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
BartSMP [9]
3 years ago
9

2x + 4y = 12 y = x – 3 What is the solution to the system of equations?

Mathematics
1 answer:
sergeinik [125]3 years ago
8 0
2x+4y=12
y=x-3

Since we know what y equals, we can plug this into the first equation:
2x+4(x-3)=12
We can then distribute:
2x+4x-12=12
And solve for x:
6x-12=12
6x=24
x=4
We can then plug x into the second equation and find y:
y=x-3
y=4-3
y=1

Therefore x=4 and y=1
You might be interested in
A rectangle has the length of 2x+7 and the width of 9x find the area and the perimeter
seraphim [82]

Answer:

see explaination

Step-by-step explanation:

length (l) = 2x+7

width (b) = 9x

area of rectangle = l×b

=(2x+7)(9x)

=18x^2+63x

perimeter of rectangle = 2(l+b)

=2(2x+7)(9x)

=2(18x^2+63x)

=36x^2+126x

3 0
3 years ago
A mine elevator was at a depth of -120 feet. After 15 seconds, the mine elevator was at a depth of -30 feet. What expression can
Dafna11 [192]

Answer:

The answers to the given question are:

i.  The equipment elevator is at a depth of 176 feet (-176 feet), while the miner's elevator is at a depth of 210 feet (-210 feet) below the surface.

ii. The miner's elevator is deeper than that of the equipment.

The speed of an object is the rate at which the object moves.

i.e. speed =

Thus,

Speed of the equipment elevator = 4 feet per second

Speed of the miner's elevator = 15 feet per second.

Time of descent of the equipment elevator = 30 + 14

                                 = 44 seconds

So that, the distance of the elevator at this time is;

speed =

⇒ distance = speed x time

                  = 4 x 44

                  = 176

  distance = - 176 feet

The distance of the miner's elevator after 14 seconds is:

speed =

⇒ distance = speed x time

                 = 15 x 14

                 = 210

 distance = - 210 feet

Thus, after another 14 seconds, the equipment elevator is at a depth of 176 feet (-176 feet), while the miner's elevator is at a depth of 210 feet (-210 feet) below the surface.

Therefore, the miner's elevator is deeper than that of the equipment.

Step-by-step explanation:

done

4 0
2 years ago
Put the following equation of a line into slope-intercept form, simplifying all
Gnom [1K]
At the moment it’s in standard form. We can easily turn this into slope int form (y= mx + b) tho

3y= -18x -18
y= -6x - 6
7 0
3 years ago
Round the following 8.388 to 2 decimal places
Roman55 [17]
The answer will be 8.39 because the third number (8) is above 5 so you have to round up. Good luck!
3 0
3 years ago
Suppose that for a randomly selected high school student who has taken a college entrance exam, the probability of scoring above
Sophie [7]

Answer:

3.0

Step-by-step explanation:

n=10

p=0.30

mean=np=10X0.3 = 3

That is it.

5 0
3 years ago
Other questions:
  • write an equation of the line that passes through the given point and is parallel to the given line (4,7) y=5x-3
    12·1 answer
  • Is 7.4 and 7 2/5 equal to or less than or greater than
    12·2 answers
  • Solve for x.<br> 9/4 x = 8 1/2<br> A) 3 1/8<br> B) 3 7/8<br> C) 19 7/9<br> D) 19 1/8
    12·1 answer
  • What is a graph -2&gt;x
    7·1 answer
  • I(5, 3), J(5, -3), and L(-4, 3) are three vertices of rectangle IJKL. What are the coordinates of the fourth vertex, K, of recta
    14·2 answers
  • What is 7179.086667 rounded to the nearest hundredth?
    6·1 answer
  • James uses 1 1/2 cups of milk and 2 1/4 cups of flour for his favorite cookie recipe. This makes 60 cookies. How much milk and f
    14·1 answer
  • For reviewing purposes.
    6·1 answer
  • The difference between a number x and 3 is no more than 2
    13·2 answers
  • Please save me from this death trap
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!