solve the system by substitution 3x-y=10 2x=y

Answers

Answer 1

Answer

X=10 and y=20

Step-by-step explanation:

since y=2x, you need to substitute that into the equation to get:

3x-(2x)=10

And evaluate:

x=10

Then substitute 10 into the equation: 2x=y:

2(10)=y

evaluate:

20=y

Now go back to the original equation to check your answer and substitute the values in:

3(10)-(20)=10

30-20=10

10=10

Answer 2
X=10, Y=20
steps
1) substitute 2x into the equation for Y
2) combine like terms ( 3x and -2x which equals 1x or x)
3) solve for x’s value (10)
4) plug in x’s value to solve for y
5) plug values into original equation to check work
Solve The System By Substitution 3x-y=10 2x=y

Related Questions

40 PONITS
A spinner with 3 equal sectors is shown in the figure. The colors Green, Blue and Red are marked on it. The arrow points to Green. Two cards are shown on the right side. Their colors are Purple and Green. Which table correctly identifies the sample space of spinning the spinner and then selecting a card? Results of the spin Card Color Green Blue Red Purple Green, Purple Blue, Purple Red, Purple Green Green, Green Blue, Green Red, Green Results of the spin Card Color Green Blue Red Purple Green, Purple Blue, Green Red, Green Green Green, Green Blue, Blue Red, Red Results of the spin Card Color Green Blue Red Purple Green, Green Blue, Blue Red, Red Green Green, Purple Blue, Green Red, Green Results of the spin Card Color Green Blue Red Purple Green, Purple Blue, Purple Red, Purple Green Green, Green Blue, Blue Red, Red

Answers

Hence, second option is the true option.                            {Result of spin, card color}

{Green, Purple} {Yellow, Purple}  {Purple, Purple }

{Green, Green}  {Yellow, Green}  {Purple, Green}

Step-by-step explanation:

It is given that:

A spinner with 3 equal sectors is shown in the figure. The colors Green, Yellow, and Purple are marked on it.

Two cards are shown on the right side. Their colors are Purple and Green.

The table that identifies the sample space of spinning the spinner and then selecting  a card is:

     {Result of spin, card color}

{Green, Purple} {Yellow, Purple}  {Purple, Purple }

{Green, Green}  {Yellow, Green}  {Purple, Green}

( Since in rest of the options the red color in the sample space but there is no card or no such color in the spin which is red)

Each color on the wheel can match with each color of the cards:

Wheel has green, blue red

Cards are purple and green:

The combinations could be:

Green purple , green green, blue purple, blue green, red purple, red green

Salma and Jared each threw 5 darts at the target shown. Salma scored 19 points by landing 2 darts in A and 3 in B. Jared scored 17 points by landing 1 dart in A and 4 in B. How many points are given for a dart landing in A?

Answers

Answer:

5

Step-by-step explanation:

this can be solved using simultaneous equation

2a + 3b = 19  equation 1

1a + 4b = 17    equation 2

Multiply equation 2 by 2

2a + 8b = 34  equation 3

Subtract equation 1 from 3

5b = 15

b = 3

Substitute for b in equation 1

2a + 3(3) = 19

2a = 9 = 19

2a = 10

a = 5

Answer:

Step-by-step explanation:

2a + 3b = 19 equation 1

1a + 4b = 17 equation 2

Multiply equation 2 by 2

2a + 8b = 34 equation 3

Subtract equation 1 from 3

5b = 15

b = 3

Substitute for b in equation 1

2a + 3(3) = 19

2a = 9 = 19

2a = 10

a = 5

Which quadrilateral makes this statement true?
Quadrilateral ABCD
В
46
26
26
A (98
98)
118
11.7 11.7
D
Quadrilateral ABCD

Answers

Answer:i have no idea

Step-by-step explanation:

Does n e one get t?

Jordan bought StartFraction 9 Over 16 EndFraction of a pound of sunflower seeds and divided them evenly into 9 snack bags for his lunch. What is the weight of sunflower seeds in each snack bag?
StartFraction 1 Over 16 EndFraction of a pound
StartFraction 1 Over 9 EndFraction of a pound
StartFraction 16 Over 81 EndFraction of a pound
StartFraction 81 Over 16 EndFraction pounds

Answers

Answer:

StartFraction 1 Over 16 EndFraction of a pound

Step-by-step explanation:

Total pounds of sunflower seeds Jordan bought = 9/16 of a pound

Number of snack bags for his lunch = 9

What is the weight of sunflower seeds in each snack bag?

Weight of sunflower seeds in each snack bag = Total pounds of sunflower seeds Jordan bought / Number of snack bags for his lunch

= 9/16 ÷ 9

= 9/16 × 1/9

= (9*1) / (16*9)

= 9 / 144

= 1/16

Weight of sunflower seeds in each snack bag = 1/16 of a pound

Answer:

1/16 of a pound aka A is the correct answer.

Step-by-step explanation:

A cylinder has a height of 16 yards. Its base has a radius of 7 yards.
Find its volume, in cubic yards, to the nearest tenth. Use 3.14 or the
calculator value for pi.

Answers

Answer:

[tex]\boxed {\boxed {\sf v= 2463.0 \ yd^3}}[/tex]

Step-by-step explanation:

The volume of a cylinder is found using the following formula:

[tex]v= \pi r^2h[/tex]

The height of the cylinder is 16 yards and the radius is 7 yards. Let's use the pi button on a calculator for pi. Substitute these values into the formula.

[tex]v= \pi* (7 \ yd)^2 * 16 \ yd[/tex]

Solve the exponent.

(7 yd)²= 7 yd* 7 yd= 49 yd²

[tex]v= \pi * 49 \ yd^2 *16 \ yd[/tex]

Multiply the three numbers together.

[tex]v= \pi *784 \ yd^3\\v=2463.00864041 \ yd ^3[/tex]

Round to the nearest tenth.

[tex]2463.0\underline0864041[/tex]

The 0 in the hundredth place tells us to leave the 0 in the tenth place.

[tex]v= 2463.0 \ yd^3[/tex]

The volume of the cylinder is 2463.0 cubic yards.

The radius of a circle is 6 centimeters.
Enter the area of the circle, in square centimeters.
Round your answer to the nearest hundredth.

Answers

Answer:

113.04

Step-by-step explanation:

Enter the area of the circle, in square centimeters. Round your answer to the nearest hundredth. 1.

Kelsha is putting money into a savings account. She starts with $750 in the savings account, and each week she adds $30. Let S represent the total amount of money in the savings account (in dollars), and let W represent the number of weeks Keisha has been adding money. Write an equation relating Sto W. Then use this equation to find the total amount of money in the savings account after 14 weeks.​

Answers

Answer:

s=750+30W, after 14 weeks she has 1170$

Step-by-step explanation:

Answer:

750+30w=s     750+(30*14)=1,170

Step-by-step explanation:

i think this is it

please help
hahahahaaahahaahahaaha

Answers

Answer:

22

Step-by-step explanation:

( 36 / 4 * 2 - 6 ) + 1 * 2 + 8

( 9 * 2 - 6 ) + 1 * 2 + 8

( 18 - 6 ) + 1 * 2 + 8

( 12 ) + 1 * 2 + 8

( 12 ) + 2 + 8

( 12 ) + 10

22

Jim wants to make a 4 letter password. He cannot repeat any letters in his password.How many combinations can he make

Answers

My previous answer was incorrect, sorry for that... the correct answer would be 358,800

[tex]\huge\text{Hey there!}[/tex]

[tex]\large\text{He has 26 letters all together (A - Z)}[/tex]

[tex]\large\text{25 if he starts from his second letter (B - Z)}[/tex]

[tex]\large\text{24 if he starts from his third letter (C - Z)}[/tex]

[tex]\large\text{ 23 if he starts from his fourth letter (D - Z)}[/tex]

[tex]\mathsf{26\times25\times24\times23}[/tex]

[tex]\mathsf{26\times 25 = \bf 650}[/tex]

[tex]\mathsf{650\times24\times23}[/tex]

[tex]\mathsf{650\times24 = \bf 15,600}[/tex]

[tex]\mathsf{15,600\times 23}[/tex]

[tex]\mathsf{ =\bf 358,800}[/tex]

[tex]\boxed{\boxed{\large\text{Answer: \huge \bf 358,800}}}\huge\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

A tree in Aldo's backyard has been growing for 2 2/5 years. The tree is 1/4 meters tall. What is the unit rate in meters per year? please I need this answer fast!!!

Answers

Answer:

The correct answer is D

Step-by-step explanation:

The division is one of the four fundamental arithmetic operations. The unit rate in meters per year is 0.10417.

What is Division?

The division is one of the four fundamental arithmetic operations, which tells us how the numbers are combined to form a new one.

Given A tree in Aldo's backyard has been growing for 2 2/5 years. Also, the tree is 1/4 meters tall. Therefore,  the unit rate in meters per year can be written as,

[tex]{\rm Unit\ rate} = \dfrac{\frac14}{2\frac25} = \dfrac{1}{4} \times \dfrac{5}{12} = 0.10417[/tex]

Hence, the unit rate in meters per year is 0.10417.

Learn more about Division:

https://brainly.com/question/369266

#SPJ2

Two sides of a right triangle have lengths of 72 cm and 97 cm. The third side is not the hypotenuse. How
long is the third side?
45 cm
A
B
121 cm
65 cm
25cm ???

Answers

the third side is 25cm

URGENT 100 POINTS (all fake answers will be removed and i will take the points back)

Quadrilateral ABCD ​ is inscribed in circle O.



What is ​ m∠A ​ ?

Answers

Answer:

42 degrees (check attachements) hope it helps!

Step-by-step explanation:

Answer:

42

Step-by-step explanation:

Opposite angles of an inscribed quadrilateral are supplementary. We use that information and angles B and D to find the value of x. Then we use the value of x to find the measure of angle A.

m<B + m<D = 180

2x + 3x - 5 = 180

5x = 185

x = 37

m<A = x + 5

m<A = 37 + 5

m<A = 42

PLEASE!!!

A gym offers two different membership options. In the first option, new members pay a one-time fee of $50 and a monthly fee of $30. In the second option, members pay a one-time fee of $100 and a monthly fee of $20.
Suppose c is the total membership cost for m months. The two equations that model the two membership options are c = 30m + 50 and c = 20m + 100.

Part A
1. To find out when the cost will be equal, you will need to solve for m using substitution. Substitute the expression for the cost from the first equation into the cost, c, in the second equation.

2. Solve the equation in number 1 for m

3. Would you get the same solution if you substituted the expression for cost in the second option for c in the first equation? Why?

Answers

9514 1404 393

Answer:

30m +50 = 20m +100m = 5yes. symmetric property of equality.

Step-by-step explanation:

1. The expression for c in the first equation is (30m+50). Substituting that for c in the equation ...

  c = 20m +100

gives you ...

  30m +50 = 20m +100

__

2. Adding -50-20m to both sides gives ...

  10m = 50

  m = 5 . . . . . . . divide by 10

__

3. Doing the substitution in reverse, you would substitute (20m+100) for c in the equation ...

  c = 30m +50

to get ...

  20m +100 = 30m +50

This is the equation of part 1 with the expressions swapped to the other side of the equal sign. The symmetric property of equality tells you that changing sides of the equal sign does not change the value of the variable(s).

You get the same solution.

Nancy's Bagel Shop recorded the number of bagels it recently sold of each type.
plain bagels 3
raisin bagels 1
sesame seed bagels 5
pumpernickel bagels 2
whole wheat bagels 4

Considering this data, how many of the next 20 bagels sold should you expect to be plain bagels?

Answers

Answer:

4

Step-by-step explanation:

Sum and Divide

Please help I'll mark brainliest

Answers

Answer:

(-5,6)

Step-by-step explanation:

5(-5) +6y =11

-25 +6y = 11

6y = 36

y = 6

Answer: (-5,6)
Hope this helps

The midpoint of AB is M(-4, 2). If the coordinates of A are (-6, 5), what are the coordinates of B?

Answers

answer is most likely (5,6)

Answer:

figure it out

Step-by-step explanation:

NEED HELP, DUE SOON! Find the area of the composite figure below and then chose the correct answer.

Answers

Answer:

A) 288.62

Step-by-step explanation:

10.4×15.3= 159.12

10.4²+15.3²= X²

342.25= X²

18.5= X

7×18.5= 129.5

129.5+159.12= 288.62

A rental car agency charges $14 per day plus 12 cents per mile to rent a certain car. Another agency charges $19 per day plus 10 cents per mile to rent the same car. How many miles per day will have to be driven for the cost of a car from the first agency to equal the cost of a car from the second agency?

Answers

Answer: The correct answer is 250 miles per day. I just completed this question myself and I got it correct

Step-by-step explanation:

I have 40 oranges i give 7 to john and 9 to bala what fraction did i give away reduce to the lowest term

Answers

Answer:

24.

Step-by-step explanation:

I think. I'm not sure sorry! I hope I helped a little though.

solve for x. please please i need help help me please

Answers

The answer is 11 because the longer side would be 16

Five of every six gifts were wrapped in blue paper. If there are 25 gifts wrapped in blue paper, how many gifts are there altogether?

Answers

Answer:

There are 30 gifts altogether.

Pleaseeee , I’ll give you Brainlest:)

Answers

Answer:

30 days

Step-by-step explanation:

Answer:

30

Step-by-step explanation:

10^12=1000000000000

1000000000000/24=4.66666666_

that means 4 and a half days but put in 4.5.(I didn't feel like putting the rest of the work i forgot, its 30

WILL GIVE BRAINLIEST FOR RIGHT ANSWER

Answers

Answer:

1.5

Step-by-step explanation:

2 ft. / the number of sides for width (2) = 1 then 3 ft. / number of sides for length (2) = 1.5

1.5 x 1 = 1.5

Kailey wrote 8,912,000 in scientific notation as 89.12 times 10 Superscript 5. Which statement best describes Kailey's work?

Answers

Answer:

Could You Please Explain More?

Step-by-step explanation:

Could you post the full question?

- 3y + 4xy -2x^2 + 2x + y^2 - 4xy + 2y + 3x^2​

Answers

Answer:

x² + y² + 2x - y

Step-by-step explanation:

-3y + 4xy - 2x² + 2x + y² - 4xy + 2y + 3x²

3x² - 2x² + y² + 2x - 3y + 2y + 4xy - 4xy

x² + y² + 2x - y

Please help me with 1,2,3,4,5,6,7,8,9 tell me how u get it and the answer please I really need help

Answers

Answer:

Step-by-step explanation:

Ok so for question one we use the Pythagorean theorem, which is a^2+b^2=c^2

a is the shortest leg, b is the leg that is not the hypotenuse. and c is the hypotenuse which is the opposite leg to the right angle.

Question 1: a=9,b=12,c=x

(9)^2+(12)^2=(x)^2

81+144=(x)^2

225=(x)^2

x=15

Question 2: a=10,b=24,c=x

(10)^2+(24)^2=(x)^2

100+576=(x)^2

676=(x)^2

x=26

Question 3: a=3,b=7,c=x

(3)^2+(7)^2=(x)^2

9+49=(x)^2

58=(x)^2

x=root58, or 7.615773

Question 4: a=6,b=x, c=10

(6)^2+(x)^2=(10)^2

36+(x)^2=100

Subtract 36 from both sides

(x)^2=64

x=8

Question 5: a=6,b=x, c=24

(6)^2+(x)^2=(24)^2

36+(x)^2=576

Subtract 36 from both sides

(x)^2=540

x=6root15, or 23.2379

Question 6: a=1, b=1, c=x

(1)^2+(1)^2=(x)^2

1+1=(x)^2

2=(x)^2

x=root2, or 1.414213562

Question 7: a=8, b=x, c=21

(8)^2+(x)^2=(21)^2

64+(x)^2=441

Subtract 64 from both sides

(x)^2=377

x=root377, or 19.41648784

Question 8: a=24, b=x, c=30

(24)^2+(x)^2=(30)^2

576+(x)^2=900

Subtract 576 from both sides

(x)^2=324

x=18

Question 9: a=5,b=9, c=x

(5)^2+(9)^2=(x)^2

25+81=(x)^2

106=(x)^2

x=root106, or 10.29563014

Question 9 Part B: a=3, b=5, c=y

(3)^2+(5)^2=(y)^2

9+25=(y)^2

34=(y)^2

root34, or 5.830951895=y

PLEASE HELP AND NO FILES PLEASE
1. you spin a penny and a nickel on a table. The penny lands on heads and the nickel lands on tails. find the probability

2. A container has 7 green buttons, 3 yellow buttons, and 4 blue buttons. You reach in and randomly draw out a blue button. You KEEP the blue button and reach in again to draw out a second blue button. find the probability.

Answers

Answer:

Step-by-step explanation:

For question 1 is a 50% chance on going on either heads or tails

for question 2 it will be green there is less of the blue buttons and more green

Two angles are supplementary. One angle is five times larger than the other. What are the measures of the two angles.​

Answers

Answer:

30 degrees ; 150 degrees

Step-by-step explanation:

1) rememeber that two supplementary angles have their sum equals to 180 degrees

2) write an equation with the given information

x + 5x = 180

2) solve the equation

- added up the terms with x

6x = 180

- divide the two members by 6

x = 30

- find the second angle by multiplying 30 by 5

150

Please help this is due in 10 mins

Answers

Answer:

138.80

Step-by-step explanation:

I took 149.99 times 15% then times that by the tax rate to get your final answer.

HELP NEEDED PLEASE!!!! This math question confuses me. I thought the line didn't pass through any other point but I cant figure it out so please help me!

Answers

Answer:

B

Step-by-step explanation:

So wiggly, remember that slope is change in y/change in x, or in simpler terms, y/x. Thinking of this, y/x must simplyfy to -3. Or, you can think of it as -3/1.

So know that we have rewrote this as a slope of -3/1, lets use it. Where do we start? Well, we must start at point A, which is at 2 x and 7 y.

Now, going to the  RIGHT(+1x) and going DOWN(-3y) we will go from 2x and 7y to 3x and 4y.

Are we on a point yet? Nope, lets do this again.

Now going to RIGHT again(+1x) and going DOWN again(-3y) we will go from 13x and 4y to 4x and 1y.

Are we on a point yet? Still no, lets try this one more time.

Now going to RIGHT again(+1x) and going DOWN again(-3y) we will go from 4x and 1y to 5x and -2y.

Are we on a point? YUP. We cna see that point B is at 5x and -2y.

Hope you get it right ;)

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