Solve the following simultaneous equations by elimination
A) x+y=2
x-y-1=0

B) x+y=5
x-y=7

C) x+y=17
x-y=1

D) 5x+y=29
5x-y=11

Answers

Answer 1

Answer:

0

8

0

9

0

9

9

098098809667906432


Related Questions

2. What number is a common multiple of
5 and 9?

Answers

Pretty sure the answer is 45


if you could respond with the work shown that would be amazing! i rate people very nicely!! this is due before 7 AM EST time :)

Answers

Answer:

110 in.²

Step-by-step explanation:

The figure is composed of a parallelogram and a rectangle

Therefore, the area of the figure = area of rectangle + area of parallelogram

= Length*Width + base*height

Length = 10 in.

Width = 6 in.

base = 10 in.

height = 5 in.

Area of the figure = 10*6 + 10*5

= 60 + 50

= 110 in.²


Help please look at picture!!^^

Answers

9514 1404 393

Answer:

  8167.14 m²

Step-by-step explanation:

The radius of the circle is half the diameter, so is 51 m. The area of the circle is given by the formula ...

  A = πr²

Filling in the given numbers, we find the area to be ...

  A = 3.14(51 m)² ≈ 8167.14 m²

When is it best to solve a system of equations using substitution?​

Answers

Answer:

It is best to solve a system of equations using substitution when one of the equations isolates one of the variables, or when the coefficient of one of the variables is 1 or -1.

Step-by-step explanation:

This makes it easier to substitute one variable for the other, allowing you to solve for the remaining variable. It is also a good idea to check the solution back in the original equations just to make sure it is a valid solution

Answer:

Answer Below

Step-by-step explanation:

It is best to use substitution if one of the variables is isolated or has a coefficient of 1 or -1.

Popcorn at the Movies - Exit Slip

You and a friend go to the movies and decide to share a large bucket of popcorn. Write a story to describe the graph.

Answers

i am so sorry, but the picture you uploaded is blank, please reach out so i can view it :)

is the pie sign a integer, rational number or irrational number?​

Answers

Answer:

pi is considered to be irrational because it is a non-terminating, non-repeating decimal

Step-by-step explanation:

PI is an irrational number ✨

A hospital near a ski resort records the type of injuries treated during ski season and other seasons and other seasons over a year. the results shown in the table will help determine the medical staff that is required at different times of the year. according to the data in the table, what is the probability that a patient will need to be treated with a broken bone during ski season.

Answers

Answer:

The answer is C

Step-by-step explanation:

You have to divide both numerators then the denominater.

So, it would look like:  160 over 90 x 100 over 290

160x100=16   90x290=25     16/25

             

find the surface area of the prism ​

Answers

Answer:

62ft²

Step-by-step explanation:

Hi there!

Surface area is calculated by this formula:

2(length*width)+2(width*height)+2(length*height)

*note: we multiply each area by 2, as the prisim has 6 faces, or 2 of each face

we're given a length of 5 ft, a width of 2 ft, and a height of 3ft

now let's calculate the surface area

to find the area of the first two faces:

2(length*width)

2(5*2)

2(10)

20 ft²

now to find the area of the second two faces:

2(width*height)

2(2*3)

2(6)

12 ft²

finally, find the area of the last two faces:

2(length*height)

2(3*5)

2(15)

30 ft²

now add up all the values

SA=20+12+30=62 ft²

your answer is 62ft²

Hope this helps!

Find the volume of this square
based pyramid.
10 in
12 in
[? ]in3

Answers

Answer:

[tex]v=480 ~in^3[/tex]

Step-by-step explanation:

[tex]v=1/3 Bh[/tex]

[tex]1/3(12)^210=[/tex]

[tex]480 ~in^3[/tex]

------------------------

hope it helps...

have a great day!!!

If a family has 7 children, in how many ways could the parents have 4 boys and 3 girls as children?

Answers

Answer:

add the 3 and 4

Step-by-step explanation:

How many 25 cents are there in $10?​

Answers

Answer:

40 quarters are in $10

Step-by-step explanation:

Answer:

40 quarters i think cause there's 4 quarters in a dollar and then 10 x 4 equals 40...

Step-by-step explanation:

Which of the following equations show the relationship between x and y in the table?

1. y= x+3
2. Y= 3x+1
3. Y=2x+2
4.y=4x

Answers

Answer:

y=2x+2

Step-by-step explanation:

you have to substitute x and y in the given equations and which one works

for y=x+3 , 4=1+3 true , 6=2+3 false

for y=3x+1, 4=3*1+3 false

for y=2x+2, 4= 2*1+2 true, 6= 2*2+2 true, 8= 2*3+2 true, 10=2*4+2 true

for y=4x, 4=4*1 true, 6= 4*2 false

Given the example below, determine the property displayed.

7+3=3+7

Answers

Answer:

commutative property of addition

Step-by-step explanation:

commutative property of addition

The commutative property of addition allows you to change the order of the numbers in an addition.

For example, 1 + 2 = 2 + 1

What is 1/4 : 3/4 :: 75 : =

Answers

Answer:

75 : 225

Step-by-step explanation:

[tex]\frac{\frac{1}{4} }{\frac{3}{4} } :\frac{75}{y}[/tex]

0.25 × y = 0.75 × 75

0.25y = 56.25

0.25y ÷ 0.25 = 56.25 ÷ 0.25

y = 225

Can someone help fast please!!!!

Answers

Answer:

yes it is

Step-by-step explanation:

Kim is thinking of a prime number.
It is in between a multiple of 11 and a factor of 48
What number is Kim thinking of?

Answers

Answer:

35

Step-by-step explanation:

While taking a hike 80% or 20 of the participants wore hiking boots. How many participants were on the hike?

Answers

20 beacuse you need hiking boots to hike

Answer:

25

Step-by-step explanation:

let x = # of participants on the hike

(.80)x = 20

x = 20/0.80 = 25

Employee A gets paid $150 weekly, plus $0.50 for each latte they sell. If he was paid $275,
how many lattes did he sell this week?

Answers

Answer:

550 lattes he sold this week

Step-by-step explanation:

$275÷$0.50= 550

Given that X≈2 is an approximate solution to x^2+2x-2=5, use the graph to find another approximate solution round your answer to the nearest integer. X≈ ___

Answers

The nearest integer that is a solution, gotten through graphing of the quadratic function x² + 2x - 2 = 5, is x = -4

How to find the graphical solution of the function

Quadratic equations when plotted on a graph follows a parabolic path.

To plot the functions there will be table of values that is used in making the graph. The table of values is solved as follows

x² + 2x - 2 = 5 rearranging the equation will result to x² + 2x - 7 = 0

For x = -20,  y = (-20)² + 2 * -20 - 7 = 353

For x = 0,  y = (0)² + 2 * 0 - 7 = -7

For x = 20,  y = (20)² + 2 * 20 - 7 = 433

x      y

-20  353

0      -7

20    433

The graph is plotted and attached. From the graph the solution is

x = -3.828, to the nearest integer = -4

Learn more about quadratic graphs at:

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What is the length of the longest diagonal

Answers

Answer:

pi  3.1415926535897932384626433832795

PLS HELP WILL GIVE BRAINLIEST
If a sprinkler waters 1 over 15 of a lawn in 1 over 3 hour, how much time will it take to water the entire lawn?

5 hours
15 hours
18 hours
45 hours

Answers

Answer:

5 hours

Step-by-step explanation:1 over 5 of an hour is 20 minutes. 20 minutes = 1 over 15 of lawn.

20 x 15 = 300

300 divided by 60 = 5 (hours)

CAN SOMEONE HELP PLEASE???

When a​ car's tire pressure is 30 pounds per square inch​ (psi), it averages mpg of gasoline. If the tire pressure is increased to 35​ psi, the car averages mpg of gasoline. Answer parts ​a) through ​c).

If someone drives an average of 21,000 mi per​ year, how many gallons of gasoline will he save in a year by increasing his tire pressure from 30 to 35​ psi?

If gasoline costs ​$2.00 per​ gallon, how much will he save in a​ year?

Assume that there are about 130 million cars in a country and that these changes are typical of each​ car, how many gallons of gasoline would be saved if all drivers increased their​ cars' tire​ pressure?

Answers

Answer:he will save 100 $

Step-by-step explanation:

Answer: $142

Step-by-step explanation: assume 20miles per gallon.

Then 0.05 gallon per mile.

35psi gives 30/35= 0.85 times the surface on the ground, gives square 0.85^2= 0.73 times more deflection so heatproduction a cycle or at same speed. This gives more fuelconsumption.

I once determined that when driving 50mph/80kmph constant, tires use 25% of the total fuel-consumption.

Higher speed same fuelconsumption by the tires, but more bij the higher speed. But to keep it simple only 50mph.

The fuelconsumption at 30 psi 0.05 gpm, 25% by the rolling resistance is 0.0125mpg. 35psi ,0.73 x0.0125=0.0091gpm.

The windforce stays the same 75% of total is 0.0375mpg+ 0.0091= 0.0466mpg,0.0466gpm/0.05= 93% used of fuel with 35psi then at 30 psi.

So 21000mpj x 0.05gpm= 1050 gallon

21000mpjx 0.466gpm= 979gallon.

Saving 1050-979= 71 gallonx $2= $142

Rounded here and there, and other speeds give other divisions, but to show the idea how to calculate it.

Also if 25% used is right is discussable.

The population growth of a certain city is given by the function P(t) = 0.9(1.5)^t, where t is time in years. Estimate lim P(t), if it exists.

Answers

Answer:

Infinity (∞)

Step-by-step explanation:

Graph the function and observe that the function P(t) increases without bound as x increases.

PLEASE HELP!!!!! PLEASE GIVE A EXPLANATION AND SHOW WORK!!!! THANK YOU!!!!

In 2018, the population will grow to over 700,000. The population of a city in 2010 was 450,000 and was growing at a rate of 5% per year. In what year will the population be over 700,000? Show all work.

Answers

Answer:

2019

Step-by-step explanation:

2010: 450,000

2011: (5% of 450,000) + 450,000 = 472,500

2012: (5% of 472,500) + 472,500 = 496,125

2013: (5% of 496,125) + 496,125 = 520,931.25

2014: (5% of 520,931.25) + 520,931.25 = 546,977.8125

2015: (5% of 546,977.8125) + 546,977.8125 = 574,326.703125

2015: (5% of 574,326.703125) + 574,326.703125 = 603,043.038281

2016: (5% of 603,043.038281) + 603,043.038281 = 633,195.190195

2017: (5% of 633,195.190195) + 633,195.190195 = 664,854.949705

2018: (5% of 664,854.949705) + 664,854.949705 = 698,097.69719

2019: (5% of 698,097.69719) + 698,097.69719 = 733,002.582049

Basically, take five percent of the population of the year and add it to the population of the previous year. This is the long way of doing it, but you get the population count for each year.

5.7935 rounded to the nearest thousand ​

Answers

Answer:

5.794

Step-by-step explanation:

The seven after the decimal point is the tenth digit, the nine is the hundredth, and the 3 is the thousandth place. Therefore, we look at our neighbor (the number next to the thousandth place) and if its 5 or more we round up, but if its 4 or less we keep it the same.

The equation below represents the amount of work required to complete a project, where x represents the number of hours each group member must contribute to the project. How many hours does each group member work on the project? x+45/4=4x 2 hours 4 hours 16 hours 3 hours

Answers

The number of hours does each group member work on the project is 4 hours. Therefore, the correct answer is option B.

What is an equation?

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

The given equation is x+45/4=4x.

The solution of an equation is the set of all values that, when substituted for unknowns, make an equation true.

4x-x=45/4

3x=45/4

x=15/4

x=3.75

x≈4 hours

Therefore, option B is the correct answer.

To learn more about an equation visit:

https://brainly.com/question/14686792.

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The dimensions of a rectangular Pyramid are shown in the diagram below what is the volume of the rectangular pyramid in cubic

Answers

Answer:

160 in³

Step-by-step explanation:

Volume of rectangular pyramid, V = (Length * width * height) / 3

Length = 10 in ; width = 8 in ; height = 6 in

V = (10 * 8 * 6) / 3

V = 160 in³

-69=7v-6

Please show your work, thank you.

Answers

-69=7v-6. Add 6 to both sides
-75=7v. Divide 7 to both sides
-75/7=v
Answer V= -75/7

Find the area of the shaded

NO DOCS,LINKS, FILES ETC
LOTS OF POINTS
WILL MARK BRAINLYEST ​

Answers

Answer:

40.5 m²

Step-by-step explanation:

Area of the shaded = area of the square - area of the triangle

Area of square = s²

s = 9 m

Area of square = 9² = 81 m²

Area of triangle = ½*b*h

b = 9 m

h = 9 m

Area of triangle = ½*9*9 = 40.5 m²

Area of the shaded = 81 - 40.5 = 40.5 m²

The table at the right shows data representing a polynomial function. Answer A, B, and C.

Answers

a) The degree of the polynomial is 5.

b) The second difference is -726        -126        -6        114         714

c) The difference when they are constant is 480.

What is a polynomial?

A polynomial is a mathematical equation that solely uses the operations addition, subtraction, multiplication, and non-negative integer exponentiation of variables. Variables are sometimes known as indeterminates in mathematics.

y values:      -999           -140          -7          0           1         116          945

1st difference        859           133          7           1          115         829

2nd difference               -726        -126        -6        114         714

3rd difference                           600      120      120       600

4th difference                                  -480      0         480

5th difference                                           480     480

The degree of a polynomial is the number of difference where it is constant.

The degree of the polynomial function is 5.

The constant is the 5th difference which is 480.

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