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
Archy [21]
3 years ago
6

Solve by Substitution

Mathematics
2 answers:
anastassius [24]3 years ago
7 0

Answer:

-9x-10y=12  \ -----(1)\\\\-3x+3=y  \ ------(2)\\\\substitute \ y \ in \ (1)\\\\-9x -10(-3x+3) =12\\\\-9x+30x-30=12\\\\21x= 12+30\\21x=42\\x=2\\\\\\substitute \ x \ in  \ (2)\\-3\cdot 2+3=y\\-6+3=y\\y=-3

x= 2, y = -3

Pavlova-9 [17]3 years ago
5 0
X= 2 and y= -3
Just substitute the value of y into the first equation add like terms and solve
You might be interested in
Find the center and radius of the circle whose diameter has an endpoint at (-3, -4) and the origin.
Zina [86]

Given end points of diameter,

(x1,y1)=(-3,-4)

(x2,y2)=(0,0)

Now,

the equation of circle is,

(x-x1)(x-x2)+(y-y1)(y-y2)=0

or, (x+3)(x-0)+(y+4)(y-0)=0

or, x^2 +3x +y^2 +4y =0

or, x^2 +y^2 +3x + 4y=0

which is in the form of x^2 +y^2 +2gx +2fy + c=0

where,

g=3/2

h=2

c=0

Now,

radius(r) =  \sqrt{ {g}^{2}  +  {f}^{2} - c  } \\  =  \sqrt{ \frac{ {3}^{2} }{ {2}^{2} } +  {2}^{2}  - 0 }  \\  =  \sqrt{ \frac{9}{4}  + 4}  \\  =   \sqrt{ \frac{25}{4} }  \\  =  \frac{5}{2}

6 0
3 years ago
Lenny sold 576 tacos in 48 hours what was lenny's average rate of tacos sales
cupoosta [38]
If your looking for hourly they sold a total of 12 tacos per hour.
If your looking for daily they sold a total of 288 tacos per day.
4 0
4 years ago
Read 2 more answers
Write the equation of the line that passes through the points (-8,-5) (5,−8)
Nikolay [14]

Answer:

y=-3/13x-89/13

Step-by-step explanation:

m=y²-y¹/x²-x¹

m=(-8)-(-5)/5-(-8)

m=-3/13

y-y=m(x-x1)

y-(-8)=-3/13(x-5)

y+8= -3/13x+15/13

-8 -8

y=-3/13x-89/13

7 0
3 years ago
Can someone give me a linear equation word problem, and the answer to it
blondinia [14]
Raymond just got done jumping at Super Bounce Trampoline Center. The total cost of his session was <span><span>\$43.25<span>$43.25</span></span>dollar sign, 43, point, 25</span><span>. He had to pay a </span><span><span>\$7<span>$7</span></span>dollar sign, 7</span><span> entrance fee and </span><span><span>\$1.25<span>$1.25</span></span>dollar sign, 1, point, 25</span>for every minute he was on the trampoline.<span><span>Write an equation to determine the number of minutes </span><span><span>(t)<span>(t)</span></span>left parenthesis, t, right parenthesis</span><span> that Raymond was on the trampoline.</span></span>
5 0
3 years ago
18x 24x greatest common factor
zzz [600]
18x and 24x.....GCF = 6x
4 0
3 years ago
Other questions:
  • Matrix is handing out treats at a local protest to promote his new detective agency. He allows each participant to reach into hi
    9·2 answers
  • Thirty percent of all customers who enter a store will make a purchase. suppose that six customers enter the store and that thes
    11·1 answer
  • Jack had a score of 10 with 4 darts. What numbers did he hit?
    9·2 answers
  • According to the key of a particular park map, every 5 inches on the map represents 3 miles of trails in the park. how many inch
    13·2 answers
  • Joey asked all of his friends how many times they visited the zoo this year. The line plot shown here displays the responses tha
    6·2 answers
  • pears cost $0.92 per pound and apples cost a dollar $ 1.10 per pound mr.bonilla bought 3.75 pounds of pears and 2.1 pounds of ap
    11·2 answers
  • What does an algebraic expression always have?
    14·1 answer
  • How is the surface area of a prism determined?
    11·1 answer
  • What is 7x8 pls i need some help
    6·2 answers
  • Whoever answers this question correctly will get a 5.0 rating, thanks, and a brainlyist.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!