solve the system of equations:
-3x + 7y = -15
3x + 5y = 15

what do X and Y equal?

Answers

Answer 1

Answer:

x=5

y=0

Step-by-step explanation:

Let's solve the system of equations through elimination

Solving by elimination is when you add or subtract one equation by the other to eliminate one variable

In this case, adding 3x and -3x would cancel each other out so we should add the equations

[tex]-3x + 7y = -15\\+(3x + 5y = 15)\\0+12y=0\\12y=0[/tex]

Now solve for y

Divide both sides by 12 to isolate y

[tex]12y=0\\\\\frac{12y}{12} =\frac{0}{12} \\\\y=0[/tex]

Now sub in the value of y into one of the original equations and solve for x

[tex]3x+5y=15\\3x+5(0)=15\\3x=15\\[/tex]

Divide both sides by 3 to isolate x

[tex]\frac{3x}{3} =\frac{15}{3} \\x=5[/tex]


Related Questions

The number of peanuts in bags is normally distributed with a mean of 172.5 peanuts and a standard deviation of 1.9 peanuts.

What is the z-score of a bag containing 168 peanuts?

−2.37

−2.06

−1.32

−1.05

Answers

-2.368 tell me if I’m wrong

Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 34 liters per minute. There are 400
liters in the pond to start.
Let W represent the total amount of water in the pond (in liters), and let T represent the total number of minutes that water has been
added. Write an equation relating W to T. Then use this equation to find the total amount of water after 16 minutes.
Equation:
D=0
X
Total amount of water after 16 minutes: liters
5
?

Answers

Multiply liters per minute by number of minutes and add that to the starting amount.


W = 34t + 400


now replace t with 16 and solve:

W = 34(16) = 400

W = 544 + 400

W = 944

After 16 minutes there are 944 liters in the pond

What is the surface area of the cylinder with height 8 ft and radius 3 ft? Round your
answer to the nearest thousandth.


A: 186.885

B: 195.004

C: 205.132

D: 207.345

Answers

Given↷Height of the cylinder ⇢8ftRadius of the cylinder ⇢3ftTo find↷Surface Area of the cylinderAnswer↷207.345Solution ↷

We know that,

The surface of a cylinder is given by,

2πr(r + h)h= heightr= radius

so,

the surface area of the given cylinder would be,

⇢2π*3(3+8)⇢6π*11⇢66π⇢207.345

[tex]\bold{ANSWER:}[/tex]
OPTION D

[tex]\bold{EXPLANATIONS:}[/tex]

What is 35 - 2 ????? I am very confused and need help. I’m in college pls.

Answers

Answer:

33

Step-by-step explanation:

35 take away 1 is 34 take away one more its 33

The answer to your question is 33. If you have 35 oranges and eat 2 you end up with 33.

What’s the circumference of circles

Answers

[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]

Let's find the circumference of given circle ~

Circumference :

[tex]\qquad \tt\dashrightarrow \:c =2 \pi r[/tex]

where,

r = radius = 3 yd

now, let's calculate circumference ~

[tex]\qquad \tt  \dashrightarrow \:c = 2 \times \pi \times 3[/tex]

[tex]\qquad \tt  \dashrightarrow \:c = 6 \pi \: \: yd[/tex]

Now, let's plug in approximate value of pi :

[tex]\qquad \tt  \dashrightarrow \:c = 6 \times 3.14 \: \: [/tex]

[tex]\qquad \tt \dashrightarrow \:c = 18.84 \: \: yd[/tex]

Help please i need this fast

Answers

Answer:

Mean=5, 77 Median=6 Mode=6 I hope this will help you

The area of an isosoles trapezoid is 45cm squared, and it's height is 5cm. Find the perimeter if the length of a leg is 2/3 of the sum of the bases.

Answers

Answer:

Perimeter = 42 cm.

Step-by-step explanation:

The  2 legs are equal in length as it is an isosceles trapezoid.

Area of  trapezoid  = (h/2)(a + b)  where a and b are the parallel bases.

So

(5/2) (a + b) = 45

a + b = 45 * 2/5 = 18 cm.

We are given that the length of a leg (L) is 2/3 * sum of the bases, so:

L = 2/3(a + b)

  = 2/3 * 18

   = 12 cm.

The perimeter = a + b + 2L

= 18 * 2*12

= 42 cm.

Please help me with these 2 questions, I don’t really need explanations I just need straight forward answers ! The questions are linked below. 50 points

Answers

Answer:

1. The value of 5 is fifty thousand

2. The value of 6 is six thousand

Step-by-step explanation:

1. 8.156 million - 8,156,000

2. 6,521

^ 6000

I NEED HELPPOO will mark you BRAINLIEST The diameter of a circle is 14, and its center is located at (3,-4).
What is the equation of the circle?
Choose from the drop-down menus to complete the equation
(* Choose.. Choose v)2 + (y Choose Choose.
x
.
= Choose .
6
7
8

Answers

Step-by-step explanation:

which of the following are solutions​

Answers

Answer:

-5 and 9

Step-by-step explanation:

To find the solutions we will factor the equation.

First we take out a 2:

[tex]2(x^2-4x-45)[/tex]

Then we can factor again:

[tex]2(x+5)(x-9)[/tex]

This provides us with the answer of:

[tex]x+5=0[/tex]

and

[tex]x-9=0[/tex]

Hence the solutions of -5 and 9.

The formula for a ciprofloxacin otic drop
quantity of each ingredient required to is given in the literature as follows10:
make 1500 g of the powder. Ciprofloxacin 1 g
Calcium Carbonate Propylene Glycol 5 parts 50 mL
Magnesium Oxide Glycerin qs ad 1 part 100 mL
Sodium Bicarbonate 4 parts How many grams of ciprofloxacin Bismuth Subcarbonate 3 parts would be required to prepare 200 15-mL

Answers

Answer:

I dont know bro, I am here for the free answers.

Paul invests £500 at a rate of 1.5% per year compound interest.

Find the value of the investment after 3 years.
Give your answer correct to the nearest penny.

Answers

Tthe value of Paul's investment after 3 years would be equal to 52,285 penny.

How to calculate compound interest?

Mathematically, compound interest is calculated by using this formula:

[tex]A=P(1+r )^{t}[/tex]

Where:

A is the future value.P is the principal.R is the interest rate.T is the time measured in years.

Given the following data:

Principal = £500.

Time = 3 years

Interest rate = 1.5% = 0.015.

Substituting the given parameters into the formula, we have;

A = 500(1 + 0.015)³

A = 500(1.015)³

A = 500 × 1.0457

A = £522.85.

Conversion:

100 penny = 1 pounds.

X penny = 522.85 pounds.

Cross-multiplying, we have:

X = 522.85 × 100

X = 52,285 penny.

Read more on interest here: brainly.com/question/24341207

Find the area of right angled triangle at J, if ZJ = 14 and JW = 1.

Answers

Answer:

7 sq units

Step-by-step explanation:

Area of right angled triangle

= 1/2 * ZJ * JW

= 1/2 * 14 * 1

= 7 sq units

Is 10 times as much as 0.007

Answers

Answer:

10 x 0.007 = 0.07

Step-by-step explanation:

im not sure if thats what you meant

Angeline puts $2000 into savings account which receives 2.6% interest per year. How much interest will she have on her savings at the end of year??

Thank you so much!

Answers

Answer:

A nightlight uses 4.00 W of power when plugged into an outlet. Assume that the only resistance in the circuit is provided by the light bulb's filament. The current in the circuit is 3.40 X 10^-2 A. What is the voltage across the filament?

Step-by-step explanation:

[tex]\pink{ \rule{0pt}{99999pt}}[/tex]

In a study of the performance of a new engine design, the weight of 22 aircrafts (in tons) and the top speed (in mph) were recorded. A regression line was generated and shown to be an appropriate description of the relationship. The results of the regression analysis are below.

Part A: What is the LSRL based on the analysis provided? Make sure to identify what the variables represent in the context of the problem. (4 points)

Part B: What is the predicted value for the top speed of an aircraft if its weight is 100 tons? Show your work. (6 points)

Answers

The LSRL is the Least Squares Regression Line of the new engine design performance

The LSRL is: y = 11.6559 + 3.47812x The predicted top speed when the weight is 100 tons is 359.4679

How to determine the LSRL?

This is the equation of the Least Squares Regression Line.

From the calculation summary, we have the following parameters:

Coefficient of constant = 11.6559Coefficient of Weight = 3.47812

So, the LSRL is:

y = 11.6559 + 3.47812x

Where y represents the predicted volume and x represents the weight.

The predicted value when the weight is 100 tons

In (a), we have:

y = 11.6559 + 3.47812x

Substitute 100 for x

y = 11.6559 + 3.47812 * 100

Evaluate

y = 359.4679

Hence, the predicted top speed when the weight is 100 tons is 359.4679

Read more about Least Squares Regression Line at:

https://brainly.com/question/24848242

Evaluate [tex]\frac{1}{2^{-2}x^{-3}y^{5} }[/tex] for x=2 and y=-4.

A)-16
b)-4
c)[tex]-\frac{1}{32}[/tex]
d)16

Answers

Answer:

[tex]\bf C)\: -\cfrac{1}{32}[/tex]

Step-by-step explanation:

[tex]\tt \cfrac{1}{2^{-2}x^{-3}y^5}[/tex]

[tex]\tt x=2\\y=-4[/tex]

~

Substitute ''x'' with '2' & 'y' with "-4":-

[tex]\tt \cfrac{1}{2^{-2}\times \:2^{-3}\left(-4\right)^5}[/tex]

First let's solve [tex]\tt 2^{-2}\times \:\:2^{-3}\left(-4\right)^5[/tex]

[tex]\tt 2^{-2}\times \:2^{-3}=\boxed{\cfrac{1}{32} }[/tex]

[tex]\tt \cfrac{1}{32}\left(-4\right)^5[/tex]

Calculate exponents:- -4^5= -1024

[tex]\tt \cfrac{1}{32}\left(-1024\right)[/tex]

Remove parentheses, apply rule:- [tex]\tt a\left(-b\right)=-ab[/tex]

[tex]\tt-\frac{1}{32}\times \:1024[/tex]

[tex]\tt \cfrac{1}{32}\times \cfrac{1024}{1}[/tex]

Apply fraction rule:-

[tex]\tt -\cfrac{1\times \:1024}{32\times \:1}[/tex]

[tex]\tt \cfrac{1024}{32}[/tex]

Divide numbers:-

[tex]\tt -32[/tex]

Now that we're done factoring the denominator let's bring down the numerator which is ' 1 ':-

[tex]\tt -\cfrac{1}{32}\;\; \bf Answer[/tex]

☆-------☆-------☆-------☆

[tex]\dfrac 1{2^{-2}\cdot x^{-3}\cdot y^5}\\\\=\dfrac 1{2^{-2} \cdot2^{-3} \cdot (-4)^5}\\\\=-\dfrac 1{2^{-2} \cdot 2^{-3} \cdot (2^2)^5}\\\\=-\dfrac{1}{2^{-2} \cdot 2^{-3} \cdot 2^{10}}\\\\=-\dfrac{1}{2^{-2-3+10}}\\\\=-\dfrac 1{2^{5}}\\\\=-\dfrac 1{32}[/tex]

NEED AN ANSWER NOW! WILL GIVE YOU BRAINLIEST!!

I can't figure out what's the answer, I'm clueless.

Answers

Answer:

10

Step-by-step explanation:

On the chart, it says "Number of hostel rooms: 10". The rest of the data is useless and is just there to confuse you.

The answer is 25

Just add them all together

3+5+8+6+2+1

What is an externality

Answers

Answer:

Externalities refer to situations when the effect of production or consumption of goods and services imposes costs or benefits on others that are not reflected in the prices charged for the goods and services being provided.

the picture below is an example of what it looks like

WHAT EXTERNALITY IS : externality is a economic cost or sometimes a benefit that is the´´by product´´ of the economic activity. the activity that is allacated outside of the system. the resources are likely to be misallocated when there is a externality.

the fact of existing outside the perceiving subject.

Solve for x in the diagram below.

Answers

Answer:

x=20

Step-by-step explanation:

hope it will help you

Answer:

Step-by-step explanation:

x+ 2x + x +10 = 90

Combine like terms

          4x + 10 = 90

To isolate 'x', first subtract 10 from both sides

                 4x = 90 - 10

                 4x = 80

Now, divide both sides by 4 to get the value of 'x'

                    x = 80/4

                    x = 20

which is greater 1.59 or 1.6

Answers

Answer:

1.6 is greater than 1.59

Step-by-step explanation:

It goes. 1.5 -> 1.51 -> 1.52.... -> 1.58 -> 1.59 -> 1.6 -> 1.61...

1.59*100=159
1.60*100=160
So 1.6 is greater

Monica buys a postage stamp the area of the stamp is more likely to be 1 square inch or 1 square meter? Explain

Answers

Answer:

HEyy

Step-by-step explanation:

its one square inch because if you think about it a little postage samp is very tiny


pls help ill give brainliest

Answers

Answer:

y = -3x + 2

Step-by-step explanation:

use the slope formula to find the slope

replace x and y into slope intercept form with the slope you just found

Can you do number 1 for me

Answers

Answer:

c. 3/5

Step-by-step explanation:

Which of the following is a polynomial function in standard form with zeros at 0, 2, and 4? f(x) = x(x + 2)(x + 4) f(x) = x(x – 2)(x – 4) f(x) = x3 – 6x2 + 8x f(x) = x3 + 6x2 + 8x

Answers

Answer:

f(x) = x^3 - 6x^2+8x

Step-by-step explanation:

Remember while you are studying polynomial functions that zeros are just the solutions (and are the x-intercepts on the graph).

The question said the zeros were 0, 2 and 4, so if you were solving the equation you would get:

x=0 and x=2 and x=4

Just "undo" that last step of solving and you get:

x = 0 and

x - 4 = 0 and

x - 2 = 0

These are the factors of the function and they do look just like the second option of answers on your question. But that is in factored form and they asked you for standard form.

so f(x)=x(x-2)(x-4) is almost there, but you need to multiply all the factors back together.

(x - 2)(x - 4)

use FOIL or distributive property or area model(box) method to multiply and get

x^2 - 6x + 8

Then multiply in the x using distributive property.

f(x) = x(x^2-6x+8)

f(x) = x^3 - 6x^2 + 8x

That's the final answer (the third choice of answers on your post.) I think of this as a "working backwards" problem because you start with solutions (zeros means solutions!) and work backwards to find factors, then the function.

Please at least just look to see if its
easy for you

Answers

Answer:

4/10

2/5

6/15

Step-by-step explanation:

We can change all fraction to decimal :

2/10 = 0.2

1/10 = 0.1

4/10 = 0.4

2/5 = 0.4

4/5 = 0.8

6/15 = 0.4

Base on that we can see that 4/10, 2/5, and 6/15 are equal

~lenvy~

Bethany is making a rectangular fenced-in area for her rabbit in her yard. The area measures 4 3/4 feet wide by 2 yards long. What is the total length of fencing, in feet, that Bethany will need?​

Answers

10 3/4 she will for fencing

The triangles on the grid below represent a translation.
4
3
0
2
1
b
8
54-32-14
1 2
3
b
8
To form the image, the pre-image moved
five units right and three units up.
two units right and three units up.
Mark this and return
Save and Exit
Next

Answers

Answer:

Five units right and three units up.

If you notice there's a ' on the green triangle (a',b',c')

That means that the blue triangle was translated to get to the green triangle

Why Is HDL called the "good cholesterol"?
A. It widens the arteries
B. None apply
C. It returns cholesterol to the liver to be broken down
D. It bring cholesterol to the lungs to be broken down

Answers

Answer:

b

Step-by-step explanation:

It helps remove any forms of cholesterol from your blood strem.

Im supper sorry if i do not get it...

Expand binomial (x+1)1

Answers

Answer:

x + 1

Step-by-step explanation:

Given binomial

(x + 1)¹

Use the property

a¹ = a

The binomial remains same without brackets

(x + 1)¹ = x + 1
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