x + 3y = 1 −3x − 3y = −15 solved by substitution please show work so i can understand

Answers

Answer 1

Answer:

x=7

y= -2

Step-by-step explanation:

x+3y=1 ---------------- (1)

−3x−3y=−15 -------------(2)

Solve Equation (1) for x

x=1−3y

Substitute x=1−3y in equation (2)

−3(1−3y)−3y=−15

−3+9y−3y=−15

−3+6y=−15

6y=−15+3=−12

y=−12/6=−2

y=−2

Substitute y=−2 in equation (1)

x+3(−2)=1

x−6=1

x=1+6=7

x=7


Related Questions

Translate the following sentences into Spanish:
Does Tabitha like drawing or playing the guitar more?

Answers

Answer:

¿A Tabitha le gusta más dibujar o tocar la guitarra?

Step-by-step explanation:

Hoped this helped!

Answer:

¿A Tabitha le gusta más dibujar o tocar la guitarra?r:

Step-by-step explanation:

HELP IM BEING TIMED ANSWER FAST PLEASE

Answers

1,2,6 are the ones to click
the first one from each row is wrong i think

Which of these expressions are equivalent to 4x+2(2x−5)−(3−5x) ? Choose the TWO correct answers.
a- 3x−13

b- 13x−13

c- 8x−5−3−5x

d- 8x−10−3−5x

e- 8x−10−3+5x

Answers

Answer:

4x+2(2x−5)−(3−5x) = 8x-10-3+5x

Step-by-step explanation:

We need to find the equivalent expression to 4x+2(2x−5)−(3−5x).

Using distributive property as follows :

a(b+c) = ab+ac

4x+2(2x−5)−(3−5x) = 4x+4x-10-3+5x

= 8x-10-3+5x

Option (e)

Hence, the correct option is (e) "8x-10-3+5x"

If the measure of ZDEF is 65°, what is the measure of DE?
A. 115°
65
B. 65°
C. 130°
D. 32.5°

Answers

Answer:

I believe it is C because i heard of that one before

The measure of DE is 130 degrees if the measure of DEF is 65 in the circle option (A) is correct.

What is Circle?

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.

Circle is described as a set of points, where each point is at the same distance from a fixed point (called the center of a circle)

We have:

The measure of DEF = 65 degrees

C is the center.

Angle CED = 90 - 65 = 25 degrees

Angle DCE = 180 - 25 - 25

Measure of DE = 130 degrees

Thus, the measure of DE is 130 degrees if the measure of DEF is 65 option (A) is correct.

To learn more on Circles click:

https://brainly.com/question/11833983

#SPJ5

follow my i-n-s-t-a lillbugg_

Answers

The reason I am not going to be following you is because this is a math app

Complete the statement to describe the expression abc + def

Answers

Answer:

What statement?

abc + def = def+ abc??

Step-by-step explanation:

1. A community swimming pool is 7 yards 4.79 feet wide. How wide is the pool in meters and centimeters?

Conversion ratios:

1 m = 1.09 yd
1 yd = 3 ft
1 ft = 0.3048 m
1 m = 100 cm

Answers

Answer:

7.860792 meters and 786.0792 centimeters

Hence, the width of the pool is 7 meters and 86 centimeteres.

What is length?

Length is defined as the measurement or extent of something from end to end. In other words, it is the larger of the two or the highest of three dimensions of geometrical shapes or objects.

How to solve?

we know, 1yd = 3ft

                7yd = 21ft

total length = 21 + 4.79

                   = 25.79ft

we know, 1ft = 0.3048m

                25.79ft = 7.86m

which means 7meters 86 centimeteres

to learn more about length: https://brainly.com/question/18077445

#SPJ2


A bag holds 2 red and 7 blue marbles. What is the probability of the complement of randomly selecting a red marble? Please help asap

Answers

Answer:

I'll help the best I can lol

Step-by-step explanation:

You have a 2 in 9 chance randomly selecting a red marble, so your probability of selecting one in the first place.

2/9 chance is 81.8% impaled probability.

Please answer please I’ll give you brainless. It’s important. Please

Answers

Answer:

I believe it is BCA

Step-by-step explanation

please help i’ll give brainiest

Answers

Answer:

B. 1.41

Step-by-step explanation:

I suggest the Symbolab calculator for math. I absolutely can not do math and it has saved me. It has a bunch of different function. I just did solve for and entered your problem as is.

I just need help starting it off !

Answers

similarities - both linear
differences - opposite slopes, one slope is negative one is positive y-intercepts are different, (maybe x intercepts but it is hard to tell)

please help me. The bill is $12.00 If you decide to leave a 12% tip, how much tip will you leave the hairdresser?

Answers

Answer:

$1.44

Step-by-step explanation:

hcf of 6370 and 5130

Answers

10 is the highest common factor

Answer:

HCF of 6370 and 5130 is 10

Explanation

We find the factors of 6370 and 5130

The factors of 6370 are 1,2,5,7,10, 13,14 ....etc

The factors of 5130 are 1,2,3,5,6,9,10,15.....etc

So the Highest common factor of 6370 and 5130 is 10

Help me with number 2 plz. Its vertex

Answers

Ok I would help you but you have bad music taste

Answer:

x=4, x= -1

Step-by-step explanation:

Write your problem:

[tex]x^{2}[/tex] - 4 = 3x

Subtract 3x from both sides:

[tex]x^{2}[/tex] - 4 - 3x = 3x - 3x

Simplify:

[tex]x^{2}[/tex] - 3x - 4 = 0

Sovle with quadtric formula:

.....

What is the value of x?
SUBMIT WORK FOR THIS QUESTION
(x + 40)
(3x)

Answers

Answer:x=35 because if you add the terms then your equation would be 4x+40=180 because it’s a 180 degree line.

Step-by-step explanation:

On a coordinate plane, a straight dashed line with equation y greater-than 2 x minus 4 has a positive slope and goes through (0, negative 4) and (2, 0). Everything to the left of the line is shaded. Which of the points are solutions to the inequality? Check all that apply. (–2, –5) (0, –4) (1, 1) (3, 5) (5, 5)

Answers

The answer to your question would be A,C,D

Hope I helped ~~Laurel

helpppppppppppp meeeeeeeeee

Answers

30 percent off sales tax

9 out of 12 is 75%, and 75 plus 25 is 100, so maybe the decrease is 25 percent?

Which mixed number is equivalent to the improper fraction below?

Answers

D is the correct fraction

the weight of one serving of trail mix is 2.5 ounces. How many servings are there in 18.5 ounces of trial mix.

Answers

Answer:

7.4 servings

Step-by-step explanation:

What we know:

- 1 serving = 2.5 ounces

To find the number of servings there are in 18.5 ounces, divide 18.5 by 2.5.

18.5/2.5=7.4

I hope this helps!

Order from least to greatest.
68%, 0.687, 20

Answers

Answer:

20, 68%, 0.687

Step-by-step explanation:

If 20 were to be a percentage, then it'll be less than 68% and 0.687. Since the 7 in 0.687 is greater than 5, you would round up when the question says so. 0.687 is greater than 68%; if you move the decimal 2 times to the right, then 0.687 would be 68.7%. Therefore the order from least to greatest is 20, 68%, 0.687.

HELPPPPPPPPppppp PLEASE

Answers

Answer: 2

Step-by-step explanation:

definitely not agree. lets say n = 2, 3n+1 would equal to 7 while the original equation would be 8.

I need help with this equation.

Answers

6 is your answer
If you make common denominator would make it 2/8+( )/8=1
8-2= 6 to fill that numerator to make 1
if you multiply the numerator and denominator of 1/4 by 2 it equals 2/8

8/8 = 1

2/8 + ?/8 = 8/8

2 + ? = 8
2 + 6 = 8

the answer is 6
hope this helps!

15y +5x- 7y+1x-3y i need help

Answers

Answer:

simplify the expression: 6x+5y

Step-by-step explanation:

What is the measure of

Answers

Answer:

gvb

Step-by-step explanation:

your question is wrong

ask right question first

the width of a rectangle is half of the length of the rectangle. if the perimeter is 84 inches what is the length of the rectangle?

Answers

Answer:

The length of the rectangle is 28 inches.

Step-by-step explanation:

We have that the width (W) of a rectangle is half of the length (L) of the rectangle:

[tex] W = \frac{1}{2}L [/tex]  (1)

Also, the perimeter is 84 inches:

[tex] P = 2W + 2L = 84 in [/tex]   (2)

By entering equation (1) into equation (2) we have:

[tex]2(\frac{1}{2}L) + 2L = 84 in[/tex]

[tex] L = \frac{84}{3} = 28 in [/tex]

Therefore, the length of the rectangle is 28 inches.

I hope it helps you!  

what is 9x0 helppppppp

Answers

It’s 0 jebejjd dnjfndjdk

......the correct answer is 0

Pls help me!!!!

1760 yd= mi

Answers

Answer:

1

Step-by-step explanation:

there are 1760 yards in a mile

1760 yards is equal to 1 mile

What is the solution to this equation?
X = 8
-4
O A. x= 32
O B. x= -32
O C. x= -2
O D. x= 2

Answers

Answer:

○B. x= -32

Step-by-step explanation:

The problem is not very organized so I am not sure if we are adding, multiplying, etc. I believe that is the answer though.

The correct answer would be B. x=-2

The heights, in feet, of the trees for sale at two nurseries are shown below.
Yard Works: 7, 9, 7, 12,5
The Grow Station: 9, 11, 6, 12, 7
which statement are true regarding the measurements of center in variability of these data sets/3 choices

Answers

Answer:

The mean of tree heights at Yard Works is 8 feet. The mean of tree heights at The Grow Station is 9 feet. The mean absolute deviations of the tree heights at both yards is 2.

Answer:

The heights, in feet, of the trees for sale at two nurseries are shown below.

Yard Works: 7, 9, 7, 12, 5

The Grow Station: 9, 11, 6, 12, 7

Which statements are true regarding the measures of center and variability of these data sets? Select three choices.

________________________________________________________

1  The mean of the tree heights at Yard Works is less than the mean of the tree heights at The Grow Station.

2  The median of the tree heights at Yard Works is greater than the median of the tree heights at The Grow Station.

3  The range of the tree heights at Yard Works is greater than the range of the tree heights at The Grow Station.

4  The mean absolute deviation of the tree heights at Yard Works is greater than the mean absolute deviation of the tree heights at The Grow Station.

5  The mean absolute deviation of the tree heights at Yard Works is equal to the mean absolute deviation of the tree heights at The Grow Station.

Step-by-step explanation:

Yard works has...

mean=8

median=7

mode=7

range=11

because in order it is 5 7 7 9 12

(5+7+7+9+12)/5=8

5 7( 7 )9 12 is the median

and seven occurs the most

and with this logic...

THE GROWSTATION has a

mean=9

median=9

mode=n/a

range=6

_______________________________________

    YEA) The mean of the tree heights at Yard Works is less than the mean of the tree heights at The Grow Station.

YEA) The median of the tree heights at Yard Works is greater than the median of the tree heights at The Grow Station.

  YEA) The range of the tree heights at Yard Works is greater than the range of the tree heights at The Grow Station.

The mean absolute deviation of the tree heights at Yard Works is greater than the mean absolute deviation of the tree heights at The Grow Station.

The mean absolute deviation of the tree heights at Yard Works is equal to the mean absolute deviation of the tree heights at The Grow Station.

_________________________________________________________

A      B      C

Solve the following proportion for X.
3/17=x/5 Round your answer to the nearest tenth.​

Answers

Answer:

ans: x = 0.035

Step-by-step explanation:

3/17 = x/5

x = 3÷ (17×5)

x = 3÷ 85

x = 0.035

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