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
umka2103 [35]
2 years ago
10

7 years ago father was 7 times as old as his son was. three years hence, he will be three times as old as his son find their pre

sent ages.​
Mathematics
1 answer:
EastWind [94]2 years ago
8 0

Answer:

son = 10 , father = 40

Step-by-step explanation:

Let Five years ago the age of son be x years and age of father be 7x years

Present age of son =x+5

Present age of father =7x+5

5 years later their age will (x+10) and (7x+10)

∴7x+10=3(x+10)

7x−3x=20

4x=20

x=5

So, the present age of son=x+5=5+5=10years

and the present age of father=7x+5=35+5=40years

hope it helps you

You might be interested in
Negativite eleven is less than negativte one
brilliants [131]
False -11 is furter on the number line then -1
6 0
2 years ago
Read 2 more answers
John is building a fence around his home currently his fence measures 14 feet on each side but he wants to increase only the wid
nalin [4]

Answer:

The dimensions of rectangular fence are 14 feet and 20 feet.

Step-by-step explanation:

We are given the following in the question:

Length of rectangular fence = 14 feet

Width of fence = (14+x) feet

Area of rectangular field = 280 square feet

Area of rectangular field =

A= \text{Length}\times \text{Width}

Putting the values, we get,

280 = 14(14+x)\\\\14 + x = \dfrac{280}{14}\\\\14 + x = 20\\x =20-14\\x = 6

Thus, the dimensions of rectangular fence are 14 feet and 20 feet.

7 0
3 years ago
Which of the following expressions are equivalent to - -a/b
riadik2000 [5.3K]

Answer:

B) -\frac{a}{-b}

Step-by-step explanation:

1. First, we have to know that two negatives equal positive.

2. Given the information above, -\frac{-a}{b} can simplify to \frac{a}{b}.

3. Let's go through each answer choice and see which one also simplifies to \frac{a}{b}.

A:

  • \frac{a}{-b}
  • -\frac{a}{b}

B:

  • -\frac{a}{-b}  
  • \frac{a}{b}

Therefore, the answer is B) -\frac{a}{-b}.

4 0
2 years ago
Evaluate the expression (-4+4i)(1+4i)(1+4i) and write the result in the form a+bi
allsm [11]

Answer:

Step-by-step explanation:

Since 2 of the 3 binomials are identical I would start the distribution there.

(1 + 4i)(1 + 4i) = 1+8i+16i^2

I'm sure you have learned in class by now that i-squared is = to -1, so we can make that substitution:

1 + 8i + 16(-1) which simpifies to

1 + 8i - 16 which simplifies further to

-15 + 8i.  Now we need to FOIL in the last binomial:

(-15 + 8i)(-4 + 4i) = 60-60i-32i+32i^2

Combine like terms to get

60-92i+32i^2

Again make the substitution of i-squared = -1:

60 - 92i + 32(-1) which simplifies to

60 - 92i - 32 which simpifies, finally, to a solution of:

28 - 92i

8 0
3 years ago
Solve for x by finding the missing side of the triangle. Round your answer to the nearest tenth ​
Alika [10]

Answer:

i thought i had the answer but then i got it wrong im sorry

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is the surface area of a sphere with a radius of 11 units?
    13·2 answers
  • The volume of a cube is 729 cubic units. What is the side length of the cube?
    9·1 answer
  • Let f(x) = 4x - 5 and g(x) = 6x - 3. Find f(x) - g(x).
    7·2 answers
  • The volume of a? cone-shaped hole is 49 pi ft cubed . If the hole is 3 ft? deep, what is the radius of the? hole?
    6·1 answer
  • Ellen saved $2000 and she spent 10% of it to buy a bike. Kim saved 8% more than that of Ellen's left savings. If Lisa saved 60%
    14·1 answer
  • A bank offers two special high-interest savings accounts if you deposit $500 and leave it untouched for 10 years. One pays 6 per
    9·1 answer
  • The athletic departments at 10 randomly selected U.S. universities were asked by the Equal Employment Opportunity Commission to
    10·1 answer
  • Explain how you know...?
    11·1 answer
  • What is the value of x in the equation x - y = 30, when y = 15?<br> O4<br> O 8<br> O 80<br> O 200
    5·1 answer
  • Find the variable (this is special right triangles unit)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!