Mathematics High School

Solve the following system of equations using substitution.
3m + 4n = - 12
n = - m - 2
A.m = -4, n = 2 O B.m = 4, n= -6
C. m = -8, n = 6 O D.m = 3, n = 1

Answers

Answer 1
It is A maybe use your calculator

Related Questions

−14.4=−0.6p

I’m bisexual

Answers

That’s coolllllllllllllll

nice :) good for u, wish i could just say that straight up lol

What is the value of x?

Answers

Answer:

x = 30 degrees

Step-by-step explanation:

Okay so we start by noticing that the two pointed out vertices = 180 degrees. So we have the following equation.

(x + 12) + (3x + 48) = 180

If you combine them you get:

4x + 60 = 180

Subtract 60 from both sides..

4x = 120

Divide both sides by 4..

x = 30

And there's your answer!

please HELP MEEEEEE .A store owner wants to make a candy that sells for $1 per pound.he has 50 lb of sugar candies that cost $1.20 per pound.how many pounds of gummy candies that cost 80 cents per pound should he add.

Answers

Answer:

50 pounds

Step-by-step explanation:

we can use the equation           60+80/100x=1(x+50)

we get 80/100 x because the gummy candies are 80 cents or 80/100x

we get 60 from multiplying 1.20$ x 50 = 60

                                                    solve:

                        60+80/100x  =  x+50

                           60 = x-80/100x+50

                             60-50 = 20/100x

                              10 = 20/100x

                               x= 10 x 100/20 = 10x5= 50 pounds

Using proportions, it is found that he should add 50 pounds of gummy candies that cost 80 cents per pound.

What is a proportion?

A proportion is a fraction of a total amount.

This problem is organized as follows:

There is a total of 50 + x pounds.Of those, 50 cost $1.2 per pound.x cost $0.8 per pound.The selling price is of $1.

Hence:

[tex]\frac{50}{50 + x}1.2 + \frac{x}{50+x}0.8 = 1[/tex]

[tex]\frac{60 + 0.8x}{50 + x} = 1[/tex]

[tex]50 + x = 60 + 0.8x[/tex]

[tex]0.2x = 10[/tex]

[tex]x = \frac{10}{0.2}[/tex]

[tex]x = 50[/tex]

He should add 50 pounds of gummy candies that cost 80 cents per pound.

More can be learned about proportions at https://brainly.com/question/24372153

Simplify the following expression. 95 + 5[14 - (3 + 8)] A. 140 B. 190 C. 220 D. 110

Answers

Answer:

The answer is D. 110

Step-by-step explanation:

You add 8 and 3 and get 11 first because in parentheses, and then you subtract that by 14, which will give you 3. Then you multiply 3 times 5 to get 15 and add that to 95 to get your answer. Hope this helps!

Answer:

The answer is D. 110

Step-by-step explanation:

5m+22-15n need answer

Answers

Answer:5m+22-15n

Step-by-step explanation:

It costs $100 to manufacture and ship to a vendor a large batch of souvenir hats, but each hat that is in the shipment brings in revenue of $5 to the manufacturer. Write a function rule for the amount of money the manufacturer earns from the shipment of x hats.

Answers

Answer:

5x - 100

Step-by-step explanation:

Answer:

P(x) = 5x - 100

Step-by-step explanation:

If it snows 3 inches in 6 hours, how many inches will we have after the 36 hours of snowing from this snow storm?

Answers

Answer:

6 inches of snow

Step-by-step explanation:

6x6=36

snows 3 inches in 6 hours

i

Answer:

18

Step-by-step explanation:

3 inches for every 6 hours. There are 6 6-hour groups in 36, so to find the inches in 36 hours, we would multiply the 3 inches times the 6 groups of 6-hour increments (aka 3*6). 3*6 = 18, so after 36 hours of snowing, we'd end up with 18 inches of snow.

Please help me? I’ll give brainliest

Answers

Answer:

left 4 up one because the coordinates are -4 , 1

Answer:

the first one (-4, 1)

Step-by-step explanation:

Solve the equation with a simplified fraction: 1/7 + 3/7 =​

Answers

Answer:

4/7

Step-by-step explanation:

1 +3 = 4

The denominator stays the same..

if you want a better explanation let me know.

In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Joyce has scored 90, 93, and 85 on the first three. What range of scores on the fourth test will give Joyce a C for the semester (an average between 70 and 79, inclusive)? Assume that all test scores have a non-negative value.

Express your answer in interval notation.


HELP ASAP BRAINLEST AND THANKS

Answers

Answer:

[12,48]

Step-by-step explanation:

We will start by calculating the score she needs to get a 70 in the class

We will let x equal the fourth test

[tex]\frac{90+93+85+x}{4} =70[/tex]

This isn't hard to solve and we will do so by multiplying 4 by both sides and subtracting 268 (90+93+85)

This means that x= 12

We will then use the same formula but set it equal to 79

[tex]\frac{90+93+85+x}{4} =79[/tex]

We solve x in the exact same way and get x=48

our final answer is now [12,48]

HALPPPPDNEISIXJVHRSIZJJHRSUXJGHFEHWHSHCVRHHEHSHXCHFUDJ HAHAHAHAHHAHAAHAHAAHHA LOL

Answers

Answer:

&T *OA*&  

Step-by-step explanation:

If three apples cost $6, how much does one apple cost? *

Answers

Answer:

2 dollars

Step-by-step explanation:

If 39 is 10% of an number what is the number? How did you find your answer?

Answers

Answer:

390

Step-by-step explanation:

10% = 39

39 x 10 = 390

390 = 100%

Answer:

x=390

Step-by-step explanation:

x of 10% equal to 39

x10/100 = 39

x10 =3900

x = 3900/10

= 390

The expression is equivalent to which integer? 2(-57 divided by 3) + 20^2 - 5

Answers

Answer:

The answer is 357

Step-by-step explanation:

Given the function, f(x)=10x-3,
what is the value of the function when x=-1/2

Answers

-8

f(-1/2)=10(-1/2)-3
f(-1/2)=(-5)-3
f(-1/2)=-8

What is the measure of

Answers

Answer:

2nd one

<qup=180-45=155(linear pair)

A biology class examined some flowers in a local meadow. The students saw 88 perennial
flowers and 12 annual flowers. What percentage of the flowers were perennials?

Answers

Answer:

88%

Step-by-step explanation:

Oliver saves 10% of his weekly earnings for living expenses. He usually makes $520 each week. This
week he made 10% more. Oliver incorrectly claims that he has $520 left for spending money this
week. Calculate the amount of spending money Oliver has left for this week. What error did Oliver
likely make?
Oliver has $
left for spending money this week.

Answers

Answer: Oliver's living expenses- 520(.1)=$52

Step-by-step explanation:

Can I get help wit my second question

Answers

The answer is 1.8 :)

A shop sells pairs of trainers for £48 each.
They make a percentage profit of 100% on each pair.
What was the cost of each pair of trainers to the shop?

Answers

Answer:

£24

Step-by-step explanation:

100% profit means they sold them for double the price and got back the original price of the product and the original price as profit so -

48 / 2 =£24

I hope this helps :)

-3x^3 (3x^4 - 5x^2-4) *

Answers

Answer: hanhjc,

Step-by-step explanation: bhjaCH

n divide by 1.6=5



Help

Answers

8 maybe? I’m really not sure but I just did 5x1.6

Answer:

3.125

Step-by-step explanation:

You take 5 and divide it by 1.6 to get you answer. I hope this helps

*WILL MARK BRAINLIEST* 15 POINTS
Match each word to its correct definition:

Answers

Answer:

2  

3

1

4

Step-by-step explanation:

Angles that add up to 90 are Complementary angles.

Two angles that have a common vertex and a common side but do not overlap are Adjacent angles.

Angles that are opposite each other and have the same measurment are vertical angles.

Angles that add up to 180 are Supplementary angles.

Hope this helps!! :D

Supplementary angles - angles that add up to 180

Complementary angles- angles add up to 90

Adjacent -two angles that have a common vertex

Vertical- angles that are opposite of each other

Help if you would like brainliest

Answers

1. $2.78

2. If it’s 20% off you save 13.90 so 69.50- 13.90 is $55.60

Find 3 ratios that are equivalent to the given ratio.
12:15

Answers

Answer:

4:5 24:30 36:45

Step-by-step explanation:

what is the value of 2/4

Answers

Answer:

0.5

Step-by-step explanation:

hope this helps

Expand and simplify the following expressions : 1.(a-5)(a-7)
2.(x-2y)(3x+4)
3.(4x+3y)(4x-3y)
4.(6x-7y)(6x+7y)​

Answers

Answer:

1. (a-5)(a-7)

a2 - 12a + 35

2. (x-2y)(3x+4)

3x2 +4x - 6xy - 8y

3. (4x+3y)(4x-3y)

16x2 - 9y2

4. (6x-7y)(6x+7y)

36x2 - 49y2

(the twos after the letters means squared)

:)

Over which interval on the x-axis is there a negative
rate of change in the function?
-2 to -1
O -1.5 to 0.5
O to 1
O 0.5 to 1.5

Answers

4 I’m not that sure though

PLEASE HELP!!! I NEED TO TURN THI IN SOON !!!
Question and instructions in the image below!!!
Will mark brainliest if correct!!!

Answers

Answer:

Im pretty sure its the 3rd one

Step-by-step explanation:

I did this a while ago

If 3x - 7 = 2, then x equals?

Answers

Answer:

rjogir

grggreijgojrejow

g

Step-by-step explanation:

Answer:

3x - 7 = 2

3x = 2 + 7

3x = 9

x =9/3

x = 3

x equals 3

Other Questions
Madison makes 4 types of hair ribbons. She makes 3 of each type of ribbon. Howmany hair ribbons does Madison make?A 12B. 10C. 9D. 7 What is the difference between an embryo and a foetus Please give me the answer. Thanks b2-5cb=15 & c=9 if you can show the work it would be really helpful:) 6. Despite multimillion-dollar investments, many IT organizations cannot respond quickly to evolving business needs. Also, they cannot adapt to large-scale shifts like mergers, sudden drops in sales, or new product introductions. Can cloud computing help organizations improve their responsiveness and get better control of their IT costs Find the area A of polygon JKLMNO with the given vertices.J(-1,2), K (1,2), L (3,3), M (3,1), N (1,0), 0(-1,-3)A-square units Using two to three key vocabulary words, create two sentences. Vocab words: authenticity, power, pity, complex, ashamed, dispossess, dignity. 1. Which of these is NOT found in the nucleus of an atom?neutronsprotonselectronsthe mass of the atom how might showing intolerance toward others impact those looking to you for leadership ? The Aryan caste system wasa. a complex system that divided people by occupation.b. very informal.C. designed to allow people to move easily from one caste to anotherd. arranged with the Vaisyas at the top of the social standings. If y=-4+11 and 3x+y=9 what is the value of y? A laptop has a price $300. The store is giving a 15% discount for the laptop. How much will the laptop cost? Will mark Brainlest !!How did the rulers of the ancient Mesopotamian empire attempt to bring together and control the peoples within their realm? Estimate the time Juanita will arrive at her aunt's home 320 miles away if she leaves at 9:00 a.m., drives about 60 miles per hour, and stopsfor a 40 minute break halfway.A 12:00 p.m.B. 1:00 p.m.c. 2:00 p.m.D. 3:00 p.m.E. 4:00 p.m. How are theme and plot related? What is the name of the tube in front of the esophagus that air travels through to the vocal folds?TracheaThroatLungsDiaphragm Will give 23 points for absolute answer Which word correctly completes the sentence? Para _____________ en aquello que nos proponemos debemos perseverar y luchar.A. obstculoB. metaC. alcanzarD. triunfar Use triangles ABC and A'B'C' for Exercise. Use the coordinates to find the lengths of the sides.please help is due in 20 minutes Hey Everyone I was asking anyone can help with this problem it would really appreciated. Do violent video games make people more likely to be violent in real life and why?(Write an argumentative essay)Please Help!!!