Mathematics High School

can anyone please help me with this? i need a step by step explanation please! very appreciated:)
y=5x-9
y=3x+7

Answers

Answer 1

Answer:

Step-by-step explanation:

x and y are variables. That means they represent numbers that are unknown. When we solve for x or y, we are trying to find what number the variable represents.

Y is a number that equals both 5x-9 and 3x+7. If it is a number, it can only have one value, so we can say that 5x-9 and 3x+7 have the same value.

In other words, 5x-9 = 3x+7.

Another way of thinking about this step is substitution. y=3x+7, so in the equation y=5x-9, we can replace the y with 3x+7. It will give 3x+7 = 5x-9.

In either case, we have this new equation

5x-9 = 3x+7.

From here it's just simple algebra- subtract 3x from each side

2x -9 = 7

and add 9 to each side

2x = 16

and divide each side by 2.

x = 8.

All these steps work because if two things equal each other, when you do the same thing to both of them (such as add 9), the new values will still equal each other.

Now that we know that x = 8, we can take one of the original equations

y=5x-9

and put 8 in for x.

y=5*(8) -9.

If x represents the value 8, we can obviously switch out x for 8.

Now simplify

y=40 -9

y = 31

Now we know that x = 8 and y = 31.

Answer 2

Answer:

x=8 and y=31

Let's solve your system by substitution.

y=5x−9;y=3x+7

Step: Solve y=5x−9for y:

y=5x−9

Step: Substitute5x−9foryiny=3x+7:

y=3x+7

5x−9=3x+7

5x−9+−3x=3x+7+−3x (Add -3x to both sides)

2x−9=7

2x−9+9=7+9(Add 9 to both sides)

2x=16

2x/2=16/2 (Divide both sides by 2)

x=8

Step: Substitute 8 for x in y=5x−9:

y=5x−9

y=(5)(8)−9

y=31 (Simplify both sides of the equation)

Answer:

x=8 and y=31

NOTE: Please give the brainly to the first answer

HOPE THIS HELPS <33333

-Silver

Related Questions

If yall help me with all the answers ill give you 32 points. Ik this is easy but I'm too lazy to do this. someone help me, please.

Answers

Answer:

100-both

75-5

565- 5

2815- 5

10050- both

57- 3

1365- 3

14- 2

81- 3

3850- 2

333- 9

1125- 9

448- 8

630- 9

5496- 8

114- 6

21,750- 6

3580- 4

2528- 4

944- 4

Step-by-step explanation:

To the nearest square inch, what is the shaded sector in the circle shown below?

Answers

Answer: 116 in2

Step-by-step explanation:

I did it

2/5x3/4 show your work if you get it right i will give u braniset. if u do for frre points i willl delete it

Answers

2x3
—— = 6/20 = 3/10
5x4

Answer:

2x3

—— = 6/20 = 3/10

5x4

Step-by-step explanation:

What’s 23y times 4x(simplify)

Answers

Answer:

92xy

Step-by-step explanation:

Multiplying 23 by 4 results in 92.

Then 23y times 4x = 92xy

find the mean and median​

Answers

Answer

Step-by-step explanation:

first order them from least to greatest

then keep eliminating one till u get one in the middle thats the median

to find mean u have to find advarge so u take highest and divide by lowest

Answer:

Mean: 522.16

Median: 427.3

Step-by-step explanation:

mean is the average and median is the middle value when you place them from the smallest to greatest

The numbers are 279.18, 271.11, 309.80, 363.45, 409.79, 444.81, 603.53, 695.46, 872.03, 972.42

If we add them all up then it would be 5221.58, then we need to divide it by 10 because there are 10 different sets of number

5221.58÷10=522.158 If we round it up it would be $522.16

Next, we need to put all the number in the order of smallest to biggest

271.11, 279.18, 309.90, 363.45, 409.79, 444.81, 603.53, 695.46, 872.03, 972.42

The number in between are 409.79 and 444.81

We need to find the average of these 2 number

(409.79+444.81)÷2=854.6÷2=427.3

(3 + 8i) + (7 -- 2i) - (6 - 5i)
AO 4+1
B.O4 + 117
c. 16 +1
D.O4 + 1143

Answers

Answer: (3 + 8i) + (7 -- 2i) - (6 - 5i) = 4 + 15i

_____________________________________________

Simplify the expression.

4 + 15i

_____________________________________________

I need everyone to know something! Don't let anyone ever push you down or call you worthless.  

You are worth everything and more! So stay strong, hold on, and live long!  

Most people don't hear this often. Your all loved, no matter what it feels like. So please, stay strong. If not for yourself then for me and everyone else who cares for you...

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A company paid $48 for 2 cases of printer paper./Each case contained 12 packages of paper./ Next month the company's office manager needs to order 180 packages of the same paper./ If the price per package does not change,/ what would be the total cost of next month's order?

Answers

Answer:

$360

Step-by-step explanation:

Calculation for what would be the total cost of next month's order

First step is to calculate how much they paid per the two cases of printer papers

Two cases of printer paper=$48 /2

Two cases of printer paper=$24 per case

Second step is to calculate the cost of each package of printer paper

Cost of each package of printer paper=$24/12 packages of paper

Cost of each package of printer paper=$2

Last step is to calculate the total cost of next month's order

Total cost=180 packages*$2

Total cost=$360

Therefore what would be the total cost of next month's order is $360

Use the slope formula to find the slope of the line that passes through the points.

Answers

It’s 4/5 because it’s y-y1/x-x1

Answer:its 4/5

Step-by-step explanation:

Somebody correct this please..

Answers

Answer:

the third option is correct

Step-by-step explanation:

[tex]x=1[/tex]

3/5 + 7/10 - 1/2.

7 minutes left!

Answers

Answer:

8/10 or 4/5 (simplified)

Step-by-step explanation:

3/5      >      6/10   (x2 by numerator and denominator to match with 7/10)

6/10 + 7/10 = 13/10

13/10 - 1/2      >      13/10 - 5/10 = 8/10

8/10 or 4/5 (simplified)

please please help which equation is equivalent to the formula below?? y= a(x-h)2 +k

Answers

y= a (x-h)^2 + k
y-k=9 (x-h)^2
a= y-k/(x-h)^2
Option A is the answer .

Answer:

a=y-k/(x-h)^2

Evaluate for f(-2).
f(x) = 8x-10

Answers

Answer: f(-2) = -26

Step-by-step explanation:

Substitute -2 in x, it would look like:

8(-2) - 10

-16 - 10

= -26

Can someone help plz

Answers

Answer:

See explanation

Step-by-step explanation:

x     f(x)

-2    -5.9375

-1     -5.75

0      -5

1       -2

2      10

x intercept : -5

y intercept : -6

what element is 1s22s22p63s23p63d104s1

Answers

Answer:

Copper

Step-by-step explanation:

Count the exponents and this tells you the proton amount (atomic number)

and electron count

This is the electron configuration

Answer: copper

Step-by-step explanation: 1s22s22p63s23p63d104s1 is the election configuraction

Simplify 5(6x+9)-3x+4

Answers

Answer:

27x+49

Step-by-step explanation:

1. Start by distributing the 5 to 6x+9. This means to multiply 6x and +9 by 5.

6x times 5 = 30x

5 x 9 = 45.

5(6x+9) simplifies to 30x+45

2. Rewrite the expression as 30x+45-3x+4

3. Combine like terms.

30x - 3x = 27x

45 + 4 = 49

27x+49

HELPPP PLEASE DUE SOON

Answers

Answer:

Step-by-step explanation:

Hi do you have desmos it more easier.

1.y=1

slope=1/2

Complete the missing value in the solution to the equation:

1 5y+10x=2x-y (1/2,

2 3y+2x=x+4 ( ,2/3)

3 1/2y+2=x+10 ( ,4)

Answers

Answer:

10

Step-by-step explanation:

PLS SOLVE THIS ILL GIVE BRAINILEST AND EVERYTHING

Answers

X^3 = 64
Answer: 4

X^2 = 64
Answer: +-8

data handling formula​

Answers

Answer:

what do you have to do or solve... it doesn't make sense what's got to happen

. 4/2y - 31 - 1 = 11

Answers

Answer:

the correct answer is

y = 42

hope this helped :)

the width of a rectangle is fifteen feet less than the length . if the area of the rectangle is 54 square feet , find the width .​
a. 3 ft
b. 6ft
c. 9 ft
d. 18 ft

Answers

Answer:

A

Step-by-step explanation:

A. 3 x 18 = 54

B. 6 x 21 = 126

C. 9 x 24 = 144

D. 18 x 33 = 594


The Williams family goes shopping, and spent $95.00. The sales tax for the clothing is 8%, and they also have a coupon for 20% off. What is the
total cost of the shopping trip?

Answers

$82.08 - 20% off drops it down to $76 and then the tax is 8%

Question 7
10 pts
Find the length of the missing side. Round to the nearest tenth (one decimal place).
7
loo

Answers

Answer:

its 93 -_-

Step-by-step explanation:

If its wrong sorry

AHH PLS HELP

What are the X and Y intercepts for a line with the standard form equation of 3X + 7Y = 21

Answers

The x-intercept is (7,0) and the y-intercept is (0,3).

Find the x-intercept of the line: 10x-14y=2?​

Answers

Answer:

y=2

Step-by-step explanation:

Do you have the graph? pls kindly snap it

Please help me im very depressed and im struggling a lot on my math and i really need some answers

Which number sentence is true?

Answers

Answer:

A 8.565 < l-13.23l

Step-by-step explanation:

Because the brackets makes the -13.23 positive

C is true while the other choices are false

What is the relationship between the base angles of an isosceles triangle?

Answers

If the 2 base angles are congruent then the two opposite sides are congruent

If I have a 74 in geometry, and I have an assignment worth 100 points then I get a zero, what would my grade be?

Answers

................

Step-by-step explanation:

it would at LEAST be like around 20-30 because a 0 can drop something FAST

Hello does anyone know how to figure this out? - 3(4 + x) = x + 6

Answers

Answer:

-4.5

Step-by-step explanation:

-12-3x=x+6

-4x=18

x=-4.5

Answer:

-4.5=x

Step-by-step explanation:

First you would distribute the -3 to the 4 and x inside the parentheses

It would be -3 x 4= -12

Then  -3 x X= -3x

So your equation would now be -12+ -3x = x + 6

Now you add  3x to the -3x to cancel it out and then add it to the x

So your equation now looks like -12=4x +6

Then you subtract 6 from the 6 to cancel it out and add it to the -12

Now your equation looks like -18=4x

Then you divide 4 from the 4x to cancel it out and then divide 4 from the -18

Finally you have  -4.5=x

I'm unsure if this is correct but hopefully this helps :)

Identify the slope and p-intercept of the
equation 2x + 5y = 20

Answers

Answer:

slope: -2/5

y-intercept: (0,4)

Step-by-step explanation:

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