Mathematics High School

Given the following system of equations: 2x + 3y = 12
2x - 2y = 2

What is the value of x + y? ​

Answers

Answer 1

Answer:

5

Step-by-step explanation:

2x + 3y = 12

2x - 2y = 2 // subtract second equation from first

5y = 10

y = 2

x = (2 + 2y) / 2 = y + 1 = 3

x + y = 5

Related Questions

The probability that a student guesses the correct answer to a five​-choice multiple choice question is ​P(correct)=0.2. How many correct answers should a student expect to guess on a test with 60 ​five-choice multiple choice​ questions?

Answers

Answer:

12 correct answers

Step-by-step explanation:

It is given that :

The probability of a student guessing the correct answer for a five choice multiple choice question is [tex]$\text{P(correct)}=0.2$[/tex]

Number of multiple choice questions = 60

So the number of correct answers that a student are expected to guess correctly on the test is :

[tex]$=60 \times 0.2$[/tex]

= 12

A cell phone company charges a one-time activation fee, as well as a monthly service charge for a cell phone plan with unlimited minutes and data. The total cost is modeled by the function C(x) = 99 + 85x. Which statement represents the meaning of the function?

Answers

Answer:

C(x) is the total cost, x is the number of months of service, $99 is the one-time activation fee, and $85 is the service charge per month.

Step-by-step explanation:

Because I'm always right.

Hiiioo :D can someone please help. I really need help. Much love ❤️❤️❤️

Answers

Answer:

The answer is the second one!

Have a wonderful day/night! <3

Find area of square
Pls help

Answers

Answer:

49/64 yd²

Step-by-step explanation:

since where finding a square we do

A = bxh

A = 7/8×7/8

A = 49/64

For a school fundraiser, Percy bought a big box of rubber ducks and wrote prize amounts, in dollars, on the bottom of each rubber duck. The prize amounts were $5, $10, $20, $50, and $100. The number of ducks with each prize amount varied so that the total value for all the ducks with each prize amount was always $500.

Percy then put all the rubber ducks in his school’s swimming pool. At the fundraiser, participants used a long net to catch a duck from the pool. They won the amount written on the bottom of the rubber duck, and then they threw the duck back into the pool before the next person’s turn. Since the ducks were returned to the pool after they were caught, the chances of winning any particular amount remained the same.

Amir paid $15 to play the game once. If we assume he randomly selected a du

Answers

Answer:

i dont know

Step-by-step explanation:

What is the concept of cause and effect?
A.
when an action causes something to come into effect
B.
when an action is caused but there is no resulting effect
C.
when an action doesn't actually have a resulting effect
D.
when an action leads to an effect that is not desired

Answers

Answer:

A.  when an action causes something to come into effect

Step-by-step explanation:

Mark as brainliest please. Hope the answer helps :)

Help I'll give Brainly

Answers

Answer:i think D

Step-by-step explanation:

In this figure, triangle GHJ is similar to triangle POR.
Based on this information, which ratio represents tan H?

Answers

Answer:8/15

Step-by-step explanation:

Tanθ in a right angle triangle is the ratio of its perpendicular to its base. The ratio that represents the Tan(∠H) is [tex]\dfrac{8}{15}[/tex].

What is Tangent (Tanθ)?

The tangent or tanθ in a right angle triangle is the ratio of its perpendicular to its base. it is given as,

[tex]\rm{Tangent(\theta) = \dfrac{Perpendicular}{Base}[/tex]

where,

θ is the angle,

Perpendicular is the side of the triangle opposite to the angle θ,

Base is the adjacent smaller side of the angle θ.

As it is given that the two of the given triangles are similar triangles, therefore, their corresponding sides will be in the same ratio.

[tex]\dfrac{QR}{HJ} = \dfrac{RP}{JG} = \dfrac{PQ}{GH}[/tex]

Further, the sides can be written as,

[tex]\dfrac{QR}{HJ} = \dfrac{RP}{JG}\\\\\dfrac{QR}{RP} = \dfrac{HJ}{JG}=\dfrac{15}{8}[/tex]

Now, the Tan(∠H) can be written as,

[tex]\rm{Tangent(\theta) = \dfrac{Perpendicular}{Base}[/tex]

Substituting the value for the ∠H in ΔHJG,

[tex]\rm Tangent(\angle H) = \dfrac{JG}{HJ}[/tex]

As the ratio is already known, therefore,

[tex]\rm Tangent(\angle H) = \dfrac{8}{15} = 0.5\bar3[/tex]

Hence, the ratio that represents the Tan(∠H) is [tex]\dfrac{8}{15}[/tex].

Learn more about Tangent (Tanθ):

https://brainly.com/question/10623976

HELP HELP ASAP ASAP WILL MARK BRAINLIEST
ANSWER BOTH PLEASE EASY POINTS

Answers

Answer:

1.) Hypotenuse.

The hypotenuse is the longer side.

2.)Leg

Answer:

1.) Hypotenuse

2.) Leg

Step-by-step explanation:

The legs or bases of a triangle are the sides connected to the right angle.

The hypotenuse is the side across from the right angle and is always the longest side.

The mean numberr of stereos sold per day at the store was 15 over a period of 7 days which statement must be true about the stereo sales at the store

Answers

Answer:

well I don't know the options, but I do know that 105 would have been sold in a week.

Step-by-step explanation:

15 x 7 = 105

Find a. Round to the nearest tenth:

Answers

Answer:

14.356

Step-by-step explanation:

that's the answer round up to 14.4

1) Find AC
2
А
24
118°
220
B

Answers

Ac is 40 because you add up the number and subtract by 180 which is 40 after all or that

Please answer this!!! No links !!!

Answers

My work for your question

Plzzzzzz heeelllpp. 20 pointsss

Answers

Answer:

Hello.

The answer to this question is  

− √ 2 − √ 3 /2

And in Decimal Form: − 0.25881904

Step-by-step explanation:

Give brainliest :)

If kobe had 30 girls and Shaq had 20 girls... How many more girls does Kobe have than Shaq?

Answers

Answer:

10 more shawties

Step-by-step explanation:

30-20 = 10

Please help me no links im timed 1 question HELP ME!!!

Answers

Answer:

c. add 5 to each side

Step-by-step explanation:

Answer:

c. add 5 to each side

Step-by-step explanation:

that's the fastest way to get y=20

Anybody help me please

Answers

Answer:

Rotation 180° counterclockwise about the origin

Answer:

The second one, I think.

Find the volume of this regular hexagonal pyramid

Answers

Answer:

83 is the volume according to my best knowledge and remembrance of Geometry. I hope these calculations help!

Step-by-step explanation:

Since a right triangle is established upon the indication of the right angle marking, and the 50 degree marking is apparent around the one of the legs, the resulting angle of the right triangle unidentified is 40 degrees. Now, the formula is 1/3 × (the area of the base) × (the height), where finding the base area dictates that we apply Area = (3√3 s^2)/ 2, where s = side length, (3√3 (4)^2)/ 2 = 24√3, Substitution Property of Equality: 1/3 * 24√3 * x; find x, "the radius of a hexagon is equal to the length of one side" (mathblog), use the cosine ratio because cosine = adjacent over hypotenuse, cos(50) = 4 (according to the length of side equal radius of hexagon)/x = 6, 1/3 * 24√3 * 6 = 48√3 = 83 is the volume.

how would you do log(3250) without a calculator

Answers

Answer:

Step-by-step explanation:

It depends on what level you are. Logs are most easily developed by using a series for the natural logarithms (instead of base 10, you use base e). Even that is a difficult process using a series that you won't be introduced to until your second calculus course..

For now, I'd be content to use a calculator. The series does not converge terribly quickly.

Please help me on this! Name it like A, B, C, D

Answers

Answer:

B. -2_x_4÷3 this answer are not sure

Answer:

D

Step-by-step explanation:

-5 < 6x +3

-8 < 6x

-(4/3) < x

I use < to represent 'no no smaller than'

What’s the answer ? Pleaseee help

Answers

Answer:blue

Step-by-step explanation:

the dark one

724 Ft

Surface Area = 2×(17×4 + 17×14 + 4×14) = 724 feet^2

Laurie needs at least 40 pounds of topsoil for a new flower bed. Each bag of topsoil is 200 ounces. Laurie determines that if she buys 3 bags of topsoil she will have enough for the flower bed. Is Laurie correct? Why or why not?

Answers

Answer:

No she will not have enough topsoil for the flower bed.And she is not correct.Because every pound is 16 ounces.so 600 ounces is only 37.5 pounds

Step-by-step explanation:

3×200=600600÷16=37.5

Hope this helps :)

When Daniel left his house in the morning, his cell phone battery was partially
charged. Let B represent the charge remaining in Daniel's battery, as a percentage,
hours since Daniel left his house. The table below has select values showing the linear
relationship between t and B. Determine how much battery life Daniel's phone
would have 1.5 hours after leaving his house.
t
B
1
27.5
2.5
19.25
4
11

Answers

Answer:

24.75 percents

Step-by-step explanation:

Jackson bought a jar of 240 marbles. The percent bar graph shows the percentage of each color marble in the jar.





How many of the marbles are blue?

Answers

Answer:

84

Step-by-step explanation:

Blue marbles = 35%

35% = 0.35

240(0.35)

84

Answer:

84

Step-by-step explanation:

0.35×240=84

hope this helps

Randy is checking to determine if the expressions 2 x + 2 + 4 x and 2 (3 x + 1) are equivalent. When x = 3, he correctly finds that both expressions have a value of 20. When x = 2, he correctly evaluates the first expression to find that 2 x + 2 + 4 x = 14.

What is the value of the second expression when x = 2, and are the two expressions equivalent?

Answers

Answer:

14

equivalent

Step-by-step explanation:

x=2

2(3(2)+1)=

2(6+1)=

2(7)=

14

equivalent

Answer : 14 the answer is 14

Plz need help i cant do it​

Answers

Answer

adding 2

Step-by-step explanation:

Median is 8

I don't know if this is correct but I tried.

PLEASE HELP WHAT ONE
Its not C

Answers

Answer:

D. (-3, 4)

Step-by-step explanation:

Can someone help me with this. Will Mark brainliest.

Answers

Answer: I think it’s False I’m not sure

Answer:

it's false because isosceles is convex quadrilateral with line of symmetry

Leah products that she will need to contribute $7,000 each year for her College tuition she already has $4,000 in savings and the table shows the total value she will have in her account at the end of four years depending on how much he deposits if Leah wants enough after 4 years to cover her contribution for the first two years of college what is the minimum amount she should deposit each month

​

Answers

she should deposit 200$ each month

Hope this helps :)

Step-by-step explanation:

7,000×4=28,000

28,000÷2=14,000

can you please help me? as much as you can is greatly appreciated <333 pt 2

Answers

Answer: m3 for the first one

Step-by-step explanation:de

This could take a while, so I'll simply put the answer with the theorem I used to figure it out with.

1) 45° - minor arc; Central Angles/Arcs Theorem

2) 180° - semi circle; Diameter Theorem? (Whichever theorem states that the diameter separates a circle into two 180° semi circles)

3) 75° - minor arc; Angle Addition Postulate

4) 105° - minor arc; Angle Addition Postulate

5) 225° - major arc; Angle Addition Postulate

6) 45° - minor arc; Vertical Angles Theorem

7) 135° - minor arc; Angle Addition Postulate

8) 240° - major arc; Angle Addition Postulate

9) 315° - major arc; Angle Subtraction Postulate, i think? lol.

10) 180° - semi circle; Diameter Theorem or whatever it's called lol.

Additionally, I determined whether or not an angle was a major arc, minor arc, or semi circle with the knowledge that:

minor arc - less than 180 degreesmajor arc - more than 180 degreessemi circle - is 180 degrees.

Have a nice day, fam. Spread The Love. lol I'm tired after typing all this out :P

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