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Yanka [14]
3 years ago
11

{y = 3x -1 {x-y = - 9

Mathematics
2 answers:
NeX [460]3 years ago
8 0
Always make sure both the equations have equal notations so 3x-y=1 and x-y=0
after the that u may use the normal simultaneous eqn and find values of x and y
photoshop1234 [79]3 years ago
8 0
Here, substitute the value of y from equation 1 into equation 2, 
x - y = -9
x - (3x - 1) = -9
x - 3x + 1 = -9
-2x = -9 - 1
x = -10/-2
x = 5

Now, substitute the value in 1st equation, 
y = 3(5) - 1 
y = 15 -1 = 14

In short, Your Answer would be: (5, 14)

Hope this helps!
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12 is 15% of what?<br> HELP
oksian1 [2.3K]

Answer:

80

Step-by-step explanation

Write down the equation: (15 / 100) * x = 12

Solve for x: x = 12 / (15 / 100)

x = (12 * 100) / 15

or, x = 80

   Hope this helps!

8 0
3 years ago
What is 1/7 divided by ? = 14
user100 [1]
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4 0
3 years ago
A seal went 15 below sea level to catch a fish. A sea lion dove 6 feet less than two times as deep as the seal to catch a larger
anygoal [31]

Answer:

2\times 15-6 = 24\ below\ sea\ level

Step-by-step explanation:

Given that:

Distance traveled by seal to catch the fish = 15 below sea level

Sea lion wanted to catch a larger fish so sea lion dove 6 feet lesser than two time the distance that the seal traveled.

To find:

The expression to represent the position of the sea lion in the sea.

Solution:

If the distance traveled by seal is represented by D then as per the question statement:

Twice of D = 2\times D

6 lesser than twice of D = 2\times D - 6

Now, putting the value of D = 15

Therefore, the expression to represent the sea lion's position w.r.to sea level.

2\times 15-6\\ = 24\ below\ sea\ level

5 0
3 years ago
What is a theory in science​
alina1380 [7]

A scientific theory is a validated explanation of some aspect of the natural world, based on multiple facts that have been frequently verified through research and experimentation. Fact theories are not "guesses" but reliable accounts of the real world.

3 0
3 years ago
How do you solve the system of equations for y=2x-4 y=4x-10?
SVEN [57.7K]
Set the equal to each other

2x-4=4x-10
6=2x
x=3
y=2(3)-4
  =6-4
y =2
8 0
3 years ago
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