Mathematics High School

Solve 5x + 4/y =7 and 4x + x/y =5 simultaneously.​

Answers

Answer 1

9514 1404 393

Answer:

  (x, y) ≈ (1.1642, 3.3930) and (3.4358, -0.39297)

Step-by-step explanation:

Solve the first equation for y, then substitute into the second.

  5x +4/y = 7

  4/y = 7 -5x

  4/(7 -5x) = y

Then the second equation becomes ...

  4x +x/(4/(7 -5x)) = 5

  4x +x(7 -5x)/4 = 5

  16x +7x -5x^2 = 20 . . . . . multiply by 4

  5x^2 -23x +20 = 0 . . . . . put in standard form

We can use the quadratic formula to solve this.

  x = (23±√((-23)² -4(5)(20)))/(2(5)) = (23±√129)/10

  x = 2.3 ±√1.29 ≈ {1.1642, 3.4358}

  y = 4/(7 -5x) = {3.3930, -0.39297}

Solutions are (x, y) ≈ (1.1642, 3.3930) and (3.4358, -0.39297).

Solve 5x + 4/y =7 And 4x + X/y =5 Simultaneously.

Related Questions

Input : 3 4 5 4 6 output: 20 25 30 35 40 (function or non function)

Answers

Answer:

no it isn't

because there are two 4 with differents outputs

Step-by-step explanation:

Answer:

No, it is not a function.

Step-by-step explanation:

There are two outputs for the same input of 4.

SOMEONE PLEASE ANSWER THIS CORRECTLY AND ASAP AND I WILL MARK YOU BRAINLIEST, GIVE YOU A GOOD RATE, AND GIVE YOU A "THANK YOU" HEART BUTTON THING JUST PLEASE SOMEONE ANSWER THIS ASAP AND CORRECTLY!!!!!!!!! THIS WILL GIVE ME A SCORE SO I WILL USE YOUR ANSWER AND SEE IF IT IS CORRECT FIRST AND THEN IF ITS CORRECT I WILL MARK YOU BRAINLIEST, GIVE YOU A GOOD RATE, AND GIVE YOU A "THANK YOU" HEART BUTTON BUT SOMEONE ANSWER THIS ASAP AND CORRECTLY!!!!!!!!!!!!

Answers

Answer:

y=x+4

Step-by-step explanation:

its right so can i have brainliest

Answer:

y=x+4

Step-by-step explanation:

The graph shows the favorite colors chosen by some middle school students.


Which statement is supported by the information in the graph?

A; Fewer than 30% of the students chose red, yellow, or orange as their favorite color.

B; More than 1/10 of the students chose pink as their favorite color.

C; Exactly 18% of the students chose blue as their favorite color.

D; Exactly 2/5 of the students chose green, black, or purple as their favorite color.

Answers

Answer:

I think C) Exactly 18% of students.... is correct

Step-by-step explanation:

Answer:

The answer is C

Step-by-step explanation:

just trust me

I am confused Help Me.

Answers

Answer:

circumference = 18.84

area= 28.26

Step-by-step explanation:

C= 2×3.14×3

A= 3.14×3²

You have a summer job that pays time and half over time ( if you work more than 40 hours) after that is 1.5 times you hourly rate of $7.00/ hr.

Answers

Answer:

Step-by-step explanation:

Having a job that pays at $7 per hour is quite nice. And the question says that if he does overtime, he gets 1 and a half times the normal price of $7. This means that, for every overtime he works, he will get paid at

7 * 1.5 = $10.5

The question didn't state what, but if it's anything to go by the wages expected to be paid then I'd say the job isn't worth it if it's overly stressful. I said so because most jobs out there aren't really about the workers, but the money instead.

13g=156 please show work

Answers

Answer:

g=12

Step-by-step explanation:

divide both sides by 13

13g=156

g=156/13

g=12

SOMEBODY PLEASE HELP ME it’s due at 11:59!

Answers

Answer:

4th answer

Step-by-step explanation:

clearly you can see that as time spent studying goes up, test score goes up, except for the third row, which is an outlier

brainliest pls :)

It’s answer number 4

Movie tickets cost $8 for children and $12 for adults. A movie theater has 300 seats. The theater wants to collect at least $4,800. Write a system on inequalities to model this situation.

Answers

Answer:

8x + 12y = 4800

[tex]\left \{ {{8x + 12y = 4800} \atop {x+ y = 300}} \right.[/tex]

Step-by-step explanation:

What expression can be used to determine the total cost of buying c pounds of cashews for $2.65 per pound and f pounds of flour for $0.94 per pound?


PLEASE HELP

Answers

If X = total, then the equation would be

X = 2.65(c) + .94(f)

Hi! I need help with asymptotes and just how to put them on a table? Here’s the problem that I’m stuck on. May someone PLEASE help me as well as give an explanation on how you got the answer? PLEASE IM BEGGING.

Answers

Answer:

x.   y

-1---2^-1=1/2

0---0

1----2

2----2*2=4

Step-by-step explanation:

x.   y

-1---2^-1=1/2

0---0

1----2

2----2*2=4

Help with fractions I don’t know

Answers

Answer: 5 5/6

Step-by-step explanation:

To divide fractions, use KCF (keep change flip)

2 1/3 = 7/3

the reciprocal of 2/5 is 5/2, so

7/3 x 5/2 = 35/6 = 5 5/6

LOOK AT PIC PLSS TYYYYY

Answers

Answer:

2.52 lbs=40.32 oz

Step-by-step explanation:

I used the mass formula and I even searched it.

2.52 lbs=40.32 oz

Hope this helps! :)

HELP AGAIN PLSS I WILL MARK YOU BRAINLIEST!​

Answers

Answer:

132

Total Area = Area of top rectangle+Area of trapezoid w/ bases 7 and 19

= base*height+(average of bases)(height of trapezoid)

= 7*4+8*(7+19)/2

= 28+104

= 132

Help!!!
If AB=4 feet & AD=10 feet & m What is DC?
What is BD?

Answers

DC= 4
BD= 10

Hope it’s right
Best luck with your studying

Answer:

DC=4 feet

Step-by-step explanation:

Opposite sides of a rectangle are equal.

what is the arc length of the crust of half of a pizza that is 6 inches in diameter? show all work

Answers

First, you find the circumference of the full pizza.
C=d * pi
C=6pi
Then you divide it by two, because it is half of a pizza.
C=3pi

Therefore, the arc length of the crust of half a pizza is 3pi inches.

Which equation describes the following relationship between x and y
Y is 8 less than x

Answers

Answer:

A. y = 2x^2 - 1

Step-by-step explanation:

Try the points of x and y by substitution

This gives us the function:

y = 2x^2 - 1

Look at the question below.

Answers

Answer:

C. 5x

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

the product is when you multiply 2 numbers.

Prove or disprove that the point (3, 2) lies on the circle centered at (-1. -1) and containing the point (4,-1)

Can someone help me?

Answers

need a picture of the plot

The perimeter of a rectangle is 40 cm. The length is 14 cm. Let x = width of the rectangle. Ravi says he can find the width using the equation 2(x + 14) = 40. Fran says she can find the width using the equation 2x + 28 = 40. Answer the questions to solve the equations and to compare the steps and solutions.

1. Which of these is the most helpful first step for solving Ravi's equation, 2(x + 14) = 40? Circle the best answer.
Add 14 to both sides
Subtract 14 from both sides
Divide both sides by 2
Multiply both sides by 2

2. What would your next step be?

3. Solve Ravi's equation, 2(x + 14) = 40, to find the width of the rectangle. Show your work.

4. Which of these is the most helpful first step for solving Fran's equation, 2x + 28 = 40? Circle the best answer.
Multiply both sides by 2
Subtract 28 from both sides
Divide both sides by 2
Add 28 to both sides

5. What would your next step be?

6. Solve Fran's equation, 2x + 28 = 40, to find the width of the rectangle. Show your work.

7. The two equations have different solution steps. Do they have the same solution? Use the distributive property to show why this answer makes sense.

Answers

Answer:

Step-by-step explanation:

1. Divide both sides by 2

  2(x+14) = 40

  x+14 = 20

2. Isolate the x term by subtracting 14 from both sides

3. x = 6. The width of the triangle is 6 cm.

4. Isolate the x term by subtracting 28 from both sides

  2x + 28 = 40

  2x = 12

5. Divide both sides by 2

6. x = 6

7. The two equations have the same solution, because by the distributive rule, 2(x+14) = 2x+28.

Answer:

Step-by-step explanation:

\1. Divide both sides by 2

 2(x+14) = 40

 x+14 = 20

2. Isolate the x term by subtracting 14 from both sides

3. x = 6. The width of the triangle is 6 cm.

4. Isolate the x term by subtracting 28 from both sides

 2x + 28 = 40

 2x = 12

5. Divide both sides by 2

6. x = 6

7. The two equations have the same solution, because by the distributive rule, 2(x+14) = 2x+28.

solve -3-0.5x+13=0.3x+6.2 please show work​

Answers

Answer:

x = 4.75

Step-by-step explanation:

Here is my work
And x=4.75

04- (Saresp–2008) Nas Lojas Compre Aqui, um micro-ondas pode ser vendido de duas formas: à vista por R$ 299,00 ou em 12 parcelas iguais de R$ 32,15. As amigas Giovana e Mariana compraram, cada uma, um micro-ondas nessa loja: a primeira, à vista e a segunda, a prazo. Assinale a alternativa que mostra a quantia que Mariana pagou a mais do que Giovana.
2 pontos
a) R$ 22,50.
b) R$ 86,80.
c) R$ 129,30.
d) R$ 266,85.
e) Não houve diferença​

Answers

Answer:

*-*

Step-by-step explanation:

Can anyone help me please ?
I’ll mark you as a brainliest.

Answers

I believe the answer would be c=12. i hope that’s what the question is asking for lol.

How to divide 15 into 3 equa lgroups

Answers

15 divided by 3 = 5 equal groups
5 hope I helped you!

Help as soon as possible!!

Answer only if you know!

At least answer one of them!

Answers

Answer:

1)9022.56euros

2)(m+11y)(-m+11y)

Step-by-step explanation:

12000/1.33=9022.56euros

tatiana earns money by baby sitting her little cousin. when she babysits for 2 hours she earns 27. when she babysits for 7 hours she gets 94.50 what is her total wages based on hours she worked

Answers

Answer:

13.50 per hour

Step-by-step explanation:

she makes 13.50 per hour, you know this ny dividing 27 by 2. If she makes 27 for 2 hours you just got to find half of 27 for 1 hour.

Answer:

13.50

Step-by-step explanation: i did an exam and got it correct

Who can help me with my homework.

Answers

Answer:

Slope is m = -3

find equation using two point formula-- y= -3x - 5

Find the sum. Write your answer in scientific notation.

(6.8 x 104) + (2.3 x 104) = 0

Answers

Answer:

9.464*10^2 is correct answer.

7 = a - 9.2/3 what is a?

Answers

Answer:

a= 151/15 or 10.06

Step-by-step explanation:

i hope this helps :)

What is A?
Answer
A=10.0666

4x^2 – 3x + 4 = 0
Use the discriminant to determine the number of real solutions for the quadratic equation. Pleaseee help!!!

Answers

Answer:

The number of solutions is the leading exponent of 2, thus there are two solutions.

I NEED HELP!!! PLEASE!!!

Answers

Answer:

i think its 360

Step-by-step explanation:

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