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lukranit [14]
2 years ago
7

HELP! Use the substitution method to solve the system of equations.

Mathematics
1 answer:
vivado [14]2 years ago
4 0

Answer:

No solution

Step-by-step explanation:

6x-2y = 5

-3x + y = 7 ----> y = 3x + 7 ( solve for y by adding 3x to both sides.

Substitute

6x-2(3x+7) = 5   Distribute

6x - 6x + 14 = 5  Combine like terms

14 = 5                 False statement

No solution

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· The list price of an article is 25% above the selling price and the cost
dem82 [27]

Answer:

p=25%

discount=25%

Step-by-step explanation:

Cost Price = 1.25 x - .4(1.25x)= 1.25x- .5x

Cost Price = .75x

S P = C+P

Profit = Selling price - Cost price

= x - 0.75x

=0.25x

the Profit is 25 %

Discount is 25 %

6 0
3 years ago
The sum of x and it’s opposite is always zero?
jeka94

Answer:

1) Let's consider the first case with the number 0 the oppose is also 0 and we have that 0-0=0 so then applies

2) Now let's consider any real number a no matter positive or negative we will have that:

a-a =0

Or in the other case:

-a -(-a) =-a +a=0

So then we can conclude that the expression is a general rule and is true

Step-by-step explanation:

For this case we can verify if the following expression is true or false:

The sum of x and it’s opposite is always zero?

If we want to proof this we need to show that for any number is true.

1) Let's consider the first case with the number 0 the oppose is also 0 and we have that 0-0=0 so then applies

2) Now let's consider any real number a no matter positive or negative we will have that:

a-a =0

Or in the other case:

-a -(-a) =-a +a=0

So then we can conclude that the expression is a general rule and is true

5 0
3 years ago
3(m+7)=6(m+2) what is m equal to?
pantera1 [17]

Answer:

see attached picture please

5 0
3 years ago
Read 2 more answers
I will give brainliest
hram777 [196]

Answer:

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Step-by-step explanation:

8 0
2 years ago
Solve the following equation algebraically<br>4x^2 = 100​
Licemer1 [7]

Answer:

x  = ±5

Step-by-step explanation:

4x^2 = 100​

Divide each side by 4

4/4x^2 = 100/4

x^2 = 25

Take the square root of each side

​sqrt(x^2) = ±sqrt(25)

x  = ±5

7 0
2 years ago
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