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
sasho [114]
3 years ago
12

3x-8y=-50 6y=x solve by substitution​

Mathematics
1 answer:
worty [1.4K]3 years ago
3 0

Answer:

Step-by-step explanation:

3x-8y=-50.........(1)

6y= x ..............(2)

Substituting x = 6y in (1)

3(6y) - 8y = -50

18y - 8y = -50

10y = -50

y = -50/10

y = -5

Putting y = -5 in (2)

6y = x

6(-5) = x

-30 = x

x = -30

You might be interested in
Without finding the inverse of the function determine the range of the inverse of F(x) = the square root of x-4
Nastasia [14]
The rang of an inverse function is the domain of the normal function
So you just gotta find the domain of that which is x is greater than or equal to 0
3 0
3 years ago
a train travels 288km at a uniform speed.if the speed has been 4km per hour more it would have taken one hour less for the same
Lostsunrise [7]

Given:

A train travels 288 km at a uniform speed.

If the speed has been 4 km per hour more it would have taken one hour less for the same journey.

To find:

The initial speed of the train.

Solution:

Let x km/h be the initial speed on the train.

New speed of train = (x+4) km/h

We know that,

Time=\dfrac{Distance}{Speed}

Time taken by the train initially to cover 288 km is \dfrac{288}{x} hours.

New time taken by the train to cover 288 km is \dfrac{288}{x+4} hours.

It is given that If the speed has been 4 km per hour more it would have taken one hour less for the same journey.

\dfrac{288}{x}-\dfrac{288}{x+4}=1

\dfrac{288(x+4)-288x}{x(x+4)}=1

288x+1152-288x=x^2+4x

1152=x^2+4x

0=x^2+4x-1152

Splitting the middle term, we get

x^2+36x-32x-1152=0

x(x+36)-32(x+36)=0

(x+36)(x-32)=0

x=-36,32

We know that the speed cannot be negative. So, the only possible value of x is 32.

Therefore, the speed of the train is 32 km/h.

3 0
3 years ago
Directions: List all congruent angles and write a proportion that relates the corresponding sides.
Klio2033 [76]

Answer:

Angle GHF ~ KHJ

Angle GFH ~ KJH

Angle FGH ~ JKH

Where side:

FH ~ JH

FG ~ JK

GH ~ KH

Step-by-step explanation: from the attached figure, the list of all congruent angles and the proportion that relate the corresponding sides are:

Angle GHF ~ KHJ

Angle GFH ~ KJH

Angle FGH ~ JKH

Where side:

FH ~ JH

FG ~ JK

GH ~ KH

Please find the attached file for the figure

4 0
3 years ago
14.
diamong [38]
Perpendicular bisector will find you the midpoint 
7 0
3 years ago
Number 5!! please <br><br><br><br><br><br> help me please
tensa zangetsu [6.8K]

Answer:

2500

Step-by-step explanation:

Profit means the amount of money you have leftover after you make money and then spend that money on rent and groceries or expenses. Profit is something positive, therefore the internet would be positive as well. Just remember:

Gross - Net = Profit

7 0
3 years ago
Other questions:
  • Fill in the blanks to make true number sentences.<br><br> 1 3/5 = __ : __
    5·1 answer
  • Which of the binomials below is a factor of this trinomial? (PLS ANSWER SOON AS POSSIBLE)
    11·2 answers
  • Elena packed 48 cubes into this box each Cube has edges that are 1 centimeter how many layers of Cubes did Elena make
    8·1 answer
  • Maria needs to buy some cardboard to build a box 12 inches long, 8 inches wide, and 10 inches high for her science project. How
    10·1 answer
  • The area of the regular octagon is 10.15 cm^2. What is the measure of the apothem, rounded to the nearest hundredth of a centime
    11·2 answers
  • Simplify -2 1/3 (-10 1/6)
    7·1 answer
  • For another recipe, Shane used 6 1/2 cups of all purpose flour to make 2 pizzas. How many cups of flour does the recipe require
    12·1 answer
  • Choose the comparison that is shown on the meter stick.
    12·1 answer
  • Mathematics Mathematics, 29.12.2020 18:30, lame3245 a grandfather is nine times older than his granddaughter. In 8 years the gra
    5·1 answer
  • Plz help due tonight
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!