Solve the system of linear equations by substitution x-y=2 x+2y=5

Answers

Answer 1
Can anyone help me with my questions
Answer 2

Answer:

x = 3

y = 1

Step-by-step explanation:

x - y = 2    ---------------(I)

x + 2y= 5 ----------------(II)

x - y = 2

   x = 2 + y       _________(III)

Substitute x = 2 + y in equation (II)

2 + y + 2y = 5           {combine like terms}

     2 + 3y  = 5

           3y  = 5 -2

            3y = 3

              y = 3/3

y = 1

Substitute y = 1 in equation (III)

x = 2 + 1

x = 3


Related Questions

Kedwin can watch movies at home in two ways. He can order unlimited online movies for $10 a month. He could also go to the local movie rental store and rent 5 movies for $4.00. The system representing this scenario is graphed below.
How many movies does Kedwin need to rent each month to make the online option a better deal?
a. 10 movies per month
b. 10.40 movies per month
c. 12.5 movies per month
d. 13 movies per month

Answers

Answer:

I believe the answer is D.)13 movies per month.

Step-by-step explanation:

Answer:

D. 13 movies per month.

Step-by-step explanation:

Carl's cats weigh a total of 12 kg (kilograms). Bo weighs 5 1/2kg. Tommy weighs 2 1/3 kg. How much does Suzi weigh?

Answers

Answer:

5 1/6 kilograms is the answer I think

Can someone please help me? If it is correct I will give you Brainliest
Thank you

Answers

Answer:

8(2p-3)

Step-by-step explanation:

The 2 equations map to the same line.

What is RU?
A.20
B.30
C.12
D.15

Answers

I think the answer to the question is 20

Answer:

a

Step-by-step explanation:

The segment  RT is a perpendicular bisector and means Δ RSU is isosceles, then the 2 legs are congruent, that is

RS = RU , substitute values

8x = 6x + 5 ( subtract 6x from both sides )

2x = 5 ( divide both sides by 2 )

x = 2.5

Thus

RU = 6x + 5 = 6(2.5) + 5 = 15 + 5 = 20 → a

*
4/3*3.14*2.6*2.6*2.6

Answers

Answer:

73.58

Step-by-step explanation: This is just a guess so I may be wrong. So when I put this into the calculator, it is showing a big number: 73.58485333 so what I did was round it to the nearest hundredths which is 73.58 so hope this helps somebody :)

Answer:
689858/9375 or 73.584853

Step by step explanation:
4/3*3.14*2.6*2.6*2.6 - original equation

4/3*157/50*13/5*13/5*13/5 - convert decimals into fractions

2/3*157/25*13/5*13/5*13/5 - reduce the numbers with the GCF (greatest common factor) 2

689858/9375 - multiply the fractions

write an equation in slope intercept form given slope and point for following (9,-4) slope 2/3 please helpppp

Answers

Answer:

y=2/3x -10

Step-by-step explanation:

y= m x + b

m=slope

slope = 2/3

b= y-intercept

plot point (9,-4) and count down two, left three, until reach y axis.

Find cot 0 if tan 0 = 2

Answers

Answer:

1/2

Step-by-step explanation:

cot0=1/tan0

plug in tan0=2

cot0=1/2

please help me on this! will give you brainliest, ty:,

Answers

Answer: 4^9

Step-by-step explanation:

4^-7 is just 1/4^7 so this is equal to 4^2 divided by 1/4^7. Dividing by a fraction is the same thing as multiplying by its reciprocal (just flip the fraction). So this whole equation is equal to 4^2 multiplied by 4^7. And when you multiply two exponents with the same base, the exponents are just added. So, your answer should be 4^9. Hope this helps! :)

WHATS THE SLOPE BETWEEN THE POINTS (-2,8) AND (4,20)​

Answers

Answer:

m = 12 / 6 = 2 / 1 = 2

Step-by-step explanation:

1.) Plug the points into the formula Y2-Y1/X2-X1. This should come out to be 20-8/4- -2. The 4 minus -2 turns into 4+2 because a double negative turns into a positive.
2.) You’ll then have 12/6. Divide it out and you get 2/1 or 2.

Answer: Slope is 2/1 or 2

12 - x

If x = 7, what is the value of the expression above?

Answers

Answer:

5

Step-by-step explanation:

12-7=5

Answer:

5

Step-by-step explanation:

We know that x is equal to 7. That means we can replace x with this value. This makes our new expression:

12 - 7

12-7 is equal to 5, so this expression will equal 5 when x = 7.

Write the expanded form of the following:
a) 21.061
b) 0.358
c) 506.0201
d)126.00

Answers

Answer:

a) 21.061

20+1+0.0+0.06+0.001

b)0.358

0+0.3+0.05+0.008

c)506.0201

500+0+6+0.0+0.02+0.000+0.0001

d)126.00

100+20+6

Happy New year ✨

WILL GIVE BRAINLLIEST
9 is 10% of what number

Answers

Answer: the answer is 90 bro

Step-by-step explanation:

9 is 10% of 90 i think

Isaac is purchasing two pairs of shoes—one pair for $37.00 and the second pair for $42.00. The state sales tax applied to Isaac’s bill is 7%. How much is Isaac’s total bill? If Isaac uses a coupon entitling him to a 25% discount off the purchase price before tax, how much will his bill be? Assume that a 7% sales tax is applied to the discounted price. Using words, explain how you found the discounted price.

Answers

Answer:
7.11 and 9.48

Step-by-step explanation:

.12 is equal to 7.11
with out coupon

.12 is equal to 9.48
with the coupon

1 2/3 - (-5 2/3) plsssssssssssssss helppppppppppppppppp

Answers

Answer:

[tex]7\frac{1}{3}[/tex]

Step-by-step explanation:

Answer:

i think its 7 1/3 but i may be wrong check that befoer u answer- i did this stuff like 2 years ago

Step-by-step explanation:

tell whether the ordered pair is a solution to the system of inequalities

Answers

Answer:

Yes, it is

Step-by-step explanation:

The solution to the inequality are the sets of points that lie where we have the shaded part

The coordinates (3,0) lie on the shaded part and thus will be a solution to the set of inequalities

Find the solution of

6
(
2
x
+
1
)
=
54
.

Answers

Answer:x-5

Step-by-step explanation:

-6(2x+1)=54

Distribute:

-12x-6=54

Add 6 on both sides:

-12x-6+6=54+6

-12x=60

Divide 12 on both sides:

-12x/-12=60/-12

x=-5

X ≤ 2 x ≥ 2 -4 < x ≤ -2 -4 < , x, ≤ -2 -4 ≤ x ≤ -2 What is the domain of the function?

Answers

Answer:

really hard and strong but am interested

3.41 rounded to the nearest tenth please help

Answers

Your answer would be 3.4

Anything under 5 it stays the same and anything over 5 it goes up one

Answer:

3.4

Step-by-step explanation:

bruh, who else has exams?

Answers

Answer:

I have exams too well cba's

Step-by-step explanation:

Answer:

Girl I have exams I don't like them

Step-by-step explanation:

The measures of the angles of a triangle are shown in the figure below. Solve for x.

Answers

Answer:

x = 25

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Geometry

All angles in a triangle add up to 180°

Step-by-step explanation:

Step 1: Set Up Equation

29° + (4x + 9)° + (x + 17)° = 180°

Step 2: Solve for x

Combine like terms:                    5x + 55 = 180Isolate x term:                              5x = 125Isolate x:                                       x = 25

HELPPPPPPP PLEASE I HAVE TO SUBMIT IN 20 MINS!!!!!!

Answers

4. 81

5. 4-2sqrt(10) and 4+2sqrt(10)

6. (x-8)^2 -62

dam bought 6 deli sandwiches for
$5.75 each. About how much will the
sandwiches cost?

Answers

You actually just need to multiply :)
6 x $5.65 = $33.9

Thomas can process a pile of paperwork in 4 hours less time than Frank. Together they can process the pile in 2.1 hours. How long would it take Frank to do the job alone?

Answers

Answer:

F = 7 hours

Step-by-step explanation:

Let the time taken by Frank to work alone be F.

Translating the word problem into an algebraic equation;

Thomas alone takes (F - 4) hours.

Combine time = 2.1 hours

Their individual work rate expressed in piles per hour are;

Frank = 1/F

Thomas = 1/(F - 4)

Combined rate = 1/F + 1/(F - 4)

Simplifying the equation, we have;

Combined rate = (F - 4 + F)/F(F - 4)

Combined rate = (2F - 4)/F(F - 4)

Combined rate = (2F - 4)/(F²- 4F)

Now to find the time taken when they work together is;

(2F - 4)/(F²- 4F) = 1/2.1

Cross-multiplying, we have;

2.1*(2F - 4) = F² - 4F

4.2F - 8.4 = F² - 4F

Rearranging the equation, we have;

F² - 4.2F - 4F + 8.4 = 0

F² - 8.2F + 8.4 = 0

Solving the quadratic equation by factorization;

Factors = -7 and -1.2

F² - 7F - 1.2F + 8.4 = 0

F(F - 7) - 1.2(F - 7) = 0

(F - 7)(F - 1.2) = 0

Therefore, F = 7 or 1.2 hours

The time taken by Frank alone would be 7 hours.

Plz help my teacher isn’t emailing my back

Answers

Answer:

ugh'

Step-by-step explanation:

12 and  4 i could be wrong sozStep-by-step explanation:

Karen and James both had 30 stocking stuffer items on their shopping list. After black Friday shopping Karen had finished 35% of her shopping After black Friday shopping James had finished 60% of his shopping HOW MANY MORE items has James purchased than Karen?

Answers

Answer: 7.5 items

Step-by-step explanation:

Both Karen and James had 30 stocking items.

Karen bought 35% of her items;

= 35% * 30

= 10.5 items

James has bought 60%;

= 60% * 30

= 18 items

= 18 - 10.5

= 7.5 items

find the next 2 terms in this sequence​

Answers

The answer is 7 and 5
Hope this helps

What's the answer? I need help asap

Answers

The two triangles are congruent through AA (angle-angle proportionality theorem) therefore all the sides are congruent to each other.

In this case:

2y = 5y - 7

2y - 5y = -7

-3y = -7

y = -7/-3

y = 7/3

If this is this then what is what

Answers

Answer:I feel like I should understand this

Step-by-step explanation:

Ummmmmmmmmmmmmmmmymhhhh

helpppp i need the answer fast it’s timed

Answers

The third one is your answer!!!

did anyone know that 11+11 is the same thing as 10+10
because 11+11=22

Answers

:0 my brians hurt

Also That’s cool but did you know lliberty mutual customizes your carinsurance topay for what you need

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