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
kodGreya [7K]
3 years ago
15

A man age is three times his sons age. ten years ago was five times his sons age. find their current age.

Mathematics
1 answer:
kow [346]3 years ago
4 0

Answer:

The son is 20

The man is 60

Step-by-step explanation:

We can set up this equation with what we know. Let <em>m</em> stand for the Man's current age, and let <em>s</em> stand for his son's current age.

We know the Man's current age is three times that of his son, so this equation can be written as: <em>m = 3s</em>

Ten years ago means the man's current age <em>minus</em> 10 years. So it is <em>m-10</em>. So ten years ago he was 5 times his son's age 10 years ago, <em>5(s-10)</em>

This can be written as: <em>m-10=5(s-10)</em>

Solve with either substitution or elimination, the choice is yours, it doesn't really matter which method you use. I'll be using substitution.

<em>m-10=5(s-10)</em>

<em>3s-10= 5s-50</em>

<em>40=2s</em>

<em>20 = s</em>

The son is <em>20</em> years old.

We know the man is currently 3 times his son's age, because <em>m=3s</em>, so just solve for m since you now know the value of <em>s.</em>

<em>m=3s</em>

<em>m=3(20)</em>

<em>m=60</em>

The man is <em>60</em> years old

You might be interested in
Write as many equations as possible that could represent the relationship between
IgorC [24]

Answer:

a) Here we have:

"In Family A, the youngest child is 7 years younger than the oldest, who is 18"

Let's define:

Y = age of the youngest child.

O = age of the oldest child.

Then we know that:

Y = O - 7

O = 18

Then we can replace the second equation into the first one:

Y = 18 - 7 = 11.

b) Here we have:

"In Family B, the middle child is 5 years older than the youngest child."

Let's define:

Y = age of the youngest child.

M = age of the middle child.

Here we have only one equation:

M = Y + 5.

5 0
3 years ago
The surface area of a rectangular prism
Alexxandr [17]
Rectangular prism and cuboid are same

5 0
2 years ago
Help please i rlly need it
jonny [76]
The answer is C.7/3 pi ft lmk if you want more answers
8 0
2 years ago
A bag contains blue and yellow marbles. Two marbles are drawn without replacement. The probability of selecting a blue marble an
igomit [66]
Let b = blue marbles
y = yellow marbles
 Sum = b+y
 The <span>chance of a blue marble being drawn first is:
b / (b+y) = 0.55 
</span>The <span>chance of a blue marble being drawn first then a yellow next is:
</span>b / (b+y) * <span>y / (b+y-1) = 0.37</span>
This can be solve easily by using a theorem of Bayes 
0.37/0.55 = .67 or 67%
4 0
3 years ago
If the radius of a circle is 8 inches, what is the area. Use the formula shown below, and round the answer to the nearest hundre
gogolik [260]

A≈201.06in²

A=πr2=π·82≈201.06193in²

8 0
2 years ago
Read 2 more answers
Other questions:
  • Given x=-3, y=6, and z=-4 xz/-2y
    8·2 answers
  • Help me please anyone I ready don’t know this?
    12·1 answer
  • The sum of 1/6, 2/3, and 1/4 is
    10·2 answers
  • Since all circles are similar, a proportion can be set up using the circumference and diameter of each circle. Substitute the va
    12·2 answers
  • 2) Jose has a new job and earns a salary of $48,000. Victor has a new job and earns a salary of $59,000. Jose will receive a sal
    5·2 answers
  • 5) (5x2 + 4) — (5 + 5x3)
    13·1 answer
  • Which best explains why all equilateral triangles are similar?
    5·2 answers
  • A coffee shop sells their coffee beans by the pound. The table below shows the cost, in dollars, for a pound of two different ty
    6·1 answer
  • David had a coupon for the grocery store. He graphed on the x-axis what his total bill would be if he didn’t use the coupon and
    5·2 answers
  • One plane take of at 8:09P.M. And lands at 10:53PM. Another plane takes off at 9:14P.M. And lands at 12:31P.M. For how long were
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!