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3 years ago

Find the solution to the system 4x−7y=−12 −4x+3y=12

Mathematics

1 answer:

Nataly [62]3 years ago

3 0

Answer:

(x, y) = ( -51/4 , -9)

Step-by-step explanation:

if u want me to show the work lmk

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Can you help me solve this equation?

dem82 [27]

Sure

Answer:

x = -2

If the steps aren't belong to the lesson that you want, just tell me the lesson title so I can get the answer for you !!!!

...

The steps

Multiply all terms by (x-3)(x+3) and cancel:

x(x+3)+2x(x−3)=18

3x2−3x=18(Simplify both sides of the equation)

3x2−3x−18=18−18(Subtract 18 from both sides)

3x2−3x−18=0

3(x+2)(x−3)=0(Factor left side of equation)

x+2=0 or x−3=0(Set factors equal to 0)

x=−2 or x=3

Check answers. (Plug them in to make sure they work.)

x=−2 (Works in original equation)

x=3 (Doesn't work in original equation)

7 0

1 year ago

7 increased by a number w

amid [387]

Answer:

The answer is

$w + 7$

8 0

2 years ago

Read 2 more answers

5. During the election for class president,

Alex Ar [27]

60 more students voted for Kevin

Step-by-step explanation:

Given

total students = 300

Voted for Jennifer = 40%

Voted for Kevin = 60%

We will find number of students for one of them and then will subtract from total to find the others.

So,

Students who voted for Jennifer:

$= 40\%\ of\ 300\\=0.40*300\\=120\ students$

Students who voted for Kevin

= $=Total\ students-Students\ who\ voted\ for\ Jennifer\\=300-120\\=180\ students$

In order to calculate that how many more students voted for Kevin :

180-120 = 60

Hence,

60 more students voted for Kevin

Keywords: Percentage

Learn more about percentage at:

#LearnwithBrainly

4 0

2 years ago

Where are you were a problem that can be described by the division expression 9 1/3÷2 3/4 use complete sentences in your answer

svp [43]

Answer:

365 days you got it you got it

Step-by-step explanation:

3 0

3 years ago

It is estimated that 45% of people in Fast-Food restaurants order a diet drink with their lunch. Find the probability that the f

mixer [17]

Answer:

So, the probability is P=0.041.

Step-by-step explanation:

We know that 45% of people in Fast-Food restaurants order a diet drink with their lunch.

We conclude that the probaility p=0.45 that a person order a diet drink.

We calculate the probability that the fourth person orders a diet drink.

We get:

$P=p^4\\\\P=0.45^4\\\\P=0.041\\$

So, the probability is P=0.041.

5 0

2 years ago