10x+4y=−2
5x−2y=2


Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
Multiply the bottom equation by 2, then subtract the bottom equation from the top equation.

(Choice B)
B
Multiply the top equation by 1/2, then add the equations.


(choice C)
Add the equations.

Answers

Answer 1
choice c us the correct answer

Related Questions

how would you differentiate this problem using the quotient rule?

Answers

rewrite the square root of X as X^ 1/2. Then take the derivative. Since 1/3 is a constant with respect to X you can pull that out. So, you should have
1/3 d/dx [ (2x^2-x^5)/3x^1/2].

Then factor x^2 out of 2x^2-x^5.

Then by using the negative exponent rule you should have

1/3 d/dx [ x^2(2-x^3)x^-1/2 ]

Then multiply x^2 by x ^-1/2 by adding the exponents.

1/3 d/dx [ x^3/2 (2-x^3)]

Then differentiate.

You should get x^1/2 - (3x^7/2)/2.

I hope that helps.

A cylinder has a volume of 371.776 cubic centimeters. The diameter of the cylinder is 8 cm. What is the height of the cylinder? (Assume = 3.14)

Answers

Cylinder volume formula:

V=πr^2h

Substitute given values into the formula

Note: use 3.14 for pi

Diameter is twice the radius, so if diameter is 8 then radius is 4

371.776 = (3.14)(4^2)h

Use h for height because we don't know the height

Okay, so let's try to get the h by itself on the left side of the equation

So begin by getting rid of 3.14 by dividing it by both sides

371.776/3.14 = 118.4

3.14/3.14 = 1 (don't put 1, just remove the 3.14 from the right side)

So now we have:

118.4 = 4^2(h)

Now we can get rid of 4^2

Start by actually squaring it and then divide it from both sides

118.4 = 16(h) (4^2 = 16)

118.4/16 = 7.4

16/16 = 1 (dont put 1, just drop it)

So now we have

7.4 = h

Now we have h by itself! So h = 7.4

let's  test it by putting it in the cylinder volume formula

V = πr^2h

371.776 = (3.14)(4^2)(7.4)

371.776 = (3.14)(16)(7.4)

371.776 = 50.24(7.4)

371.776 = 371.776

7.4 is your answer, if you have any questions, feel free to ask

I'm not quite sure about this question, can someone please help.

Answers

So the right answer is 78.57 in^2.

Look at the attached picture

Hope it will help you

Good luck on your assignment

73.6 is the answer
Hope u understand solution.

what is the answer to 6a-15< 2(3a+4)?

Answers

Answer:

3a<38

Step-by-step explanation:

The figure is made of rectangular prisms. What is the volume?

Answers

Answer:

So the first step is to do times the l that is 18 then times the width that is 6 after that times the height that is 12. The other number is from the other side so you have to times the other number too. So the answer will be c.

Step-by-step explanation:

As we the the formula for a rectangular prism is l*w*h

Answer:

2,160cm³

Step-by-step explanation:

Good luck kiddos :)

Another khan academy question

Answers

First off, notice that this is a right triangle.

You can use this to help write equation.

Equation : x+ (4x-85)=90. The correct answer is "c"

Hgxbxhdhdhdjc Nc FDA faces have

3. Fine the value of x.
A) 3.5
B)7
C) 5
D)10

Answers

Answer:

I would say B

Step-by-step explanation:

I think

I would think the sender was b

You are wakeboarding on a river. You travel 2 miles downstream to a marina for supplies, and then you travel 3 miles upstream to a dock. The boat travels x miles per hour during the entire trip, and the river current is 3 miles per hour.

How long will the trip take when then speed of the boat is 18 miles per hour? Round to the nearest tenth minute.

Answers

Answer:

17.3

Step-by-step explanation:

(2+18)=(20mph*2miles)=6 minute

(18-2)=16mph*3miles=11.25

17.25

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If a certain statistician has an of 122 , what percent of the population has a lower IQ?
A. 47%
B. 93%
C. 22%
D. 99%
E. 7%

Answers

Answer:

B. 93%

Step-by-step explanation:

Find the z-score:

z = (x − μ) / σ

z = (122 − 100) / 15

z = 1.47

Find the probability using a calculator or z-score table.

P(Z < 1.47) = 0.93

Help asap please ! Please explain too

Answers

Answer:

D) 35

Step-by-step explanation:

angles that are opposite are equal, so the 45 degree angles is in th triangle too. angles on a straight lines are equal to 180, so 180 - 80 = 100.

So far we have two of the angles, 100+45=145

Angles in a triangle are equal to 180, so 180-145 =35

vertically opposite angles are the same, so the ? is 35 degrees

Hope that helps

Find z 1 z 2 if z 1 = 3(cos37° + isin37°) and z 2 = (cos53° + isin53°

Answers

Answer:

[tex]Z_{1} Z_{2} = 3 i[/tex]

Step-by-step explanation:

Step(i):-

Given z 1 = 3(cos 37° + i sin 37°)

          z 2 = (cos 53° + i sin 53°)

by using complex numbers

      [tex]Z_{1} = r_{1} ( cos\alpha_{1} + isin\alpha_{1} ) = r_{1} cis\alpha _{1}[/tex]

      [tex]Z_{2} = r_{2} ( cos\alpha_{2} + isin\alpha_{2} ) = r_{2} cis\alpha _{2}[/tex]

step(ii):-

now

   [tex]Z_{1} Z_{2} = r_{1} r_{2} cis (\alpha _{1} + \alpha _{2})[/tex]

       z ₁ = 3(cos 37° + i sin 37°) = 3 c i s 37°

       z ₂ = (cos 53° + i sin 53°) = c i s 53°

we will use formula

     [tex]Z_{1} Z_{2} = r_{1} r_{2} cis (\alpha _{1} + \alpha _{2})[/tex]

     [tex]Z_{1} Z_{2} = 3 X 1 cis (37 + 53) = 3cis (90) = 3 cis(\frac{\pi }{2} )[/tex]

    [tex]Z_{1} Z_{2} = 3(cos(\frac{\pi }{2} ) + isin(\frac{\pi }{2}))[/tex]

    [tex]Z_{1} Z_{2} = 3(0 + i (1)) = 3 i[/tex]

Conclusion:-

       [tex]Z_{1} Z_{2} = 3 i[/tex]

       

 

     

Answer:

2i

Step-by-step explanation:

z 2 = 2/3(cos53° + isin53°

I got it right on odyssey ware

What do you add to 2 2/9 to make 4

Answers

Answer:

I believe 1 7/9 will give you 4

1 and 7/9ths because 1+2 =3 and than add up the fractions that gives you another 1

I WILL GIVE YOU BRAINLIEST, AND 30 POINTS SO PLEASE HELP ME, IT'S URGENT!

Answers

Answer:

Answer is option b)

[tex] {(x - 3)}^{2} + {(y - 4)}^{2} = 400[/tex]

Your guess was right.

Step-by-step explanation:

[tex]the \: question \: states \: that \: \\ distance \: between \: two \: points \: is \: 20 \: units \: \\ and \: the \: two \: points \: are \: (x,y) \: \: and \: \: (3 ,- 4) \\ distance \: formula \\ = \sqrt{ {(x1 - x2) }^{2} + {(y1 - y2)}^{2} } \\ on \: substituting \: the \: values \: in \: formula \\ 20 = \sqrt{ {(x - 3)}^{2} + {(y - ( - 4))}^{2} } \\ 20 = \sqrt{ {(x - 3)}^{2} + {(y + 4)}^{2} } \\ now \: squaring \: on \: both \: sides \\ 400 = {(x - 3)}^{2} + {(y + 4)}^{2} \\ hence \: the \: answer \: is \: option \: b)[/tex]

HAVE A NICE DAY!

THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION.

billy wishes to find the equation of a circle. this time however he only knows the end of the diameter are located at (12, 17 ) and (8, -1). below is the equation he came up with. Which part of the equation is incorrect?

Answers

Answer:

Y-8

Step-by-step explanation:

The length of a rectangle is twice its width. If the width is 10, what is the area? Can you help me? Please?

Answers

Answer:

Area is 200

Step-by-step explanation:

First off since it said that the width is 10, We add another 10 to the length, making it 20.

Next, you multiply 20 and 10 together,

Giving you 200.

I hope I was helpful!

Answer:

200

Step-by-step explanation:

the formula for area is length * width you would 10 * 200

The price of a car is £15400 before it is reduced by 8%.
How much does it cost after the reduction?

Answers

Answer:

14168

Step-by-step explanation:

15400 / 100 x 8 = 1232

1232 = 8%

15400 - 1232 = 14168

There are 30 marbles in a bag. You randomly choose 20 marbles from the bag. The results are shown in the table. Predict the total number of red marbles.

Color
Blue 6
Red 12
Yellow 2
There are about how many red marbles?

Answers

Answer:

12 because if you add 6 and 12

Step-by-step explanation:

hope it helps uou !!

Answer:

It's 12

Step-by-step explanation:

hope it helps you !!

Substitute x and y in the equation

Answers

B. y=50x

If you look at the graph, you can see that in each dot the y equals to 50 Times x.
Such at the first dot, the location is at (1,50). 1*50=50
And at the second dot the location is at (2,100). 50*2=100
And at the last dot, the location is at (8,400). 8*50=400

What is the surface of a box 8“ x 7“ x 2“

Answers

Answer:

172 inches squared

Step-by-step explanation:

(8 x 7)2= 112

(7 x 2)2= 28

(8 x 2)2= 32

32 + 28+ 112

172 inches squared

help rsm 2.1/x+1 4/5=3/10x

Answers

Answer:

two minus one times .........

The solution to the equation is x = 7, -1.

What is a quadratic equation?

The equation of the form ax² + bx +c is known as a quadratic equation.

The given equation is 2.1/x + 1 (4/5) =(3/10)x.

Simplify the equation as follows:

2.1/x + 1 (4/5) =(3/10)x

2.1/x + 9/5 = (3/10)x

2.1 + (9/5)x = (3/10)x²

21 + 18x = 3x²

3x² - 18x -21 =0

3x² - 21x + 3x -21 =0

3x(x - 7) + 3(x - 7) =0

(x - 7)(3x + 3) =0

x - 7 =0 or 3x + 3 =0

x = 7 or x = -1

Hence, the solution to the equation is x = 7, -1.

Learn more about the quadratic equations:

https://brainly.com/question/17177510

#SPJ2

Lily wants to buy a new smartphone. She has $500 to spend. List three ways she can get a good deal.

Answers

Answer:

get a coupon find a cheap on or steal it or get a discount

Answer:

She could use coupon deals, she could research what stores have it cheapest, see what deals online has

Factor. 125x^3-64y^3

Answers

Answer:

= 5x - 4y

Step-by-step explanation:

125x³- 64y³

= 5x - 4y

Answer:

Hello,

(5x)^3 - (4y)^3

Step-by-step explanation:

125 = 5^3

64 = 4^3

125 x^3 - 64 y^3 = (5x)^3 - (4y)^3

The square of 9 less than a number is 3 less than the number. What is the number?
-12 or 7
-12 or -7
- 7 or 12
7 or 12

Answers

Answer:

Let the number be x, then (x - 9)^2 = x - 3

x^2 - 18x + 81 = x - 3

x^2 - 19x + 84 = 0

(x - 12)(x - 7) = 0

x = 12 or 7

Step-by-step explanation:

select the one answer. (x+5)-4y

Answers

Answer:

B) The sum of x and 5 subtracted by 4 times y.

Step-by-step explanation:

(x + 5) = the sum of x and 5

- = subtracted by

4y = 4 times y

"The sum of x and 5 subtracted by 4 times y).

B) is your answer.

~

Answer:

B/the second one

Step-by-step explanation:

PLEASE HELP FAST

Which transformation preserves size and shape. Choose ALL correct answers

A) Dilations
B) Rotations
C) Translations
D) Reflections

Question 2

Which transformations preserve orientation?

A) Translations
B) Rotations
C) Reflections
D) Dilations

Answers

Answer:

A) Dilation  C)Reflections or B) Rotations

Step-by-step explanation:

Which point is the centroid of the triangle?
Question 5 options:

A)

D

B)

G

C)

F

D)

C

Answers

Answer:

The answer is B) G

Step-by-step explanation:

G is at the center of the triangle. It is a centroid because it is where all the medians meet.

A pizza parlor charges $18 for a plain pizza and charges $0.75 for each additional topping.
Which of the following best models the cost of a pizza?
y = 18x +0.75
y = 13.5x + 18
y = 180.752
O y = 0.75x + 18

Answers

Answer:

the last one

Step-by-step explanation:

well you have 18 pizzas total, and each topping is 0.75. so let's say u want two toppings you would do 75 ×2 and so on, you would label the question

Y= 0.75x + 18

Why are the units of area squared? How does this help us remember the formula for area of a circle?

Answers

Answer:

Area is a size measurement of a two-dimensional surface. Those dimensions (x and y) are perpendicular to each other, and thats why it is squared.

The figure below is a net for a rectangular prism. Side a = 22 inches, side b = 18 inches, and side c = 11 inches. What is the surface area of this figure?
A. 1,430 square inches
B. 1,672 square inches
C. 4,356 square inches
D. 836 square inches

Answers

the answer is b. 1672

2 points
Cindy is painting her house. She paints 34 1/2 square feet in 3/4 hour. At
this rate, how many square feet can she paint each hour? *

Answers

Answer:

102 sqaure feet                                                      

Step-by-step explanation:

Other Questions
What does the chart show about the money the state collects to provide services? A majority comes from taxes on individual property.A majority comes from peoples paychecks.A majority comes from the sale of certain goods.A majority comes from a portion of business profits The top, exposed layer a has undergoneA. an uncomformityB. erosionC. tiltingD. foldingP.S. I NEED THIS LIKE NOW!I WILL MARK BRAINLIEST The idea that the voice in Twelfth Song of Thunder seems to be all around suggests that the Navajo Jen has a newer car than Amelie, and it has One-third the miles of Amelies car. Amelies car has 45,000 miles. Which of the following equations model this situation? Select all that apply.3(m) = 45,0001/3 + m = 45,000m = (1/3) (45,000)m = 3(45,000)m = 1/3 = 45,000 Bye how much more coffe is in the dads mug if you know the area How would you find the diameter of a circle? A_____ can rush downhill as a huge mass of soil,water,and rock,leaving a bare scar in the hillside why was the city of Florence the starting place for the renaissince Using media allows us to:A. be completely passive.B. avoid distractions and fun.C. Isolate ourselves from others.D. contribute and create. :Which is the solution to 7x > 49? One group that improved education in cities by opening private religiousschools was:O A. Catholic immigrant groups.B. Federal government programs.C. State government programs.O D. Free African Americans.SUBMIT When throwing the ball far you shouldA.Not step and only throw using your armB.Step with the same foot, rotate your body and follow throughC.Step with your opposite foot, rotate your body and follow throughD.Step with the opposite foot and only throw using your arm Which are plot elements of "Daedalus and Icarus"? Check all that apply.The king asks Daedalus to build a cage for his monster.Daedalus says he will not build a cage for the king's monster.Daedalus and Icarus are locked in the king's tower.Daedalus makes wings from wood, wax, and feathers.Icarus and Daedalus escape from the king's tower by boat. someone please help me this is the only question stopping me from graduatin class 2020 PLEASE HELP WHEN YOU SEE THIS .A person invests 10000 dollars in a bank. The bank pays 5.5% interest compoundedmonthly. To the nearest tenth of a year, how long must theperson leave thein the bank until it reaches 27400 dollars?leave the moneyrA = P(1 + -)ntn Match the function to the structure or gland how to make a dot plot Solve for 2.Write the smaller solution first, and the larger solution second.(3x 6)(-x + 3) = 0smaller x =larger x = What are the roles of people for the government?