Find the solution of this system of equation’s

x - 8y = 21
3x - 8y = 15

Answers

Answer 1
x=21+8y
3(21+8y)-8y=15
63+24y-8y=15
16y=-48
y=-3
x-8(-3)=21
x+24=21
x=-3

Related Questions

Candy is sold out in 4 pound bags. How many full

Answers

Full what exactly it is not specified what you need

-
How many solutions does the equation 2 + 6(x - 4) = 3x - 18 + 3x have?

A)0
B)1
C)2
D) Infinite

Answers

Answer:

C because it's a quadratic equation and it can be solved by factorization and completing the square method and also general formula

Jessica has £600.
She gives 50% to her mother.
Jessica gives 10% to her brother.
She keeps the rest.
How much money does Jessica keep?

Answers

Answer:

she keeps 270

Step-by-step explanation:

have of 600 is 300 10 percent of 300 is 30

300-30 is 270

Find the slope of the line that passes through (1, 13) and (10, 6).

Answers

Answer:

-7/9

Step-by-step explanation:

Using the slope formula

m = ( y2-y1)/(x2-x1)

   = ( 6-13)/(10-1)

    = -7/9

A car is 200 inches long. A truck is 50% longer than the car. How long is the truck?

Answers

If a truck is 50% longer than the car, then its 1.5x.

200 * 1.5

= 300

So the truck is 300 inches

*50% of 200 is 100.

100+200=300* would be your answer.

this question has already been answered in Brainly.I am just giving you the answer of what someone else said.*CREDIT GOES TO:izzykissel*

This should help.

Write an equation in point-slope then convert into slope intercept for a line that passes through (3,-2) with a slope of -2

Answers

Answer:

Point-slope form: [tex]y+2=-2x+6[/tex]

Slope intercept form: [tex]y=-2x+4[/tex]

Step-by-step explanation:

[tex]y - y_{1} = m * (x - x_{1})[/tex]

[tex]y-(-2)=-2*(x-3)\\y+2=-2x+6\\y=-2x+4[/tex]

What is the answer to 30a + 15b + 14b =

Answers

Answer:

30a + 29b

....................

Answer:

30a + 29b is the answer

We just need to add

If the start Time is 8:00 and the end time is 11:00.a.m,what is the elaped time? ?​

Answers

Answer:

3 hours

Step-by-step explanation:

PLZ SOLVE THIZZZ.............................

Answers

Answer:

B

Step-by-step explanation:

Answer: Angle x = 77 degrees

B. Alternate Angles

Step-by-step explanation:

Use the graph to answer the following…

Answers

Answer:

slope = 2 because it goes up by 2 and across 1

10 = 2(1)+b

10=2+b

-2   -2

b = 8

y intercept = 8

equation: y = 2x+8

yes it is proportional because it has a constant rate of change or slope

x+y+y+x+8+9+638763863278432842647823

Answers

Answer:

2

+

2

+

6

3

8

7

6

3

8

6

3

2

7

8

4

3

2

8

4

2

6

4

7

8

4

0

Step-by-step explanation:

Find the commission,
Earning Commission
Sales Commision Rate Commission
$710
6%
?

Answers

Answer:

$42.60

Step-by-step explanation:

(6/100)×710

= $42.60

y+4=-7(x-3)
can someone pls explain I'm so confused? In needs to be in slope int form

Answers

Answer:

so slop int form is y=mx+b

so start off by distributing the -7 to the x and -3

so that leave you with y+4=-7x+21

get it all on the same side

y-7x-17

Step-by-step explanation:

Answer:

y =  m x  +  b .

y  =  − 7 x  +  17

Step-by-step explanation:

Hope this helps!!! :))

1. It takes you 2 hours to travel 110 miles. How far can you travel in 5 hours?

Answers

Answer:

275 miles

Step-by-step explanation:

110/2 = 55 miles

you travel 55 miles an hour

multiply that by 5 to get your answer

equals 275 miles

Hope this is helpful.

Answer:

275 miles in 5 hours

Step-by-step explanation:

110/2 is 55. 55 is 1hour so multiply 55 times 5 and thats your answer.

2 1/6 divided by 3/4

Answers

Answer:

Exact form = 26/9

Decimal form = 2.8

Mixed number form = 2 8/9

Step-by-step explanation:

Hope this helps

Heyy , can you help me do this question

Answers

Answer:

1/6 studets

Step-by-step explanation:

The answer is 30 students

Complete the given ordered pairs for the equation.
y= 2x + 7
(7, )
(0, )
(-5, )

Answers

* means multiply

y = 2 * 7 + 7 = 14 + 7 = 21 -> (7,21)

y = 2 * 0 + 7 = 0 + 7 = 7 -> (0,7)

y = 2 * -5 + 7 = -10 + 7 = -3 -> (-5,-3)

To the nearest tenth, what is the BEST estimate of the value 5√10

Answers

Answer:

15.8 i think

Step-by-step explanation:

Explain why 50 is not a multiple of 6.

Answers

Answer: A multiple is a number that can be divided by another number a certain number of times without a remainder. A factor is one of two or more numbers that divides a given number without a remainder. Therefor, 50 could not be a multiple of 6.

Step-by-step explanation:

pls pls do this it is very important

Answers

Answer:

6x+3+2x+8

6x+2x+3+8

8x+11x

x^2 - 8x + 5 = 0

(a) find the value of the discriminant

(b) state the number and type of the roots (2 real, 2 imaginary/complex or 1 real).

Answers

Answer:

√44

2 Real Roots

Step-by-step explanation:

Looking at the image attached, the discriminant is the value under the square root.

In the equation given:

a = 1

b = -8

c = 5

The discriminant is therefore:

√(b²- 4ac) = √(-8²- (4*1*5)) = √(64-20) = √44

√44 is a positive number. Because it is positive, there must be 2 real roots.

If it were negative, there would be 2 imaginary roots.

If it were zero, there would be 1 real root.

Find the value of X - triangle measurments
I WILL GIVE BRAINLIEST!

Answers

180/3=60
4x-20=60
4x=80
x=20

Answer:

x = 20

Step-by-step explanation:

from how the sides are marked it is an equilateral triangle, to see it does not seem. assuming that it is equilateral it has 3 angles of 60 ° for which 4x - 20 = 60

4x - 20 = 60

4x = 80

x = 80 : 4

x = 20

-------------------

4 * 20 - 20 = 60°

what is 5 1/8 = ?/? please answer ty

Answers

Answer:

the awnser is in fraction form

[tex] \frac{41}{8} [/tex]

need help with math

Answers

Ah sorry I got it wrong, dear

B. 1/2

Explanation: 1/4 of grape juice as already in the bottle and then a mixture containing orange, grape and apple filled the bottle meaning the mixture was 3/4. If the mixture contained equal amounts of each juice it means 1/3 of each juice was in the mixture so 1/4 plus 1/4(the original amount of grape juice that was in the bottle before the mixture was added) is equal to 2/4 simplify that and you have 1/2

A car gets 20 miles per gallon. How many gallons would the car need to travel 90 miles?

Answers

Answer: In decimal the answer is 4.5 but if in fraction the answer is 4 1/2

Step-by-step explanation: First we have to divide 90 and 20 will give us 4.5 or 4 1/2

90 x 20 = 4.5 or 4 1/2

Hope this help!!!

Use your function rule to complete each statement. Type the correct answer in each box. Use numerals instead of words.

After 3.5 days, the height of the plant is ____ centimeters.

The height of the plant is 6.25 centimeters after ____ days.

Answers

Hii!

After 3.5 days, the height of the plant is 5.75 centimeters.

h = 0.5(3.5) + 4

h = 1.75 + 4

height = 5.75 cm after 3.5 days.

The height of the plant is 6.25 centimeters after 4.5 days.

6.25 = 0.5d + 4

6.25 - 4 = 0.5d - 4

2.25 = 0.5d

2.25/0.5 = 0.5d/0.5

4.5 = d

days = 4.5

Thus, the height of the plant is 6.25 centimeters after 4.5 days.

After 3.5 days, the height of the plant is 5.75 centimeters and the height of the plant is 6.25 centimeters after 4.5 days.

What is a straight line?

A straight line is a combination of endless points joined on both sides of the point.

The slope 'm' of any straight line is given by:

[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]

The equation of the line is:

h = 0.5d + 4

After rewriting the function:

f(x) = 0.5x + 4

Plug x = 0

f(0) = 4 cm

f(1) = 4.5 cm

f(2) = 5 cm

f(3) = 5.5 cm

f(4) = 6 cm

f(5) = 6.5 cm

Plug x = 3.5 days

f(3.5) = 5.75 cm

Plug f(x) = 6.25

6.25 = 0.5x + 4

2.25 = 0.5x

x = 4.5 days

Thus, after 3.5 days, the height of the plant is 5.75 centimeters and the height of the plant is 6.25 centimeters after 4.5 days.

Learn more about the straight line here:

brainly.com/question/3493733

#SPJ5

Mrs. Katz is planning a family vacation. She bought 8 rolls of film and 2 camera batteries for $23.00. The next day, her daughter went back and bought 6 more rolls of film and 2 batteries for her camera. This bill was $18.00. What was the price of a roll of film and a camera battery?

Answers

The price of rolls of film is $2.50 and the price camera batteries is $1.50.

of Two equations can be derived from the  question:

8f + 2b = 23 equation 1

6f + 2b = 18 equation 2

Where:

f = rolls of film

b = camera batteries

In order to determine the value of f, subtract equation 2 from 1

2f = 5

Divide both sides of the equation by 2

f = 2.50

In order to determine the value of b, substitute for f in equation 1:

8(2.50) + 2b = 23

20 + 2b = 23

2b = 23 - 20

2b = 3

b = 1.50

To learn more about simultaneous equations, please check: brainly.com/question/23589883

La casa de Camilo está a 4 cuadras a la derecha de la casa de Andrés, la casa de Rodrigo está a 2 cuadras a la izquierda de la casa Camilo ¿Cuántas cuadras hay entre las casas de Andrés y Rodrigo?.

Answers

La casa de Rodrigo está dos cuadras a la derecha de la casa de Andrés.

En esta pregunta, debemos leer el enunciado y obtener las ecuaciones equivalentes antes de obtener su solución. En este caso tenemos las siguientes dos ecuaciones:

(i) La casa de Camilo está a 4 cuadras a la derecha de la casa de Andrés.

[tex]c - a = 4[/tex] (1)

(ii) La casa de Rodrigo está a 2 cuadras a la izquierda de la casa de Camilo.

[tex]r - c = -2[/tex] (2)

Si sumamos (1) con (2), entonces obtenemos la siguiente ecuación entre las casas de Andrés y Rodrigo:

[tex]r - a = 2[/tex]

En síntesis, la casa de Rodrigo está dos cuadras a la derecha de la casa de Andrés.

Invitamos cordialmente a ver esta pregunta sobre aritmética: https://brainly.com/question/6357882

My little sister needs help, "A class of 30 students is collecting pennies for a school fundraiser. If each student collects 400 pennies, how many pennies are collected in all?"

Answers

Answer:

it would be 12,000 :)

Step-by-step explanation:

Multiply 30 with 400! Hope it helps!

Jada mixes 2 3/5 liters of fruit juice with 1 7/10 liters of seltzer to make a fruit punch.

Complete the steps to find the amount of fruit punch


what is the sum of the fraction parts?

Answers

Answer:

3 9/10

Step-by-step explanation:

2 3/5=  2 6/10

17/10= 1 3/10

6/10+3/10=9/10+2+1=3 910

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