All categories

3 years ago

Is (–5, –1) a solution to the equation y = 5x?

Mathematics

1 answer:

Mamont248 [21]3 years ago

4 0

Answer:

-1=5(-5)

-1=-25

nope

Step-by-step explanation:

You might be interested in

Tyra is training for a bicycle race. Each week she rides a total distance greater than 10 kilometers and less than or equal to 3

Tamiku [17]

12, 18, 24, or 30 miles in one week

7 0

3 years ago

Read 2 more answers

Evaluate ab if a = -16 and b = -5.

Kaylis [27]

9514 1404 393

Answer:

Step-by-step explanation:

ab is the product of 'a' and 'b'. For the given values, that is the product ...

ab = (-16)(-5) = 80

_____

When the number of minus signs is even, the resulting product is positive.

8 0

3 years ago

A sells and article to B at a profit of 10%,B sells it to C for rs577.50 at a profit of 5%.How much did it cost for A?

densk [106]

Answer: $500

<u>Step-by-step explanation:</u>

A sells to B at a profit of 10%: 1.10A = B

B sells to C for $577.50 at a profit of 5%: 1.05B = 577.50

Substitute B with 1.10A in the second equation:

1.05(1.10A) = 577.50

1.155A = 577.50

A = 500

7 0

3 years ago

Any help on this?<br> Y=3x+7 <br> Y=x+1

denis23 [38]

Answer:

The answer is (x,y)=(-3,-2)

Step-by-step explanation:

I used the comparison method because I dont know what type of method you needed, sorry. The methods I know would be: the Comparison Method (what I used), the Substitution Method, Elimination Method,Inverse Matrix Method, Cramer's Rule, and the Gauss-Jordan Method.

You can also rewrite this equation to 3x-y=-7 and x-y=-1.

I'm sorry, I dont know what kind of answer you're looking for. I really hope this helps.

7 0

3 years ago

100 Points! What are the classifications of each system?

alexdok [17]

Answer:

Part 1) Is a inconsistent system

Part 2) Is a consistent independent system

Part 3) Is a consistent dependent system

see the attached figure

Step-by-step explanation:

we know that

If a system has at least one solution, it is said to be consistent .

If a consistent system has exactly one solution, it is independent .

If a consistent system has an infinite number of solutions, it is dependent

If a system not have solution, it is said to be inconsistent

Part 1) we have

$x+5y=-2\\x+5y=4$

This system of linear equations has two parallel lines (their slopes are equal) with different y-intercept

The lines don't intersect

The system has no solution

therefore

Is a inconsistent system

Part 2) we have

$y=3x+4\\-2x+y=4$

we know that

If two lines have different slopes, then the lines intersect at one point and the system of equations has one solution

In this problem, the lines have different slopes (m=3 and m=2)

The lines intersect at one point

The system has one solution

therefore

Is a consistent independent system

Part 3) we have

$3x+y=4$ ----> equation A

$-6x-2y=-8$ ----> equation B

Multiply equation A by -2 both sides

$-2(3x+y)=-2(4)$

$-6x-2y=-8$ ----> equation C

Compare equation B and equation C

Are identical lines

The system has infinity solutions

therefore

Is a consistent dependent system

4 0

3 years ago