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
MArishka [77]
3 years ago
6

Solve the system of equations by substituting 15x+31y=−3 x=−y+3 ​

Mathematics
2 answers:
alekssr [168]3 years ago
6 0

Answer:

x=6   y=-3

Step-by-step explanation:

Angelina_Jolie [31]3 years ago
4 0

Answer:

x=6

y=-3

Step-by-step explanation:

Substitute (-y + 3) for x in the first equation:

15(-y+3)+31y=-3

Expand:

45-15y+31y=-3

Simplify:

45+16y=-3

Subtact 45 from both sides:

16y=-48

Divide both sides by 16:

y=-3

Substitute -3 for y in either equation:

x=-(-3)+3

x=6

You might be interested in
PLS PLS HELP ME THIS IS DUE TONIGHT
nika2105 [10]
I’m so confused?? what’s the question?
5 0
2 years ago
Read 2 more answers
A bag contains only red and blue marbles. Yasmine takes one marble at random from the bag. The probability that she takes a red
mamaluj [8]

Let red marbles = X.

The probability is 1 out of 5, written as 1/5

1/5 in terms of red marbles is equal to the number of red marbles divided by 5x, where 5x is the total number of marbles.

1/5 = x/5x 

Now you have 5x total marbles, x red and 4x blue. 

Add 5 more red and the new probability is: 

(x+5)/(5x+5) = 1/3 

Simplify:

3x+15 = 5x+5 

Now solve for x:

Subtract 3x from both sides:

15 = 2x +5

Subtract 5 from each side:

2x = 10 

Divide both sides by 2:

x = 10/2

X = 5

There were originally 5 red marbles.

5 0
3 years ago
2x = 4y + 8, x - 2y = 4
Evgen [1.6K]

Answer: x = 8, y = 2, coordinates (8,2)

Step-by-step explanation:

2x = 4y + 8 (divide by 2 to get value of x)

x = 2y + 4

(now substitute x into the second equation to find value of y)

2y + 4 - 2y = 4

2y - 2y = 4 - 4 (divide by 2 to get value of y)

y - y = 2 - 2

y = 2

Now plug in value of "y" to get value of "x".

x - 2(2) = 4

x - 4 = 4

x = 8

Coordinates (8,2)

3 0
2 years ago
Akira recives a prize at a science fair for having the most information project her trophy is in the shape of a square pyramid a
liberstina [14]

Answer:

12

Step-by-step explanation:

Because I think it is

4 0
2 years ago
The designer sketched a model of the pond. The model drawing had a circumference of 24 inches. What is the AREA of the model she
Delicious77 [7]

Answer:

Area of model pond = 45.6 inch² (Approx.)

Step-by-step explanation:

Given:

Circumference of circular pond = 24 inches

Find:

Area of model pond

Computation:

Circumference of circle = 2πr

Circumference of circular pond = 2πr

24 = 2[22/7][r]

Radius r = [24 x 7] / [2 x 22]

Radius r = 3.81 inch (Approx.)

Area of circle = πr²

Area of model pond = πr²

Area of model pond = (22/7)(3.81)²

Area of model pond = [3.1428][14.5161]

Area of model pond = 45.6 inch² (Approx.)

6 0
3 years ago
Other questions:
  • Someone Please helpppp!!!
    15·2 answers
  • 7t+2r-3t+r what is the answer
    14·2 answers
  • Please help me with this algebra 2 , its the very last question on the picture
    15·1 answer
  • Una torre de 28.2 m de altura esta situada a la orilla de un rio, desde lo alto del edificio el ángulo de depresión a la orilla
    9·1 answer
  • Which point is the reflection of point E across the y-axis what are it’s coordinates ??
    8·2 answers
  • The base of a triangle is 18 cm and its height is 7w-1 cm. Find the expression for the triangles area
    6·1 answer
  • Which pair of lines appears to be perpendicular?<br> ОА.<br> +XI<br> B
    10·1 answer
  • Introductory Algebra: 20% converted into a decimal, wouldn't that be 0.2?
    5·2 answers
  • PLEASE HELP FAST
    15·2 answers
  • HLP HLP HLP HLP 10 10 10
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!