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
Anettt [7]
2 years ago
11

the cost of old boiler is £775 per year,the new one is £1850 ,the cost of using a new boiler will be 1/5 less than the cost of u

sing the opd boiler. how many years will it take for the savings feom cost of using nthe new boiler to total £1850​
Mathematics
1 answer:
Tanya [424]2 years ago
4 0

Answer:

I think its 12.3 years

Step-by-step explanation:

a fifth of 775 is 155 and 155 x 12.3 = 1850

You might be interested in
Help please quickly!!!!!!1
IgorLugansk [536]

Answer:

9

Step-by-step explanation:

As per the problem, the given triangle is a right triangle. This is signified by the box around one of its angles, this box states that the angle it is surrounding is a right angle.

Since it is a right triangle, one can use the Pythagorean theorem to solve this problem. The Pythagorean theorem states that; (a^2 + b^2 = c^2), where (a) and (b) are the legs of the right triangle, or the sides adjacent to the right angle. (c) is the hypotenuse or the side opposite the right angle.

Substitute in the given values and solve, note that (a) represents the unknown leg (side).

a^2 + b^2 = c^2\\\\a^2 + (\sqrt{19})^2 = (100)^2\\\\a^2 + 19 = 100

Inverse operations,

a^2 + 19 = 100\\-19\\\\a^2 = 81\\\\a = \sqrt{81}\\\\a = 9

8 0
3 years ago
Calculate the perimeter for the parallelogram if a= 7.6 , b= 5.9 and c= 14.6
kolezko [41]

Although the problem gives the value of b, it's really not needed.

Opposite sides of a parallelogram are congruent, so we just need to calculate: 2a + 2c = P

Plug the given values in:

2 * 7.6 + 2 * 14.6 = 44.4 units, or choice (C).

4 0
3 years ago
How to make percent to decimal?<br><br> ex. 76% = #/#
ZanzabumX [31]
You just move the decimal place over twice. Ex: 76% = 0.76
5 0
2 years ago
Read 2 more answers
How to write Q={1,2,3,5} in set builder form?<br>​
blagie [28]

Answer:

{x:x is a natural number less than 6}

Step-by-step explanation:

Set builder is a type of set where we have to represent any value inside a set

by using the variable x, v, b, a, c etc.

Eg A={1,2,3,4}

For eg {a: a is a natural number less than 5}

8 0
1 year ago
Write -621,000 in scientific notion
Nuetrik [128]

Answer:

-6.21 x 10^5

Step-by-step explanation:

The negative only comes when the numbers are in the decimal to right such as 0.1 when its on the left side it just mean positive power such as 6.0= a positive, negative power = 0.6 count how many numbers there are (6) then get the last number as the whole number and the rest are behind (-6.21) count all the numbers besides the last number (6) now that is your power so you get -6.21 x 10^5

6 0
3 years ago
Read 2 more answers
Other questions:
  • Someone help me with my homework
    7·2 answers
  • 3. To divide by a fraction, you must first ?<br> the divisor and then change division to ?
    10·1 answer
  • car traveled 576 mi averaging a certain speed. If the car had gone 8 mph​ faster, the trip would have taken 1 hour less. Find th
    5·1 answer
  • Mr.smith and mr.Stein We’re driving to a business meeting 100 miles from their office. Mr.smith Drove the first y miles ,then mr
    15·2 answers
  • The Russo-Japanese War was a conflict between Russia and Japan that started in the year 190419041904. Let xxx represent any year
    11·2 answers
  • ​The county soccer club spent $1680 for soccer camp expenses. This amount is 12% of the money it collected. What is the total am
    10·1 answer
  • Estimate, then add. Write each sum in the simplest form.
    7·1 answer
  • Savannah had 2 bags of leaves raked by 11 a.m.. If she continued at this rate, how many bags of leaves would she have raked by 2
    7·2 answers
  • Which answer choice is it?
    9·1 answer
  • Can someone please help me
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!