

The probability that a randomly selected can has contamination or a mixing error is 4.6%.

3 0
3 years ago
What is the slope of this line?​
Mamont248 [21]

Answer:

y= 2x

Step-by-step explanation:

The slope is 2

The y-intercept is zero because it intersects the origin so you do not need to right that.

Now just put it is slope-intercept form.

Hope you remember me because I just answered your other question 2 minutes ago! LOL :D

Can you please name me the brainiest in both of those answers. Thanks!

4 0
3 years ago
4x + 5y = 10 Question: A. Convert the equation to slope intercept form and justify each step. B. Explain how to graph the linear
VladimirAG [237]
The answer to your question is A but i dont see a D option so it might be wrong


8 0
3 years ago
Read 2 more answers
Graph the line whose y-intercept is -7 and whose x-intercept is 1
vesna_86 [32]

Answer:

y=7x -7

Step-by-step explanation:

We are given two points, the y - intercept and the x - intercept.

The y - intercept being: ( 0, -7 )

The x - intercept being: ( 1, 0 )

The equation of a line in slope - intercept form is:

y = mx + b, where m is the slope and b is the y - intercept.

We already have the y - intercept. So far we have:

y = mx - 7

What we're missing is the slope.

To find the slope, we can use this formula:

\frac{y_{2}-y_{1}  }{x_{2}-x_{1}}, where x_{2} and x_{1} are the x - coordinates of both points and y_{2} and x_{1} are the y - coordinates of both points.

m=\frac{0-(-7)}{1-0} \\\\m=\frac{7}{1}\\m=7

We now have the missing piece, the slope, so the equation now is:

y=7x -7

3 0
3 years ago
Other questions:
  • The area of a square rug can be represented by the expression of 100x²+60x+9.
    5·1 answer
  • Need help on this due today
    13·1 answer
  • Evaluate x/y for x equals 3/10 and y equals 4/5
    9·1 answer
  • If GI = 20 and H = 100°, then HI ___ 20. <br>A. &lt;<br>B.=<br>c.&gt;
    10·2 answers
  • The manager at Gabriel's Furniture Store is trying to figure out how much to charge for a bookshelf that just arrived. The books
    7·1 answer
  • Find the difference 18-15
    14·2 answers
  • Please explain how to do this please show work
    9·1 answer
  • Is (-3,1) a solution if the system? y = -x - 2<br> x + 5y = 2
    9·1 answer
  • Which expression is equivalent to 6.317x+ 19?
    8·2 answers
  • What is m∠M? I don't exactly remember how to do this type on problem...
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!