Mathematics High School

Solve the system of equations. Show all work!

x – y – 2z = 4
3x + y - z = 5
z = -3

Solve The System Of Equations. Show All Work!x Y 2z = 43x + Y - Z = 5z = -3

Answers

Answer 1

Answer:

x=0

y=2

z=-3

Step-by-step explanation:

x-y-2z=4    ...(1)

3x+y-z=5   ...(2)

adding

4x-3z=9   ...(3)

z=-3   ...(4)

put in (3)

4x-3(-3)=9

4x+9=9

4x=9-9=0

x=0

put in (1)

0-y-2(-3)=4

-y+6=4

y=6-4=2

x=0,y=2,z=-3

Related Questions

x - a = b; for x ..............

Answers

Answer:

x = b + a

Step-by-step explanation:

[tex]x - a = b\\\\x - a + a= b+a\\\\\boxed {x=b+a}[/tex]

Hope this helps.

the answer would be x=b+a because you have to add a to both sides since it is originally subtracted.

help plz ill give brainliest​

Answers

Answer:

b

Step-by-step explanation:

4 less than 3 times a number added to 7 gives 17​

Answers

Answer:

(3x + 7) -4 = 17

Step-by-step explanation: Thats the written equation if that is what you are asking for.

Which expression is equivalent to -6( -2/3 + 2x)

Answers

Answer:

4 - 12x

Step-by-step explanation:

-6 (-2/3 + 2x) =

(-6/1 * -2/3) + (-6 * 2x) =

4 - 12x

Answer:

4 - 12x

Step-by-step explanation:

trust

The "Pick 3" at horse racetracks requires that a person select the winning horse for three consecutive races. If the first race has eleven entries, the second race nine entries, and the third race seven entries, how many different possible tickets might be purchased?

Answers

Answer:

693

Step-by-step explanation:

To find the number of possible tickets that would be purchased we simply multiply the total number of choices that each race provides together. This would tell us how many combinations exist which in term is the same as the different possible tickets that can be purchased. Since the choices for the first race are 11, the second race 9, and the third race 7, we multiply these numbers together...

11 * 9 * 7 = 693 possible tickets

Solve 5x-4=3x+8
a. Model

b. Preform the step to have variables(circles) on only one side

c. Write the resulting step.

d. Preform the step to have the variables (circles) alone on one side

e. Write the Resulting step.

f. Divide the varibles (circles) ad numbers (squares) into equal groups.

Please help me :)

Answers

Answer would be 17474773838

If angle 3 is 49 degrees what is the measurement
of angle 6?

HELP PLS 15 POINTS!:)

Answers

Answer:

49 degrees

Step-by-step explanation:

the total degrees is 360

<1+<2+<3+<4=360 degrees

<5+<6+<7+<8=360 degrees

but <1=<4=<5=<8 and <2=<3=<6=<7

Are 67.13 and 63.10 equivalent decimals yes or No?

Answers

Answer: No

Step-by-step explanation:

67.13>63.10

Look at the each of the numbers, the first number is six in both of the decimals, now look at the second number in the first decimal the second number is 7, and in the second decimal the number is 3

7 is greater than 3 meaning these two decimals are not equal

WILL GIVE BRAINLIEST
A pair of sunglasses is discounted by 30%. The discounted price is $35. What was the original price of the sunglasses?
(Please show work!)

Answers

30 divided by .70 equals 50. So, if you do 50 times .30, you’ll get 35.

You borrowed $25 from your mom to buy clothes. A week later you repaid her $14. Which expression shows how much money you owe?
A)25-14=11
B)-25+14=-11

Answers

Answer:

a

Step-by-step explanation:

you can owe her -11, first of all

she gave you 25, you gave her back 14

25-14 to figure out what yo ustill owe

Answer:

answer is b

Step-by-step explanation:

it is a negative number you owe her that much

write an equation of the line with a slope of 4/5 and a y intercept of 0

Answers

Answer:

y = 4/5x

Step-by-step explanation:

slope intercept form is written as y = mx + b. the m represents slope, and the b represents y intercept. replace the variables with the numbers (since y intercept is 0, leave it blank) and you're left with y = 4/5x. hope this helps :)

The graph shows the locations of point C and point D. Point E is graphed at (n, 2).
The distance from point D to point E is equal to the distance from point D to point C.
What is the distance from point D to point E? What is the value of n? Enter your answers in the boxes.

Answers

Answer:

10.69

Step-by-step explanation:

daniel earns extra money as a lifeguard he earns 37 dollars for 4 hours and 64.75 for 7 hours. the relationship between his earnings and the time worked is proportional true or false?​

Answers

Answer: Yes, it is proportional.

Step-by-step explanation:

Find the amount Daniel earns each hour.

Divide the amount of money by the number of hours to find each earnings per hour.

Life guard:  $37 for 4 hours.

37/4 = 9.25

64.75/ 7 = 9.25

Since Daniel receives the same amount of money per hour which is $9.25 per hour, then the relationship is proportional.

Can someone help me to find the slope?

Answers

Answer:

y=-2x+5

Step-by-step explanation:

Which of the following are solutions to the inequality below? Select all that apply.
3j > 26

Answers

Answer:

j=11 and j=9

Step-by-step explanation:

3(4) > 26

12 > 26, which is false

3(11) > 26

33 > 26, which is true

3(9) >26

27 > 26, which is true

3(7) > 26

21 > 26, which is false

What is the domain of the given function ?

Answers

Answer:

I believe it is a. {x | x = -6, -1, 0, 3}, but I could be wrong.

Step-by-step explanation:

the correct answer is a.

What is the answer? g= 1+2a/a solve for a

Answers

I think the answer is 3 because 1 plus 2 equals 3

what is 4 divided by 1 third evaluated to

Answers

4 divided by 1/3 is the same as 4 time 3 so:

12
12. Hope this helps!!

1/2y+6x-36=0 I need help finding the equation for y

Answers

Answer: y=−12x+72

Add -6x to both sides.

You should get: 1/2y - 36 = -6x

Add 36 to both sides.  

1/2y = 36 - 6x

Divide both sides by 1/2.

Which gives you

y = -12x +72

I don't know if this is the answer you're looking for but hopes this helps

LaShea would like to invest her $100 in birthday money. Which option will give her the most money at the end of the investment period?
1 year at 8 percent
1.5 years at 7 percent
2 years at 6.5 percent
3 years at 4 percent

Answers

Answer:

3 years of 4 percent

Step-by-step explanation:

Answer:

3 years 4 percent

Step-by-step explanation:

please help a girl out:(( im not good at math:/

Answers

Answer:  [tex]\frac{15}{36}[/tex] , [tex]\frac{8}{36}[/tex]

LCD is 36

Step-by-step explanation:

[tex]\frac{5}{12} * \frac{3}{3} = \frac{15}{36}[/tex]

[tex]\frac{2}{9} * \frac{4}{4} = \frac{8}{36}[/tex]

15/36 18/36
Would be the answers

Choose the best unit (mm), (cm), (m), or (km) to measure each of the following.

Your best friend’s height
The thickness of a pepperoni slice
The distance from Chicago, Illinois to Melbourne, Australia

Answers

Answer:

Meters

millimeters

km

Step-by-step explanation:

which number is between 42.3 and 42.2

Answers

Answer:

42.25

Step-by-step explanation:

The ordered pairs (-4,3),(0,5),(1,1), and (7,-2) represents a relation. Determine the domain and range

ILL GIVE BRAINLEST HURRY UP THO

Answers

Answer:

Domain: {-4,0,1,7}

Range: {3,5,1,-2}

Step-by-step explanation:

Domain is the x values so : {-4,0,1,7}

Range is the y values so : {3,5,1,-2}

Hope this helps!

Answer:

Domain: {-4,0,1,7}

Range: {3,5,1,-2}

Step-by-step explanation:

Use the top guy's answer

SOMEONE PLEASE SOLVE. EASY POINTS PLEASSSSE.

Answers

Answer:

The second one

Step-by-step explanation:

ur welcome sire or madam which ever one you are

PLEASE HURRY!
Choose all the points that are located on quadrant lV.
Choices:
(-3,-1/4). (6,-9). (-5,3). (2,-4). (-11,5). (7,1/4)
Sorry about the picture it’s not very clear:/

Answers

(6,-9), (2,-4). Quadrant 4 locations are a positive number than a negative number.

y=6x-3 in standard form

Answers

Answer:

It would be 6x - y = 3.

That switch sides......hope that helped but...

I think y’all know what to do. Constant rate of change.

Answers

Answer:

-2 gal/min

Step-by-step explanation:

Express 40% as a fraction in lowest term

Answers

Answer:

4/10=2/5

Step-by-step explanation:

Answer:

2/5

Step-by-step explanation:

40/100 divide both sides by 20, and get 2/5

Will give brainliest

Answers

Step-by-step explanation:

60n=180

n=3

180(2-3)

360-540=-180

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