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3 years ago

How many solutions does this system of equations have?

Mathematics

1 answer:

Vedmedyk [2.9K]3 years ago

8 0

Correct! This one is 'none' because the lines are parallel. Also, they have the same slope and y-intercept, but they differ after the equal sign, which means that their would be NO solutions to this.

Answer: None

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Help me with this quick pleaseeeee

melisa1 [442]

Answer:

D' = ( 1 , -1 )

Step-by-step explanation:

2 times 1/2 = 1

-2 times 1/2 = -1

hope this helps ^^

3 0

3 years ago

3k^2+12k-7kn-28n square meters and a length of 3k-7n meters.

melomori [17]

Step-by-step explanation:

here ! I used the formula area = length × width

and just some algrbric expressions solving

4 0

2 years ago

Mary works in a factory that produces t1000 telephones each day. when 30 phones were sampled, it was found that 9 were defective

nikklg [1K]

3/10 of phones are found defective each day. If 1,000 telephones are produced each day, about 300 of them will be defective.

4 0

3 years ago

Read 2 more answers

Derek‘s parents are finalizing a budget for his college expenses his first year of college will cost $1000 in expenses will incr

Alenkinab [10]

Answer:

$4779

Step-by-step explanation:

First you need to write an equation to model this situation. In this case it's f(x)=1000(1.12)^x. College usually lasts 4 years, so to find the total amount of money they need to budget, you need to find the sum of f(0), f(1), f(2), and f(3).

This is roughly equivalent to 1000+1120+1254+1405, which equals 4779.

8 0

4 years ago

Biff is 25 years older than Hannah today. Four years from now,Biff will be 6 times as old as Hannah will be. How old is Hannah t

gavmur [86]

Hannah is 1 year old today.

Step-by-step explanation:

Let,

Hannah = x

Biff = y

According to given statement;

y = x+25 Eqn 1

In four years;

y+4 = 6(x+4) Eqn 2

Putting value of y from Eqn 1 in Eqn 2;

$(x+25)+4=6x+24\\x+25+4=6x+24\\x+29=6x+24\\29-24=6x-x\\5=5x\\5x=5$

Dividing both sides by 5

$\frac{5x}{5}=\frac{5}{5}\\x=1$

As x is age of Hannah, therefore,

Hannah is 1 year old today.

Keywords: linear equations, substitution method

Learn more about linear equations at:

#LearnwithBrainly

4 0

3 years ago