Mathematics High School



Solve the system of equations - X - Y = 3 and 6x + 2y = -30 by
combining the equations

Answers

Answer 1

Answer:

X= -6, Y= 3

Step-by-step explanation:

1)

- X - Y = 3

- X - 3= Y

Y= - X - 3

2)

6X + 2Y = -30

3X + Y = -15

Y = -15 - 3X

3) Combine

- X- 3 = - 15 - 3X

- X = -15 - 3X +3

-X + 3X = - 12

2X = - 12

X= - 6

4)

- X-Y=3

-(-6) - Y = 3

-Y= 3-6

-Y= - 3

Y = 3

Answer: X= -6, Y= 3

{

6x + 2y = -30, 6(-6)+2(3)= -30

}

Related Questions

Could someone Help pleasee ??!

Answers

Answer:

sorry if im wrong

Step-by-step explanation:

no

no

yes

yes

Write an equation for the graph below.

Answers

Answer:

y= 25x

Step-by-step explanation:

Answer:

The line can be defined as y = 25x.

Step-by-step explanation:

First we find two points that this falls on.  (0, 0) and (200, 8) clearly visible points that it falls on.  If we take common factors out of that, we get (1, 25).

With those points, we have the slope of the function.  Slope is equal to Δy/Δx, so in this case its 25/1 or just 25

Normally, to define a line, we would take a point on it and use it as reference, defining the line as (y - y1) = s(x - x1).  In this case though, because the line intersects point (0, 0), we don't even need to translate it.  We can simply say:

y = sx

We already have our slope of 25, so the our line function is:

y = 25x

A company was able to incite staff from 100 employees to 214 employees. What was the percentage increase in staff

Answers

Answer:

114%

Step-by-step explanation:

A company was able to incite staff from 100 employees to 214 employees. What was the percentage increase in staff?

Percentage Formula is given as:

New value - Old value/Old value × 100%

New value = 214

Old value = 100

Hence:

Percentage increase = 214 - 100/100 × 100

= 114/100 × 100

= 114 %

Therefore, the percentage increase = 114%

Jordan runs 20% of a marathon relay race. If a
marathon course is 25 miles long, how many miles
does Jordan run?
I’m

Answers

Answer:

5

Step-by-step explanation:

Answer:

5 miles

Step-by-step explanation:

Take 20% of 25, you can do this by multiplying the decimal form of 20% by 25:

0.20 x 25 = 5

Radius of a cylinder is 6 inches and the
height is 13 inches. Find the exact
volume of a cylinder.
Volume =

Answers

Answer:

V≈1470.27

Step-by-step explanation:

V=πr2h=π·62·13≈1470.26536

PLS HELP DUE AT MIDNIGHT

Answers

Answer:

x=8

Step-by-step explanation:

10x-20=7x+4

This is because the two angles are vertical.

10x-7x=4+20

3x=24

x=8

Answer:

x = 8

Step-by-step explanation:

10x - 20 = 7x + 4

3x = 24

x = 8

The two circles shown have the same center
To the nearest centimeter, how much greater is the circumference of the
larger circle?
A
7 cm
11cm
B
16 cm
43 cm
22 cm
44 cm

Answers

Answer: 7

Step-by-step explanation:

11 1/2 - 4 1/2 = 7

what's the percentage of change from 20 is decreased to 11​

Answers

Answer:

The percentage is 45 percent.

Step-by-step explanation:

in how many ways can 20 ants march in a line

a. 20!
b. 18!
c. 15!
d. 56289

Answers

The answer to your question would be D!

Answer:

20

Step-by-step explanation:

PLEASE MARK BRAINLIEST

25% of what number is 20

Answers

Answer:

100

Step-by-step explanation:

Determine the slope (8grade

Answers

Answer:

-2.5

Step-by-step explanation:

The slope is the rate.

I believe the Answer is 2.5

If you add Natalie's age and Fred's age, the result is 43. If you add Fred's age to 4 times
Natalie's age, the result is 88. Write and solve a system of equations to find how old Fred and Natalie
are.

Answers

Answer:

106

Step-by-step explanation:

they are 21 and 22 so you are going to do 21 times 4 which is 84 then add 22 to 84 and you get 106

21•4=84+22=106

HELP DUE AT MIDNIGHT

Answers

8 and 4 are corresponding angles

Answer:

Will you give brainliest? I know the answer. Only if you would give brainliest.

Step-by-step explanation:

which expression has the largest value each has 9/16 as the factor

Answers

Answer:

1 2/3 x 9/16

Step-by-step explanation:

Prove this
ASAP PLSSS

Answers

Answer:

its now proved

Step-by-step explanation:

Answer:

using this identies

easy too solve this question

Which table of ordered pairs represents the linear equation y= -2x - 3

PLEASE HELP I DONT HAVE MUCH TIME

Answers

Answer:

x=1 y=-5 x=3 y=-9 x=0 =-3

Step-by-step explanation

Hope it helps!

five horses can plow 20 acres of land how many can 21 horses plow

Answers

Answer:

84

Step-by-step explanation:

What is the greatest common factor of 46 and 16?

Answers

Answer: The greatest common factor is 2
the greatest common factor is 2

There are 35 boys out for football. This is about 5% of the total enrollment. How
many total kids are in the school?

Answers

Answer:

700  

Step-by-step explanation:

35/x = 5/100

cross-multiply:

5x = 3500

x = 700

A local boys club sold 196 bags of mulch and made a total of $565. It sold two types of mulch: hardwood for $3.25 a bag and pine bark for $2.75 a bag. How many bags of each kind of mulch did it sell?

The boys club sold
bags of hardwood mulch and
bags of pine bark mulch.

Answers

Answer:

96

Step-by-step explanation:

What is the equation of a circle whose center is at the origin and whose radius is 16?

x 2 + y 2 = 4
x 2 + y 2 = 16
x 2 + y 2 = 256

Answers

X2 + Y2 = 256

Best luck with your studying

Answer:

x^2 + y^2 = 256

good luck and have an awesome Day/Night

can someone pls help.​

Answers

Answer:

25

Step-by-step explanation:

multiply then add hoped that helped

Answer:

25 and 9

Step-by-step explanation:

help me pls need help

Answers

Answer:

9s+11

Step-by-step explanation:

Combine like terms → (7s+2s and 2+9 = 9s and 11) and boom

Answer:

[tex]9s + 11[/tex]

Step-by-step explanation:

First:

[tex]7s - 2s \\ = 9s[/tex]

second:

[tex]9 + 2 \\ = 11[/tex]

Are triangles congruent if three pairs of corresponding sides are
congruent? Pls help me.

Answers

Answer:

if triangles are congruent if three pairs of corresponding sides are

congruent.to made a congruent triangle

following axiom need to fulfilled.

A.S.A AXIOMS.S.S. AXIOMS.A.S. AXIOM

Answer:

to my knowledge yes they are

Step-by-step explanation:

Karma's sock drawer has 8 striped socks, 4 polka dot socks, 6 fuzzy socks, and 2 socks with holes. What is the probability that she randomly chooses a sock with holes on her first grab, returns it to the drawer and picks another sock with holes in it?

Answers

Answer:

quite low, but not impossable.

Step-by-step explanation:

Maxine has a poster of her favorite ascertaining in her bedroom. The poster is 2.5 feet tall and 1.3 feet wide.what is the area of the posters 

Answers

Answer:

3.25 ft

Step-by-step explanation:

A = bh

A = (2.5)(1.3)

A = 3.25

Answer:

3.25 ft

Step-by-step explanation:

A =bh

A =(2.5)(1.3)

A =3.25

If h(x) = −4x − 10, find h(−3) and h(1)
Plzzzzz help me asap.

Answers

Answer:

h(-3)= 2

h(1)= -14

Step-by-step explanation:

Subsitute the number in parentheses into the equation

h(-3):

-4(-3)-10

12-10

= 2

h(1):

-4(1)-10

-4-10

= -14

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Answers

Answer: hey Andrew Davila it’s green Z

Step-by-step explanation:

Answer:

it might be Green z

Step-by-step explanation:

because there is only three (Z) and one (X) so it represents Green Z

I hope it works out

A scenery is painted on a paper 44cm long and 30cm wide such that there is a margin of 2cm along each of its sides. Find the total area of the margin.

Answers

Answer:

280 cm²

Step-by-step explanation:

The computation of the total area of the margin is shown below:

Given that

Length = 44 cm

Breadth  = 30 cm

Area of the cardboard = 44 × 30 cm² = 1,320 cm²

Now

Length of the painting eliminating the margin is

= [44 - (2 + 2)] cm

= 40 cm

And,

Breadth of the painting eliminating the margin is

= 30 - (2+ 2)

= 26 cm

Now

Area of the painting eliminating the margin is

= (40 × 26) cm²

= 1,040 cm²

And, finally the total area of the margin is

= (1,320  - 1,040) cm²

= 280 cm²

The product of 5 and a number is 30. Write and solve an equation to find the
missing number

Answers

Answer: 5x=30  your number is 6

Step-by-step explanation:  The product is multiplying so 5 times a number is 30. you divide the 5 over and you get 6.

Other Questions
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