Mathematics College

3x + y = 15 and y = 2x
The solution, given in (x,y) form is

Answers

Answer 1

Answer: (3, 6)

Step-by-step explanation:

3x + y = 15

y = 2x

Using substitution:

3x + 2x = 15

5x = 15

x = 15/5

x = 3

y = 2x

y = 2 * 3

y = 6

x = 3

y = 6

= (3, 6)

Related Questions

Sayid wants to buy 3 sweaters for $37 each and 2 scarves for $11 each.

How much will Sayid
spend on these pieces of
clothing?

Answers

the sweatshirts will be $12.33 and the scarves will be $22 so the answer it will be $34.33

Jori is 2 years older than Sage but 4 years younger than Victoria. Sage is 3 years less than a score. Sage is 17. In how many years time will jori be 30 yrs old?
please show explanation​

Answers

Answer:

10

Step-by-step explanation:

if sage is 17 and jori is 2 years older he will be 19 so in 10 years he will be 30

10 the answer to your question

Work out the area of the trapezium ABDE.

Answers

Answer:

(half * base 1 * base 2)/height

base 1 is 6 and base 2 is 9

get the height from similarity

6/9 = 8/CE

therefore CE = 72/6

Answer:

30cm²

Step-by-step explanation:

AE/BD = CE/CD

9/6 = CE/8

CE = 9/6 x 8

CE = 12cm

DE = CE - CD

DE = 12 - 8 = 4 cm

½(6 + 9)4 = 30cm²

The sum of four times a number and eight is between zero and twelve. Find the range of numbers.

Answers

2<x<3 or Anything between negative 2 and 3

Step-by-step explanation:

0<4x+8<12

-8<4x<12

-2<x<3

What’s 2*4 equal to in a Meath knowledge

Answers

Answer: 8

Step-by-step explanation:

I think the answer is 8

Ben wants to buy a new collar for each of his 5 dogs. The collars come in a choice of 9 different colors. Step 1 of 2 : How many selections of collars for the 5 dogs are possible if repetitions of colors are allowed

Answers

Answer:

59049 ways

Step-by-step explanation:

Given

[tex]Colors = 9[/tex]

[tex]Dogs = 5[/tex]

Required

Determine number of selection (repetition is allowed)

The number of collars is not given.

So, we'll assume that there are enough collars to go round.

If no repetition is allowed, each of the 5 dogs have 9 colours to select from.

i.e.

[tex]Dog\ 1 = 9[/tex]

[tex]Dog\ 2 = 9[/tex]

[tex]Dog\ 3 = 9[/tex]

[tex]Dog\ 4 = 9[/tex]

[tex]Dog\ 5 = 9[/tex]

So, the number of selection is:

[tex]Selection = 9 * 9 * 9 * 9 * 9[/tex]

[tex]Selection = 59049[/tex]

ASAP HELP!! sorry the photo is bad it’s the lighting but please help

Answers

Answer:

3

Step-by-step explanation:

15 7/8 - 5 3/4




please answer giving brainliest not promising but ill give it to best explained answer!

Answers

First, set ur denominator to lcm which is 8

15 7/8-5 6/8

= 10 1/8

if two fair coins are tossed simultaneously, what are the chances of both coming up 'heads'?​

Answers

Answer:

i think 1/4

Step-by-step explanation:

Answer:

[tex]\frac{1}{4}[/tex]

Step-by-step explanation:

We name the coins coin 1 and coin 2 for the sake of simplicity.

There are four possible situations:

coin 1 head, coin 2 head

coin 1 head, coin 2 tails

coin 1 tails, coin 2 head

coin 1 tails, coin 2 tails

Only case 1 results in both 'heads'. So the probability is 1/4.

hey please help
just tell me all the ones that work ​

Answers

Answer:

D and A and B i think

Step-by-step explanation:

I WILL BRAINLIEST PLS HELP ME I NEED HELP PLS ,
If 2 cm = 5 ft, what is the area of the playground?

Answers

Answer:

Step-by-step explanation:

Ok so

2 cm is 5 feet and there are 24

2 = 5

4 = 10

6 = 15

8 = 20

10 = 25

11 = 30

So for this one there are about . 10 feet at the top and 8 feet for the other

Answer:

The scale of the drawing is

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z-----> the scale drawing

x-----> the area of the playground in the scale drawing

y----> the area of the actual playground

we have

substitute

simplify

or

Divide by 4 both numerator and denominator

There are 8 bones in a large snake for 3 bones in a small snake. The small snake has 150 bones. How many bones does the large snake have?

Answers

Answer:

400!

Step-by-step explanation:

150/3= 50

50*8=400

Answer:

XD lol

Step-by-step explanation:

It was estimated that 650 people would attend the baseball game, but 683 people actually attended.
What is the percent error, to the nearest percent, of the estimate?
​

Answers

Answer:

5%

Step-by-step explanation:

33/650=0.0507

0.0507*100=5.07

please help if u can! :)))

Answers

Should be 11.53256.

Carmen deposits $4000 into an account that pays simple interest at a rate of 3% per year. How much interest will she be paid in the first 3 years?

Answers

Answer:

$360

Step-by-step explanation:

I = Prt

I = 4000 * 3 * 3%

I = 12000 * 3% (Convert 9000 and 3% into fractions.)

I =12000/1 * 3/100 (100 and 12000 have a GCF of 100)

I = 120/1 * 3/1 (Disregard the over 1 portion.)

I = 120 * 3 (Multiply 120 by 3 to get 360.)

I = $360

A restaurant customer left $1.80 as a tip. The tax was 5% and the tip was 20% of the after tax cost. Which information is not needed to compute the bill after tax and tip?​

Answers

Answer:

it's b

Step-by-step explanation:

How do I do this?
My son school just gave him this and he doesn’t know how to do it and I don’t know.

Answers

Answer:

I would just search online what are corresponding angles and then base it off of angles like angle number 4 is corresponding because corresponding angles are just angles with the same size and same line

Find the value of each.

4 boxes of pasta at $1.25 each

Answers

Answer:

The total of all the boxes would be $5.00.

Yea the total would be 5 dollars

What is 5-2(4a+1)+3a=13

Answers

Step-by-step explanation:

5-2(4a+1)+3a=13

5(4a+1)-2(4a+1)+3a=13

20a+5-8a-2+3a=13

20a-8a+3a+5-2=13

15a-3=13

15a=13+3

a=16

15

hope it helps.

........................​

Answers

Answer:

Step-by-step explanation:

Figure (1)

x° = 107° [Vertically opposite angles]

Since, vertical angles are equal in measure.

Figure (2)

x + 71° = 90° [Given, complementary angles]

x = 90° - 71°

x = 19°

Figure (3)

x + 21° = 180° [Given as supplementary angles]

x = 180° - 21°

x = 159°

Figure (4)

x = 129° [Vertical angles]

Figure (5)

x° = 90° [Given]

z° + 34° = 90°

z° = 90° - 34°

z° = 56°

Since, x° + y° + z° = 180° [Linear angles]

90° + y° + 56° = 180°

y° + 146° = 180°

y° = 180° - 146°

y° = 34°

On a winter morning, the temperature in pittsburgh is -13

Answers

that’s nice to know i guess? i don’t know where you’re trying to go with this-

Help please I’m begging you

Answers

Answer:

subtract to eliminate y

Answer:

B

Step-by-step explanation:

add to eliminate y

can some one please help me please

Answers

Answer:

x = 65.4

Step-by-step explanation:

I solved this question already. My explanation is here: https://brainly.com/question/20456072

Hope this helped! <3

can someone please help me with this by showing work? this is very hard for me so i asked here even though my questions never get responses sometimes

Answers

Answer is 4X^3 Y^5
Steps
4^2 = 16
X^6
Y^10

Answer and Step-by-step explanation:

The square root of 16 times x to the power of 6 times y to the power of 10 is the same as:

[tex]\sqrt{16x^{6} y^{10} } = \sqrt{16} * \sqrt{x^{6} } * \sqrt{y^{10} }[/tex]

The square root of 16 is 4.

The square root of x to the power of 6 is x to the power of 3.

The square root of y to the power of 10 is x to the power of 5.

So, the answer is:

[tex]4x^{3} y^{5}[/tex]

Hope this helps!

#teamtrees #WAP (Water And Plant)

Which of the following did you include in your answer? Yes, the graph has been dilated. Using the standard form of the equation, substitute in the values: h = –2, k = 3, x = –1, and y = 0. Solve the equation to get a = –3. Graphically, the parent function follows the pattern of right 1, up 1. Moving 1 unit to the right from the vertex, you can move down 3 units to get to the point (–1, 0), so it has been horizontally compressed.

Answers

Answer: just to press anyone it does not mark you for it lol

Step-by-step explanation:

Find the point of intersection for the two functions through substitution. Show
your work
f(x) = - 4x + 7
g(x) = 2x + 13
Your answer

Answers

I think answer should be 20 please give me brainlest let me know if it’s correct or not okay thanks bye

Need done ASAP 25 points!!!!!!!!

Answers

Answer:

Step-by-step explanation:

A

The answer should be A. I hope this helps so sorry if it’s incorrect

Question 1 (3 points)
(6.03)
Which expression shows a sum of three terms? (3 points)
O a
x3
3 + x + 3
Ob
ос
3x
Od
3(x + 3)

Answers

Answer:

more context please:)

Step-by-step explanation:

Answer:

3 + x + 3

Step-by-step explanation:

Hope it helps!

find each sum or difference for 381 1/10 -214 43/100

Answers

Answer:

The circled part is the answer.

Answer:

6789475

Step-by-step explanation:

16. What statement can be made about the distance between the vertices of a triangle and the circumcenter?
O the circumcenter is equidistant to all three vertices
the circumcenter is a different distance from each of the triangle's vertices
the circumcenter is closer to the highest vertex of the triangle
the circumcenter is closer to the vertices that make up the triangle's base

Answers

Answer:

O the circumcenter is equidistant to all three vertices

Step-by-step explanation:

Other Questions
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He raised a sightless face and listened intently as Negore's foot crackled a dead twig."Who comes?" he queried in a thin, tremulous voice."Negore," said the young woman, scarcely looking up from her task.Negore's face was expressionless. For many minutes he stood and waited. The old man's head had sunk back upon his chest. The young woman pressed and prodded the wasted muscles, resting her body on her knees, her bowed head hidden as in a cloud by her black wealth of hair. Negore watched the supple body, bending at the hips as a lynx's body might bend, pliant as a young willow stalk, and, withal, strong as only youth is strong. He looked, and was aware of a great yearning, akin in sensation to physical hunger. At last he spoke, saying:"Is there no greeting for Negore, who has been long gone and has but now come back?""Thou art my woman, Oona," Negore said, his tones dominant and conveying a hint of menace.She arose with catlike ease and suddenness to her full height, her eyes flashing, her nostrils quivering like a deer's."I was thy woman to be, Negore, but thou art a coward; the daughter of Old Kinoos mates not with a coward!""Old Kinoos and I came among you from a strange land. Thy people took us in by their fires and made us warm, nor asked whence or why we wandered. It was their thought that Old Kinoos had lost the sight of his eyes from age; nor did Old Kinoos say otherwise, nor did I, his daughter. Old Kinoos is a brave man, but Old Kinoos was never a boaster. And now, when I tell thee of how his blindness came to be, thou wilt know, beyond question, that the daughter of Kinoos cannot mother the children of a coward such as thou art, Negore."Again she silenced the speech that rushed up to his tongue."Know, Negore, if journey be added unto journey of all thy journeyings through this land, thou wouldst not come to the unknown Sitka on the Great Salt Sea. In that place there be many Russian folk, and their rule is harsh. And from Sitka, Old Kinoos, who was Young Kinoos in those days, fled away with me, a babe in his arms, along the islands in the midst of the sea. My mother dead tells the tale of his wrong; a Russian, dead with a spear through breast and back, tells the tale of the vengeance of Kinoos."But wherever we fled, and however far we fled, always did we find the hated Russian folk. Kinoos was unafraid, but the sight of them was a hurt to his eyes; so we fled on and on, through the seas and years, till we came to the Great Fog Sea"At last we came to Pastolik, which is where the Yukon drowns itself in the Great Fog Sea."So, when there came a ship, Old Kinoos stepped forward and said he would show the way. He was an old man then, and his hair was white; but he was unafraid. And he was cunning, for he took the ship to where the sea sucks in to the land and the waves beat white on the mountain called Romanoff. The sea sucked the ship in to where the waves beat white, and it ground upon the rocks and broke open its sides. Then came all the people of Pastolik, (for this was the plan), with their war-spears, and arrows, and some few guns. But first the Russians put out the eyes of Old Kinoos that he might never show the way again, and then they fought, where the waves beat white, with the people of Pastolik."Now the head-man of these Russians was Ivan. 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