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
igomit [66]
2 years ago
10

Please solve this simultaneous equation, i'm not that good at it. 2r-s=10 rs-s^2=12

Mathematics
1 answer:
o-na [289]2 years ago
7 0

Answer:

s = 6, r = 8 or s = 4, r = 7

Step-by-step explanation:

2r - s = 10

2r = 10 + s

r = 5 + s/2 --(1)

rs - s^2 = 12 --(2)

sub (1) into (2):

(5 + s/2)s - s^2 = 12

5s + 0.5s^2 - s^2 = 12

-0.5s^2 + 5s - 12 = 0

s^2 - 10s + 24 = 0

(s - 6)(s - 4) = 0

therefore s = 6 or s = 4

when s = 6, r = 8 and when s = 4, r = 7

if you would like to discover more about simultaneous equations, you can have a look at my Instagram page (learntionary). I'll be posting mathematics related stuff there and some of my notes (simultaneous enq notes are already posted!)

You might be interested in
Need geometry help. ASAP pls & thanks
Sladkaya [172]

Answer:

1008.0 yd square

Step-by-step explanation:

6 0
3 years ago
Please help im timed
ss7ja [257]
-5 1/4x-21
7(-3-4x)-7(3)
7 0
3 years ago
Read 2 more answers
-7(8-6p) = -6p-8 I need help!!!!
elixir [45]

Answer:

p=1

Step-by-step explanation:

-7(8-6p)= -6p-8

-56+42p=-6p-8

-56+8=-6p-42p

-48=-48p

1=p

Hope this helps ;) ❤❤❤

4 0
3 years ago
tavyon can ride his bike at a constant rate of 12 miles per hour. how long would it take him to ride 66 miles
musickatia [10]

Answer: 5 1/2 hours

Step-by-step explanation:

1 hour = 12 miles

2 hours = 24 miles

3 hours  =36 miles

4 hours = 48 miles

5 hours = 60 miles

6 hours = 72 miles

66- 60 = 6. 6 is half of 12.

In conclusion, it will take Tavyon 5 1/2 (or 5.5) hours to bike 66 miles.

Hope this helps!

6 0
3 years ago
Who know the answer
Shkiper50 [21]
They just added 100 each time so i think the answer is b

3 0
3 years ago
Other questions:
  • Three consecutive integers have a sum of 30. Which equation can be used to find x, the value of the smallest of the three number
    7·1 answer
  • Log 3(x^2+6x)=log(2x+12)
    12·1 answer
  • What is x cube + x square
    6·1 answer
  • What verbal expression would this be: Half of t
    14·1 answer
  • What is the GCF of 16, 4089 and 689
    5·1 answer
  • Which function is best represented by this graph?
    14·1 answer
  • You spin the spinner twice.
    15·1 answer
  • I need help with this question
    10·2 answers
  • I don't get this help I'm in 5th :(
    15·2 answers
  • Evaluate the expression when x=-6
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!