Mathematics Middle School

Solve the system of equations by adding or subtracting

Answers

Answer 1

Answer:x=2 y=-7

Step-by-step explanation:3(2)=6-7=-1

2(2)=4-7=-3

Answer 2

3x + y = -1
-1y -y
2x=-1
2. 2
X=0.5

2x+y=-3
-1y -y
1x=-3
1. 1
X=-3

(0.5,-3)

Related Questions

A regular pentagon with side length s has perimeter 5s. Dakota built a dog pen in her backyard for her dog's new puppies. The pen is shaped like a regular pentagon and has 40-inch sides.
What is the perimeter of the pen?
Write your answer as a whole number or decimal.

Answers

5(40) = 200
perimeter = 200

please helpp!!!You are stuck in a big traffic jam on the freeway and you are wondering how long it will take to get to the next exit, which is miles away. You are timing your progress and find that you can travel of a mile in one hour. If you continue to make progress at this rate, how long will it be until you reach the exit? Solve the problem with a diagram and explain your answer.

Answers

It all depends how many miles the exit is away from you. If it were to be 5 miles then it would take you five hours to reach the exit. For a more accurate answer, it would help to know how many miles it is to reach the exit.

A line goes through the point (–4,–2) and has an x-intercept of –1.

Which point also lies on the line?
(–6,–5)
(3,2)
(4,5)
(5,4)

Answers

Answer:

(5,4)

Step-by-step explanation:

thanks to the second information we know that a certain second point of the line is (-1,0)

Now we can use a formula to find the equation of the line, that is

(y-y1)/(y2-y1) = (x-x1)/(x2-x1) where x and y 1 and 2 are the coordinates of the points.

(y+2)/2 = (x+4)/(-1+4)

y+2/2 = (x+4)/ 3

3y+6 = 2x+8

2x-3y+2 = 0

now we have to find the point that make true the equation (we have to sobstitute x and y with the coordinates of the given points)

1) -12 +15 + 2 = 0 ; 3 = 0 (wrong)

2) 6-4+2 = 0 ; 4 = 0 (wrong)

3) 8-15+2 = 0 ; -5 = 0 (wrong)

4) 10-12+2 = 0 ; 0=0 (true)

so (5,4) is the correct answer

Using the slope formula, what is the slope of the following orders pairs? (6,4) and (15,10)

Answers

Answer:

2/3

Step-by-step explanation:

10-4 = 6. = 6/9= 2/3

____ ___

15-6 9

I WILL GIVE BRAINLIEST FOR ANSWER WITH EXPLANATION!!!! (trolls get banned)

Answers

the answer is C. :)

Hii
It’s C!
If you need an explanation tell me <8
Have a nice day byee

The angles represented by the expressions (2x+46) and (3x-6) are complementary angles. find the measure of the larger angle. Im really confused. Could someone help.

Answers

Answer:

Step-by-step explanation:

complimentary angles add up to 90 so:

3x-6 + 2x +46 = 90

5x +40 = 90

5x = 50

x = 10

2(10)+46 = 66

3(10) - 6 = 24

complementary angles add up to 90 so we want to add the two angles together and set it equal to 90° so 2x+46+3x-6=90
5x+40=90
5x=50
x=10
now that we know what X is we can figure out which angle is bigger and what your answer will be,
2(10)+46=66
3(10)-6=24
and to check our answer 66+24=90 so your answer is 66°

Mary Beth wants to buy grass seed to cover her whole lawn, except for the pool. The pool is 4 5/6 m by 2 1/3 m. Find the area the grass seed needs to cover

Answers

Answer:

If you calculate the area you must multiply both sides.

The answer may be the following:

Exact Form: [tex]\frac{203}{18}[/tex]

Decimal form: 11.27...

Mixed number form: [tex]11\frac{5}{18}[/tex]

PLZ HURRY!!!! 15 POINTS!
Mary is babysitting a 4-year-old. The little boy wants to play in the kiddie pool in the backyard. Mary knows that using the hose that is near the kiddie pool will take 30 minutes to fill up. The little boy has already asked 17 times if the pool is ready but she hasn't even turned on the water yet. Mary also knows that the hose from the front yard works faster and can fill the pool in 1/2 the time as the hose in the back yard. If she can use both hoses at the same time, how long will it take for the pool to fill up?

Answers

I think it’s 7.5 minutes

Answer:

7.5 min

Step-by-step explanation:

Holly and Ethan decide to sell some of their books at a flea market. The booth rental costs $15, and they will sell each book for $1.50.

How many books will Holly and Ethan need to sell to make a profit of exactly $30?

Answers

Answer:

The answer would be 20 books divide 15 \ 1.50 equals 10 then multiply 10 by 2

Step-by-step explanation:

30 + 15 = 45
45 / 1.5 = 30 books

GIVING 60 POINTS TO WHOEVER ANSWERS... AND ALSO GIVING BRAINLIEST HELP FAST

Answers

Answer:

A=72

Step-by-step explanation:

Answer:

Step-by-step explanation:

Hello There!

The polygon shown below is a kite

We can calculate the area of a kite using this formula

[tex]A=\frac{pq}{2}[/tex]

where p and q = the diagonals

The diagonals of the shown kite are 12 ( found by adding 10 and 2) and 12 ( found by adding 6 and 6 )

So having found the diagonals we plug them into formula

[tex]A=\frac{12*12}{2} \\12*12=144\\\frac{144}{2} =72[/tex]

so we can conclude that the area of the polygon is 72

Giving brainliest No links
How much liquid is in the measuring cup?

A) 3 fl. oz
B) 3 1/4 fl. oz
C) 3 1/2 fl. oz
D) 4 fl. oz

Answers

Answer:

Step-by-step explanation:

the cup is filled to more than 3 which eliminates a but isn't completely to 4 which eliminates d. it is halfway which eliminates b so the answer would be c.

What is the measure of ∠CEF?

A. 80 degrees
B. 90 degrees
C. 100 degrees
D. 110 degrees

Answers

Answer:

D. 110

Step-by-step explanation:

30+40=70

180-70=110

Answer:

∠CEF = 110°

Step-by-step explanation:

ΔBED ,

∠BED + ∠BDE + ∠DBE = 180 {Angle sum property}

∠BED + 40 + 30 = 180

∠BED + 70 = 180

∠BED = 180 -70

∠BED = 110°

∠CEF = ∠BED {Vertically opposite angles}

∠CEF = 110°

Kim bought 1.5 pounds of American cheese that cost $4.50 per pound. She also bought 1.75 pounds of Swiss cheese that cost $4.80 per pound.

How much did Kim spend in all?

Answers

The total is: $15.15

ok can someone please help with these two
The price of a DVD is $24.00 plus 8.25% sales tax. What is the sales tax on the DVD in dollars and cents?
(answer choices
$19.80
$0.19
$1.98
$0.20)

Derrick goes to the store and buys a pair of shoes for $79.99, a shirt for $24.99, and a pair of shorts for $34.99. If the sales tax is 8.5%, then about how much did Derrick pay in sales tax?
(answer choices
$111.97
$11.90
$16.42
$1.11)

Answers

dude i have no idea im sorry tbh

Risa is looking at a map. She measures it and sees that on the map her house is 3 inches from her grandma's house. If the map scale is 0.25 inches = 2 miles, how many miles is it from risa's house to her house?

Answers

24 miles, just divide 3 by .25 and multiply the quotient (12) by 2

Answer:

miles 24

Step-by-step explanation:

Divide and multiply

Please help me
Explain your steps please.
Will give brainliest.

Answers

Answer:

Step-by-step explanation:

It's 20.

C^2=A^2+B^2
C is answer

Martin is saving to buy a bike that costs $420. so far he has saved $410. How much must he save each week in order to buy the bike in 16 weeks

Answers

Answer:

0.66 cents every week

Per week he saves 0.66 cents

7th grade math Need help pls <3

Answers

Step-by-step explanation:

all except d equivalent expressions for that are 1 6x+1-3x+1 2 3x+2 3 6x +(-3x) + 1 +1

-4(x-1)=-3x+13-9-x

Pls do it STEP BY STEP!!

Answers

Infinite
That’s
What it
Says

Answer:

-4x-4=-4x+4

-4x+4x=4-4

0=0

Step-by-step explanation:

what is √4

i have to right more i have to right more

Answers

Answer:

Step-by-step explanation:

√4

Answer:

Step-by-step explanation:

The square root of 4 is 2. 2(2)=4. See how they are the same numbers multiplied by each other, like a double. Well, then it is a square root.

Help me please I’ll give brainliest please

Answers

Step-by-step explanation: I believe the answer should be b

I Had that question before at my old school

Answer:

this is a tricky one

Step-by-step explanation:

this is a tricky one but I would think.....

I just need to know the horizontal part I can do the other. Please ASAP

Answers

Answer:

Enjoy and it would be good if you gave more points

Step-by-step explanation:

Find the length of the segment indicated. Round your answer to the nearest tenth if necessary

Answers

Answer:

Step-by-step explanation:

Hi there,

Since we know that 16 and x represents the radius of the circle, it can be determined that they are the same length. Therefore, the length of the segment indicated is 16.

I am quite sure I did this question correctly. Please let me know if I made a mistake.

Cheers.

What is 15 divided by 3 1/3

Answers

Answer:

4 2/3

Step-by-step explanation:

exact form: 9/2 decimal form:4.5 mixed number form:4 1/2

A restaurant manager recorded the drinks ordered by 150 customers. Each customer ordered one drink. The results are shown in the circle graph below.

How many customers ordered juice, tea or water?

Answers

Answer:

82% of people ordered juice, tea, and water

Step-by-step explanation:

Answer:

123 customers

Step-by-step explanation:

12%tea+30%juice+(100-12-30-18=40) 40% water=

82%

82% of 150

150*0.82

123

Eight different names were put into a hat. A name is chosen 121 times and the name Maya is chosen 19 times. What is the experimental probability of the name Maya being chosen? What is the theoretical probability of the name Maya being chosen? Explain how each probability would change if the number of names in the hat was different. The experimental probability of choosing the name Maya is ____

Answers

Step-by-step explanation:

hi im somthing wierd but im kind boy but my name is for girl because this phone is not mine and this account is for my little sster

PLEASE PLEASE HELP AND SHOW WORK:))

Answers

Answer:

The correct answer to this question is A.

Step-by-step explanation:

75.00

-24.65

-----------

50.35

PLEASE HELP!! i am struggling so badly on this concept- please help, be serious and no links or incorrect answers please. if explained i’ll be giving bonus points and thanks to all of your answers and a BRAINLEST!!

Answers

Answer:

32 minutes

Step-by-step explanation:

6 pages= 8min

1 page= 8/6= 4/3 min

24 pages = 4/3× 24= 32

(CORRECT ANSWER GETS BRAINLIEST! 20 POINTS!!!)
What is the quotient of the division below?

2599 divided by 9
288.7
288.ModifyingAbove 7 with bar
288.8
288.ModifyingAbove 8 with bar

Answers

Answer is : D

Step- by -Step:

Gtvtvbtyyvvttv tooooooo

The volume of a pyramid is 47 3. The height of the pyramid is 6 meters. What is the area of
its base?

Answers

473x6= 2,838

the answer should be 2,838?

Answer:

1,419

Step-by-step explanation:

because 473 times 6

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