What is the solution to this using substitution method pls show ur work

What Is The Solution To This Using Substitution Method Pls Show Ur Work

Answers

Answer 1

Answer:

x=-6, y=0

Step-by-step explanation:

Use the 3x-9y=-18 equation and add 9y to both sides to have 3x on its own on the left side. Then, divide by 3 on both sides. Then you'll have x=-6+3y. Plus this back into the 5x+4y=-30 equation and you'll get 5(-6+3y)+4y=-30. Use the distributive property and you'll get -30+15y+4y=-30. Simplify and get -30+19y=-30, then add 30 to both sides and you'll get 19y=0. Divide by 19 on both sides and you'll get y=0. Now that we know y=0, plug that back into the 5x+4y=-30 equation, and you'll get 5x+4(0)=-30. Simplify and you'll get 5x=-30. Divide by 5 on both sides and you'll get x=-6.


Related Questions

Hi can somebody help me, also explain what a alter interior angle is please

Answers

Answer:

a interior angle is a the angle between adjacent sides of a rectilinear figure.

it is 6

--heart if it helped you!--

Gal Gadot borrows $125,000 at a yearly simple interest rate of 4.5%. How much would she pay, in total, if she paid off the loan in 15 years?

Answers

Answer:

$241,910.31

Step-by-step explanation:

Compound interest

125,000(1.045)^15

Also, Gal Gadot is the best!

6) Determine the dimensions of a rectangle if:

A = x2 – 19x – 90

Answers

Answer:

Step-by-step explanation:

Determine the dimensions of a rectangle if:

A = x2 – 19x – 90

Last week, an information centre had 950 visitors. This week it had 1026 visitors. What is the percentage increase?

Answers

Answer:

8%

Step-by-step explanation:

Find the percent increase by dividing the difference in visitors by the original amount, then multiply it by 100

(76/950) x 100

= 8

So, the percent increase is 8%

BRAINLIEST
a. 18
b. 4.5
c. 3 sqrt of 2
d. sqrt of 14
​​

Answers

Answer:

A

Step-by-step explanation:

basically b = square root x times c

b= x

x= 2

c= 2+7 or the full length

Answer:

Step-by-step explanation:

YALL PLEASEE HELP MEE i am very confused and I need to pass this​

Answers

Answer:

-4 and 1, the answer is C

Step-by-step explanation:

The arrow points at the lines, the trace the lines to the nearest numbers :)

If you see someone who is injured at a workplace, the first thing you should do is _____.
A) call 9-1-1 or your local emergency number
B) begin to administer first aid
C) check the scene for danger
D) try to discover what is wrong with the person
{ The correct answer is C just took the quiz.}

Answers

C. You should never enter an area if it is not safe. If you end up getting hurt, you can’t help anyone else.

Answer:

c

Step-by-step explanation:

What is the equivalent for 4/6

Answers

Answer:

2/3

Step-by-step explanation:

please mark this answer as brainliest

Answer:

[tex] \frac{4}{6} \\ = \frac{2}{3} \\ = 0.66[/tex]

Which table has a constant of proportionality between y and 2 of 0.6?
Choose 1 answer:


Answers

The answer is B. If you divide y by x such as (2.4/4) you get 0.6 and so on.


Find the area of an equilateral triangle with perimeter 18.

Answers

Answer:

15.59 un²

Step-by-step explanation:

18 ÷ 3 = 6

15.59 un²

please help me . if you dont know the answer please do not answer it​

Answers

Answer:

Option D

Step-by-step explanation:

Type of a polynomial is decided by the maximum degree of the variable.

In the given polynomial [tex]-\frac{2}{3}b^3[/tex], maximum power of the polynomial is 3.

Therefore, given polynomial is a cubic polynomial.

Option D is the correct option.

can someone pleease help my teacher will not help me.

Answers

Answer:

The perimeter is 206.

Step-by-step explanation:

When given the area, height and side of the parallelogram, you would use the formula to find the perimeter: P=2a+2*A /h. a = side of the parallelogram, A = area, and h = height. When you plug in everything, you will get 206.

The answer is 206 yes

find the quotient
7 ($49.56

Answers

Answer: 7.08

Reasoning: 49.56 divided by 7 is 7.08

Kirti bookstore sold books worth Rs.285891 in the first week of june and books worth Rs.400768 in the second week of the month .How much was the sale for two weeks together ? In which week was the sale greater and by how much?

Answers

Answer: A)Sale for two weeks =Rs. 686,659.  b)\Kriti books had greater sales in the second week than the first by Rs.114877

Step-by-step explanation:

Price of books sold in the first week=Rs.285891

Price of books sold in the second  week=Rs.400768

Total Amount of books sold in the two weeks=Rs.285891 +Rs.400768 =

Rs. 686,659.

Fro the question, we can see that Kriti books store has more sales in the second week.

Which is greater than in the first week by Rs.114877

Rs.400768 -Rs.285891 =Rs.114,877

HELP HELP ASAP ASAP WILL MARK BRAINLIEST

PLEASE EASY POINTS

Answers

the answer should be 8ft

he line segment is rotated by 270 degrees counterclockwise about the origin to form C′D′. Which statement describes C′D′?
1. C′D′ is 4 units long.
2. C′D′ is 8 units long.
3. C′D′ is parallel to CD.
4. C′D′ is half the length of CD.

Answers

Answer:

it is parrell

Step-by-step explanation:

help! i just need the answers. maybe some explanations would be good too :)

Answers

For Number one: -xy + 2x = 20, x = 5

To solve this, all we need to do is plugin 5 for every place we have x. So...

- (5)y + 2(5) = 20

-5y + 10 = 20

-5y = 10

y = -2

For number two: 4x - 3y - 10 = 1, x = -1

To solve this, we need to plugin -1 for all of the x variables. So...

4 (-1) - 3y - 10 = 1

-4 - 3y - 10 = 1

-14 - 3y = 1

-3y = 15

y = -5

For number three: 5x + 7y = -1, x = 4

We need to plugin -4 for all of the x variables. So...

5 (4) + 7y = -1

20 + 7y = -1

7y = -21

y = -3

For number four: x = 6 + xy, x = -3

Same as the other ones, just plugin -3 for all of the x variables. So...

-3 = 6 + (-3)y

-3 = 6 - 3y

-9 = -3y

3 = y

I hope this helps :)

Trigonometry, NEED HELP ASAP

Answers

Answer:

[tex]sin(\theta_1) = \dfrac{\sqrt{357} }{29}[/tex]

Step-by-step explanation:

The parameters of the angle θ₁ are;

The location of θ₁ = Quadrant II

cos(θ₁) = -22/29

We note the following;

1) The sine of an angle in quadrant II is positive

2) The cosine of an angle in quadrant II is negative,

2) The cos of an angle = The adjacent leg length to the reference angle divided by the hypotenuse length of a right triangle

3) With regards to the right triangle for finding cos(θ₁)

The adjacent leg length = -22 (The x-axis is negative in quadrant II)

The hypotenuse length = 29

The negative sign is obtained from the value of cosine in the quadrant

Therefore, by Pythagoras' theorem, for a right triangle, we have;

The opposite leg length to 'θ₁' = √(29² - 22²) = √(357)

[tex]sin\angle X = \dfrac{Opposite \ leg \ length}{Hypotenuse \ length}[/tex]

Therefore, we have;

[tex]sin(\theta_1) = \dfrac{\sqrt{357} }{29}[/tex].

help me find the perimeter please:)

Answers

Answer:

79.2 cm

Step-by-step explanation:

Add up all the lengths of all of the sides of the figure:

16.2 + 7.5 + 7.5 + 18 + 18 + 12  =  79.2

Answer:

79.2 m

Step-by-step explanation:

Well since all the units are the same and you have already labeled the missing/ congruent sides. Just add up all the sides and you’d end up with 79.2

I don’t know if this is correct !!!!!!!!!! Please answer correctly !!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!

Answers

Answer:

The first one is correct. But why can't they be proven congruent

Step-by-step explanation:

1st ones correct but 2nd one should be they are alike

please help with the question below

Answers

Answer:

I’m not sure but I. Think it’s a I guess

Step-by-step explanation:

(Write the equation) Thank you if you answer it <3

Answers

Answer:

10 - 2 = (x + 6)

Explanation:

The Sum Of x And 6 Is Two Less Than Ten.

The Sum Of x And 6: x + 6

Two Less Than Ten: 10 - 2

Put The Two Terms Together10 - 2 = (x + 6)
answer is: 10-2=(x+6)

All the pizzas at Tony's Pizzeria cost the same per square centimetre
($8.99). How much does a small pizza cost? How much does a large
pizza?
Please give step by step answer

Answers

Click the link above

Need ASAP will give brainliest!

Answers

Answer:

x=4 and y=3

Step-by-step explanation:

Ah Algebra...

2x-3y=-1

y=x-1

Let's solve your system by substitution.

2x−3y=−1; y=x−1

Rewrite equations:

y=x−1;2x−3y=−1

Step: Solve

y= x−1

Step: Substitute x−1 for y in 2x−3y=−1:

2x−3y=−1

2x−3(x−1)=−1

−x+3=−1(Simplify both sides of the equation)

−x+3+−3=−1+−3(Add -3 to both sides)

−x=−4−x−1=−4−1

(Divide both sides by -1)

x=4

Step: Substitute4forxiny=x−1:

y=x−1

y=4−1

y=3(Simplify both sides of the equation)

Answer:

x=4 and y=3

Hope this helps :)

Stay Cold,

Brook

Answer:

(4,3)

Step-by-step explanation:

Being that the y variable is isolated in the second equation, the other side of that equation can be substituted for y in the first equation.

[tex]2x - 3(x - 1) = - 1[/tex]

Now simplify for x.

[tex]2x - 3x + 3 = - 1 \\ - x = - 4 \\ x = 4[/tex]

Now with that, insert the x value in for x in the second equation.

[tex]y = (4) - 1 \\ y = 3[/tex]

Now the correct answer is (4,3)

Someone help and plz make sure it’s right

Answers

Answer:

Step-by-step explanation:

cosx=adjacent /h

Kelly has $100 she received for her birthday She saves $10 each week from doing chores Which function can be used to find t the amount of money Kelly will have saved

Answers

Answer:

$620 every year

Step-by-step explanation:

Since the question didn't specify how long she would have to save for, let's just assume that it's one year. There are 52 weeks in a year which is $520, and on her birthday she would have an extra $100, so every year she saves $620 in total.

what do ducks short necks help them to do? pls help :/

Answers

Answer:

In some circumstances these displays may allow the female to observe the performance of males and to evaluate them as potential mates. To elicit displays from a group of males, a female Mallard may swim with her neck outstretched and her head just above the water

Step-by-step explanation:

hope this helps

this is a trigonometry question
so SIN COSIN AND TANGENT​

Answers

Answer:

x = 6.71

Step-by-step explanation:

use Pythagoras.......

What is the slope of the line RS that contains the points R(-2, -3), S(3, -5)
HELP ASAP

Answers

Answer:

[tex]slope = \dfrac{-2}{5}[/tex]

Step-by-step explanation:

The slope of a line passing through points , [tex] (x_1,y_1) [/tex] and [tex] (x_2,y_2) [/tex] is ,

[tex]\implies slope = \dfrac{y_2-y_1}{x_2-x_1}[/tex]

Using this we have ,

[tex]\implies slope = \dfrac{y_2-y_1}{x_2-x_1}\\\\\implies slope = \dfrac{-5+3}{3+2}\\\\\implies \boxed{\boxed{slope = \dfrac{-2}{5}}}[/tex]

Please please ASAP ASAP please ASAP thank you so
No links or files

Answers

Answer:

c

Step-by-step explanation:

the answer is c (thank you if its right, sorry if its wrong)
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