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
Anestetic [448]
3 years ago
8

Find the values of a and b so that the solution of the linear system is (5,2)

Mathematics
2 answers:
True [87]3 years ago
8 0
5*a+2*b=23
5*a-2*b=7:
a=(23-2b)/5
b=(7+5a)/2:
a=(23-2*(7+5a)/2)/5
5a=23-7-5a
5a+5a=23
a=23/10
b=(7+5*23/10)/2
b=(7+23/2)/2=(37/2)/2=37
AVprozaik [17]3 years ago
7 0

Answer: a = 10 and b= 4

Step-by-step explanation:

x =5 y = 2

5a + 2b = 23-------(1)

5a - 2b = 7---------(2)

(1) -(2)

4b = 16

b = 16/4

b = 4

also, (1) + (2)

10a =30

a = 30/10

a = 3

You might be interested in
HELPOOPPPPPPPPPSBSBBSHSHABDBNSKA
NNADVOKAT [17]

Answer:

Step-by-step explanation:

5 0
3 years ago
Kyle mows4 lawns a day 4 day a week 4 week a month and 4 months a year he makes $25 per lawn how much money did he make last yea
denis-greek [22]

Lets break this down step by step.

4+4+4+4=16 lawns a week.

16+16+16+16=64 lawns a month.

64+64+64+64=256 lawns a year.

Then we take 256 x $25 to get $6,400 last year.

6,400<---Answer

-Seth

8 0
3 years ago
Maria’s phone bills were $95, $67, $43, and $115. What was the mean, or average, of her phone bills?
Pavel [41]
The answer is 80$.........
6 0
3 years ago
Read 2 more answers
HELP PLEASE!! Will mark brainliest to correct answer
swat32

Answer:

45

Step-by-step explanation:

KL- because triangle is a isosceles

(base angles are congruent)

8 0
2 years ago
Anyone have any idea? i dont have any idea
ladessa [460]

Answer:

\tt f(x)=2x^2+20x-10

let y=f(x)

\tt y=2x^2+20x-10

\tt 2x^2+10x=y+10

\tt x^2+10x=\frac{1}{2} y+5

\tt x^2+10x+25=\frac{1}{2} y+30

\tt (x+5)^2=\frac{1}{2} (y+60)

\tt 2(x+5)^2=f(x)+60

\boxed{\tt f(x)=2(x+5)^2-60}

Hope it helps! :)

8 0
2 years ago
Other questions:
  • Mrs. Favicchio has 72 students in her science class. how many packets of pH paper does she need to order?
    9·1 answer
  • The probability that an event will occur is fraction 2 over 3 . Which of these best describes the likelihood of the event occurr
    14·1 answer
  • How do you write 0.35 as a fraction in simplest form
    7·1 answer
  • Gcf of 35 and 15 and 3
    14·2 answers
  • Training has saved $425 to spend during her 14-day vacation about how much money can she spend a day
    14·2 answers
  • Which value of x would make TV || OS?<br> 3<br> 8<br> 10<br> 11
    10·1 answer
  • Please help me with this one
    5·2 answers
  • The diagonals of a square measure 20. what is the length of a side of the square​
    15·1 answer
  • Select all the equations on which the point (10,0) lies
    15·2 answers
  • Which expression is equivalent to
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!