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
den301095 [7]
3 years ago
15

Melvin is X years old . Jonathan is 5 years older than Melvin. their total age 10 year later is 85 years .Find the value of X​

Mathematics
2 answers:
kumpel [21]3 years ago
8 0

Answer:

X= 40

Step-by-step explanation:

X ×2+5= Jonathan age.

So, 85÷2-5 = <u>X</u>

X= 85÷2-5

=<u>4</u><u>0</u>

emmainna [20.7K]3 years ago
7 0

Answer:

<h2>30 years</h2>

Step-by-step explanation:

Age of melvin = X

Age of Jonathon = X + 5

After 10 years,

Age of melvin = X + 10

Age of Jonathon = X + 15

Now,

According to the question,

x +10 + x + 15 = 85

Collect like terms

2x +10 + 15 = 85

Calculate the sum

2x + 25 = 85

Subtract 25 on both sides

2x + 25 - 25 = 85 - 25

Calculate

2x = 60

Divide both sides of equation by 2

\frac{2x}{2}  =  \frac{60}{2}

Calculate

x = 30

Hope this helps...

Good luck on your assignment..

You might be interested in
Determine if the following conclusion is valid. Why or why not?
ludmilkaskok [199]

Answer:

The first option

Step-by-step explanation:

It is biased as her friends are all more likely to go considering how involved she is with it.

4 0
3 years ago
Write 10 x 10 x 10 x 10 x 10 x 10 with an exponent. Explain how you decided what exponent to write
valentina_108 [34]

10x10x10x10x10x10=1000000

{10}^{6}

means 10x10x10x10x10x10

as it's basically saying 10 is multiplied by itself 6 times which gives you 1000000

5 0
3 years ago
Read 2 more answers
9. A line contains L(-4,-4) and M(2, 3). Line q is in
algol13

don't know hahahahahahahau

5 0
2 years ago
A high school mathematics teacher can grade a set of exams in 7 hours working alone. If their student teacher helps​ them, it wi
Stels [109]

It takes 9 hrs 19.8 minutes  for the student teacher to grade the exams if they worked​ alone

<u>Solution:</u>

Let the efficiency of the school teacher be “x” and the efficiency of the student teacher be “y”

Here the word efficiency means the rate of doing work

Let the total work to be completed be W

According to the question,

The time taken by the school teacher to complete the work is 7 hrs.

So we can write it in equation form

W = x \times 7  ---- eqn 1

where W is the total work and x is the efficiency

Similarly for student teacher and school teacher doing the work simultaneously, we can write the equation as

W =(x +y ) \times 4

Equating eqn 1 and 2

x \times 7=(x+y) \times 4

7x = 4x + 4y

3x = 4y

So in ratio x : y = 4 : 3

Now putting value of x = 4 in equation (1) we get total work to be 28

Now, <em>total time taken by the student teacher = total work ÷ efficiency of student teacher</em>

Hence, total time taken by the student teacher = 28 ÷ 3 = 9.33 hrs

= 9 hrs 19.8 minutes

Hence it takes 9 hrs 19.8 minutes  for the student teacher to grade the exams if they worked​ alone

4 0
3 years ago
Diameter=10.5 in . Determine the area of each circle. Use 3.14 or 22/7 for pie . Round to the nearest tenth.
zloy xaker [14]

Answer:

86.5 square inches

Step-by-step explanation:

Area of circle: pi*r^2

  • first find the radius

10.5in /2= 5.25in

  • find the square

5.25^2=27.5625

  • multiply with pi

27.5625*3.14=86.54625

rounded 86.5 in

5 0
3 years ago
Other questions:
  • I have two Law Of Sines Problems that I need to Help Solved! Please!!
    12·1 answer
  • I'll mark the first and RIGHT answer brainliest! 20 POINTS
    7·1 answer
  • Gracie and kJ have chance left over from the grocery store Gracie has $56.78 and kJ has $3.99 how much more money does Gracie ha
    10·1 answer
  • Find two numbers whose sum is -39 and whose product is 10
    10·1 answer
  • How many millimeters are in 1 meter
    11·1 answer
  • Consider these dimensions for a cylindrical aquarium.
    11·2 answers
  • Will give brainlessst if you answer plsssss
    14·1 answer
  • What positive or negative integer represents you descending 15 feet into a cave?
    8·1 answer
  • A car’s wheels spin at 1000 revolutions per minute. The diameter of the wheels is 23 inches. You want to know how fast the car i
    11·1 answer
  • You deposit $350 at 2,5% for 3 years, How much interest do you earn?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!