Mathematics High School

x - y = 4 and x + y = 9

Answers

Answer 1

Answer:

5-1=4 and 5+4=9

Step-by-step explanation:

Answer 2

[tex]\huge\red{ƛƝƧƜЄƦ}[/tex]

System of Linear Equations entered :

[1] x - y = 4

[2] x + y = 9

Graphic Representation of the Equations :

y + x = 4 y + x = 9

Solve by Substitution :

// Solve equation [2] for the variable y

[2] y = -x + 9

// Plug this in for variable y in equation [1]

[1] x - (-x +9) = 4

[1] 2x = 13

// Solve equation [1] for the variable x

[1] 2x = 13

[1] x = 13/2

// By now we know this much :

x = 13/2 y = -x+9

// Use the x value to solve for y

y = -(13/2)+9 = 5/2

Solution :

{x,y} = {13/2,5/2}

Hope it Helps ☺

Related Questions

PLEASE HELP I DONT UNDERSTAND THIS AT ALL. IM CRYING. HELP ASAP!!!

Find the slope of the line that passes through the pair of points.

A(5, 4), B(8, –8)
a) 1/4
b) 4
c) –4
d) -1/4

Answers

Answer:

C. -4

Step-by-step explanation:

QUESTION 7, Saturday, October 10th, 2020

I have some geometry questions today. Please include your thoughts or reasoning with your answer. Please ignore the answer I selected for it was not an purpose. Thanks!

Answers

Answer:

DE≅JK

Step-by-step explanation:

already have aa need the side after or before the 2 angles

Answer:

DF≅JL

Step-by-step explanation:

We have one side and one angle, need one more side such that the angle is between those sides. It will make SAS congruency

So required sides are

DF≅JL

Write an equation for the description.
Ten times the sum of half a number x and 4 is 7.
Plzzzz hellpppppp mark you as brain leist

Answers

10 • x/2 + 4 = 7 is the equation

y = -1.25x - 2
y = - 25x + 2

please help, and show me how to get the answer please :)

Answers

The first one is 2.5 and the second would be -50 I’m not sure tho

steps for 540 + 6x = 810

Answers

Answer:

x = 45

Step-by-step explanation:

[tex]540 + 6x = 810[/tex]

Step 1 : Collect like terms

[tex]6x = 810 - 540[/tex]

Step 2 : Simplify

[tex]6x = 270[/tex]

Divide both sides of the equation by 6

[tex] \frac{6x}{6} = \frac{270}{6} [/tex]

Step 4 : Simplify

[tex]x = 45[/tex]

I hope it helps :)

Answer:

Well...X=45

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation:540+6*x-(810)=0

Pull out like factors :-270 + 6x = 6 • (x - 45)

Solve : x-45 = 0::

Add 45 to both sides of the equation: x = 45

Find the value of x
3x + 40
5x - 45

Answers

3x + 40 = 5x - 45

2x = 85

x = 42.5

Answer:

☆<《HOPE IT WILL HELP YOU 》>☆

Step-by-step explanation:

3x + 40

3x+40=0

3x= -- 40

x= -- 40/3

5x--45

5x--45=0

5x= 45

x =45/5

x = 9

find the slope of the line

Answers

Answer:

1/2

Step-by-step explanation:

Answer:

-1

Step-by-step explanation:

First off the slope is negative and it decreases by one unit each time.

what is the slope of the line on the graph?

Answers

Please post a picture than I will be glad to help

Answer:

Step-by-step explanation:

So you need to take two points off the graph. (x,y) and (x,y)

After that use those points to plug it into this equation

your gonna want to take the Y points from both and subtract from each other.

Do the same for the X points.

Y2-Y1

X2-X1

You'll then divide The Y by the X and that the Rise over Run. When you graph that. That'll be your answer.

The perimeter of a rectangle is found by multiplying the sum of the length, shown as LaTeX: ll, and the width, shown as LaTeX: ww, by LaTeX: 22. The length of a certain rectangle is LaTeX: 2020 . Which inequality shows that the perimeter of this rectangle is less than LaTeX: 5757 units?

Answers

Answer:

40 + 2W < 57

Step-by-step explanation:

Given that:

Perimeter of a rectangle (P) :

P = 2(length(L) + width(W))

If the length of a certain rectangle L = 20 ; which inequality shows perimeter of rectangle is less than 57 units

P = 2(length(L) + width(W))

40 + 2W < 57

I need to Know this Please.

Answers

Answer:

The last one is the answer

Clarissa sells handmade bracelets for each. The graph below shows her profits after expenses.

What does the point represent?

Answers

Answer:

Someone for real deleted my answer just because they got mad that I said theres no graph, I'm dead IMAO XD

Step-by-step explanation:

Answer:

where's the graph?

Step-by-step explanation:

PETS Last month, Hao's dog ate 40 cans
of dog food in 31 days. How many cans
should Hao buy to feed his dog for the
next 6 days?

Answers

Answer:

8 cans

Step-by-step explanation:

Answer:

8 cans

Hope I helped

Helppp!!! This has to be done by 8!!! And it’s 7:45!!

Answers

Answer:

The constant of porportionality is k = 12.5; the equation that describes the relationship is y = 12.5x.

Step-by-step explanation:

When you divide the miles by the hours, it's always 12.5, meaning that k must be 12.5.

If x is the hours and k is 12.5, the equation that describes the relationship is y = 12.5x.

HELP ME PLEAASE ITS URGENT!!! WILL GIVE BRAINLIEST

On a test, Marcus is asked to simplify . Here is his work:

√128 = √16 · √8 = 4√8

Which statement best describes Marcus' answer?

He is incorrect because 16 times 8 is not 128.

He is incorrect because he did not use the largest perfect square.

He is incorrect because the 4 and the 8 should be switched around in his answer.

He is correct.

Answers

Answer:

He did not use the largest perfect square

Step-by-step explanation:

4 [tex]\sqrt{8}[/tex] is the correct answer

What is square root ?

In mathematics, a square root of a number x is a number y such that y² = x; in other words, a number y whose square is x. For example, 4 and −4 are square roots of 16, because 4² = ² = 16. The square root of any number can be expressed using the formula: √y = y½. In other words, if a number has 1/2 as its exponent, it means we need to find the square root of the number.

Given,

[tex]\sqrt{128}[/tex]

we divide the number 128 by 2 four times, we get

= [tex]\sqrt{8*2*2*2*2}[/tex]

= 2*2[tex]\sqrt{8}[/tex]

=4 [tex]\sqrt{8}[/tex]

Therefore, 4 [tex]\sqrt{8}[/tex] is the correct answer

Answers

Answer:

(28 - 11.5) ÷ 5.5

Step-by-step explanation:

So let's examine this question.

We have already payed $11.50 the rent the canoe, so we have $16.50. Divide that by $5.50, and you get 3. So, 3 hours.

Now for the expression.

You start out with $28. You subtract $11.50 from it because it is being used to rent the canoe. You then divide your answer by $5.50 to determine how many hours you can use the canoe for.

Hmm.

(28 - 11.5) ÷ 5.5 = h

(28 - 11.5) ÷ 5.5 = 3

A bag of marbles has 4 Red and 3 Green marbles. You pick from the bag, replace the marble and then pick again. What is the probability of picking red both times?

A. 16/49
B. 12/42
C. 4/7

Answers

C because it is the only one reduced.

Lisa finds a treasure chest full of 1000 jewels: 600 emeralds, 300 sapphires, and 100 rubies. She stuffs her pockets full of jewels completely at random, but they can only hold 100 jewels. What is the probability that all 100 jewels she took were sapphires?

Answers

Given:

Total number of jewels = 1000

Emeralds = 600

Sapphires = 300

Rubies = 100 rubies

100 jewels she took randomly.

To find:

The probability that all 100 jewels she took were sapphires.

Solution:

Number of selected jewels = 100

Total number of jewels = 1000

We have to select 100 out of 1000.

So, the total number of outcomes [tex]=^{1000}C_{100}[/tex]

Number of sapphires = 300

We have to select 100 out of 300 sapphires .

So, the favorable outcomes [tex]=^{300}C_{100}[/tex]

Now,

[tex]\text{Required probability}=\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}[/tex]

[tex]\text{Required probability}=\dfrac{^{300}C_{100}}{^{1000}C_{100}}[/tex]

Therefore, the required probability is [tex]\dfrac{^{300}C_{100}}{^{1000}C_{100}}[/tex].

Find each unit rate. Round to the nearest tenth if necessary.

200 meters in 34 seconds

Answers

Answer:

Step-by-step explanation:

erics cell phone service costs $40.00 a month for unlimited calls. he also pays $0.02 for each text message he sends. what equation represents the total cost, c, in dollars, for when eric sends t text message

Answers

Answer:

40.021

Step-by-step explanation:

Unlimited calls = $40

Text message = $0.021

NOTE:There is a difference between the value you gave for cost of text messages in the question and the values given in the group of answers. I will use $0.021 for cost of text messages since it is common to all answer choices.

Total cost = Cost of unlimited calls + cost of text messages

C = $40 + $0.021

= $40.021

Therefore, the equation which represent the total cost in dollars for a month is 40.021

A. 40.021

Answer:

maluna1999live is correct the answer is 40.021 so if your going to give someone the brailest then it should be maluna1999live

Step-by-step explanation:

Angela’s and Ben’s Cell Phone Plan

Answers

Answer:

lol wdym.…......…..........

Fully simplify the expression-3xy/6x

Answers

Answer:

-1xy

-------

Step-by-step explanation:

divide all by 3

Answer:

−1/2x^2y

Step-by-step explanation:

Kalie pays $9.24 for 11 pounds of flour. What is the price per pound of flour?

Answers

Answer:

$0.84, 84 cents per pound.

Step-by-step explanation:

I hope that this helps. Have a good day!!

9.24 ÷ 11 = 0.84

y = –6x+2
–12x – 2y = –4
How many solutions does this linear system have?

one solution: (0, 0)
one solution: (1, –4)
no solution
infinite number of solutions

Answers

Answer:

infinite number of solutions

Step-by-step explanation:

y = -6x + 2 . . . . . . . . (1)

-12x - 2y = -4 . . . . . . (2)

Putting (1) into (2), we have

-12x - 2(-6x + 2) = -4

-12x + 12x - 4 = -4

-4 = -4

Therefore, the system has infinite number of solutions.

I hope this helps you! :3 :)

Answer:

infinte number of solutions

Step-by-step explanation:

HELLLPPPP ASAP. Explain how to find the product of 3/8 x 7/9. Use complete sentences in your answer.

Answers

Answer:

7/24

Step-by-step explanation:

you times the numerators together and times the denominators together then you simplify

2-10x=-8x-8 helpppp pleaseeee

Answers

Answer:x=5

Step-by-step explanation:1 step subtract 2 from both sides 2 step:simplify 3 step: add 8x to both sides 4 step: simplify 5 step: divide both sides by -2 6step: simplify x=5

I need help with 2,3,and 4!!!!!!!!

Answers

Answer:

Step-by-step explanation:

0_0 ni idea yo hablo español y me aparece todo en ingles

A plumber charges $50 to visit a house plus $40 for every hour of work. Write an expression to represent the total cost of hiring a plumber.

Let h = number of hours

Answers

Answer:

x = 50 + 40h

Step-by-step explanation:

you're welcimd

What is the y-intercept?
What’s the slop.? What is the equation of the line?

Answers

y intercept= -4

slope=1

equation= y=x-4

Answer:

Y intercept= -4

Slope= 1

Step-by-step explanation:

A rocket is launched from the launch pad at a speed of 700 km/hr. How far will the rocket have traveled after 1.0 hr?

Answers

Step-by-step explanation:

The answer is

Distance is 42000 kmph

The distance the rocket has traveled after 1 hour with a speed of 700km/hour is 700 km.

Given,

A rocket is launched from the launch pad at a speed of 700 km/hr.

We need to find how far will the rocket has traveled after 1.0 hr.

What is speed?

Speed is the ratio of distance per time.

Speed = Distance /Time

Its unit is km/hour or m/second.

We have,

Speed = 700 km/h

Distance = D

Time = 1 hour

From the speed formula:

Speed = Distance / Time

700 = Distance / 1

700 km / hour x 1 hour = Distance

Distance = 700 km

Thus the distance the rocket traveled after 1 hour with a speed of 700km/hour is 700 km.

Learn more about relative speed here:

https://brainly.com/question/28224010

#SPJ2

my question is,

$6.79 for 32 oz.

Answers

Answer:

What am i supposed to figure out

Step-by-step explanation:

Answer:

YOU HAVE TO FIGURE OUT HOW MUCH IT IS FOR 1 MAN

Step-by-step explanation:

Other Questions

is Lady Macbeth or Macbeth to blame for Macbeths downfall, and why do you say that ?(im trying to add more points to touch on in my essay) ty in advance :) 1. Which phrase best characterizes the relationship between the U.S. government and corporations that created monopolies?O complicated and uneasyO always hostileO reluctantly cooperativeO completely neutral You're Worth It! Your Perfect! I believe in you! Use the drop-down menus to indicate the point of view from which each sentence is narrated.Jamila marched into her brother's room and angrily asked him for the keys to the car.I was nervous on my first day of work, but soon I found that my coworkers were friendly and helpful.When you reach the center of the forest, you see that the path branches in two directions. A water balloon is dropped from 196 meters above the surface of Earth, from anairplane traveling at 98 m/s. What are the horizontal and vertical speeds of the balloonwhen it hits the ground if it takes 6.3 seconds to drop to the surface of Earth? Is this correct? If not, please tell me the correct answer!!! What is the equation of this line? explain the resistence ......?? follow me gyus HELP FRENCHfill in the blank with the correct conjugation of the verb in parentheses: Vous (danser)a. dansonsb. dansec. dansentd. dansez Which of the following is the correct formula used for calculating Speed?Speed = distance / timeSpeed = time / distanceSpeed = mass / time If r varies directly as t and r = 6 whent = 11, find the value of t when r= 24 If the maglev train travels at a constant speed of 480 kilometers per hour for 1/4 hour how far does the train travel ? what does Ca stand for in chem? Find the intercept form (-4,2), (4,7) Substitute the length of the sides (7 in, 25in n)into the Pythagorean theorem. Then, find the length of the missing side m(Please with step by step answer) True or False: Exercise is an underrated stress reliever and can be used to 25overcome mental, physical, and emotional battles."O TrueFalse Limiting factors in water bio mes include amount of saltamount of dissolved oxygenamount of sunlightall of the above find the slope of a secant line with the intervals of [0,1] Dehydration reactions remove two _____atoms and one______ atom, the equivalent of a water molecule.1. water2. polymers3. oxygen 4. ethanol5. catalases6. hydrogen7. nitrogen8. hydrolysis Evaluate a+4 when a=7 but how do you do it doe?