use the elimination method to solve the system of equations. choose the correct ordered pair. 7x+3y=30 -2x+3y=3

Answers

Answer 1

Answer:

x = 3, y = 3

Step-by-step explanation:

Elimination method to find x:

  (7x + 3y = 30) * -1      ===>                              -7x - 3y = -30

                                                                          -2x + 3y = 3                    

  add two equations to eliminate y             ______________

                                                                                 -9x = -27     ===>   x = 3

substitution to find y:  

  -2x + 3y = 3

  -2(3) + 3y = 3

  -6 + 3y = 3

  3y = 9

    y = 3

Elimination method to find y:

  (7x + 3y = 30) * 2         ===>                           14x + 6y = 60

  (-2x + 3y = 3)  * 7         ===>                         -14x + 21y = 21

  add two equations to eliminate x             ______________

                                                                              27y = 81      ===>   y = 3


Related Questions

which inequality is true?

Answers

Answer:

the answer is B

Step-by-step explanation:

HELP ASAP RN 10 POINTS AND BRAINLIEST TO WHOEVER DOES IT CORECTLY The cost to rent a bicycle at Freewheels is $10 plus an hourly rate for each hour the bicycle is rented. The graph represents the linear relationship between the cost, in dollars, to rent a bicycle and the
number of hours rented.

Based on the graph, which statement is true?
Freewheels charges a $4 initial fee and $10 per hour.
Freewheels charges a $10 initial fee and $4 per hour.
Freewheels charges an $8 initial fee and $42 per hour.
Freewheels charges a $42 initial fee and $8 per hour.

Answers

Answer:

Freewheels charges a $10 initial fee and $4 per hour.

that is the correct answer! hope this helped!  

The coordinates from the graph.

(0, 10) and the rate of change is 4.

Freewheels charge a $10 initial fee and $4 per hour.

Option B is the correct answer.

What are coordinates in a graph?

The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.

The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.

We have,

From the graph, we have the following coordinates.

(0, 10)

(1, 14)

(2, 18)

(3, 22)

(4, 26)

(5, 30)

(6, 34)

Now,

The coordinates (0, 10) mean that there is an initial fee of $10.

Rate of change between two points.

= (18 - 14) / (2 - 1)

= 4/1

= 4

This means there is a charge of $4 per hour.

From the graph, we see that,

Freewheels charge a $10 initial fee and $4 per hour.

Option B is the correct answer.

Thus,

The coordinates from the graph.

(0, 10) and the rate of change is 4.

Freewheels charge a $10 initial fee and $4 per hour.

Option B is the correct answer.

Learn more about coordinates here:

https://brainly.com/question/13118993

#SPJ2

A party planner estimates a party will cost $200 plus $8 for each person attending. What is the y-intercept of the graph of the linear function representing the total cost of the party?

Answers

Answer:

The y intercept is 200

Step-by-step explanation:

Given

Base Cost = 200

Per person =8

Required

Determine the y intercept

First, we need to determine the equation.

The total amount (y) for x persons can be calculated using:

y = Base Cost + Amount per person * x.

This gives

y = 200 + 8 * x

y = 200 + 8x

The general expression of a linear equation is:

y = mx + b

Where b = y intercept

By comparison,

b = 200

Hence, the y intercept is 200

Solve for xxx.
Your answer must be simplified.
x/-6 ≥ -20

Answers

[tex] \mathsf{Hey \: there}[/tex]

[tex] \mathsf{\dfrac{x}{ - 6} \geq - 20}[/tex]

We can substitute the greater or equal to sign as a "equal" sign (for now)

[tex] \mathsf{\dfrac{x}{ - 6} = - 20}[/tex]

Multiply both of your sides by ⬇

[tex] \mathsf{ \dfrac{6}{-1}}[/tex]

Like

[tex] \frac{6}{-1} \times \frac{ -1}{6} \mathsf{x} = \frac{6}{-1} \times - 20[/tex]

[tex] \mathsf{Cancel \: out: \dfrac{6}{ -1} \times \dfrac{ - 1}{6} \: because \: it \: you \: 1 }[/tex]

[tex] \mathsf{Keep:{\dfrac{6}{-1} \times \: -20} \: because \: it \: helps \: solve \: for \: your \: equation}[/tex]

[tex] \mathsf{x = 120}[/tex]

We do the same for your equation but a tad bit different!

[tex] \boxed{ \mathsf{your \: answer: \boxed{ \mathsf{ \huge\bf{x \leq120}}}}} \checkmark[/tex]

- ITS AN OPENED CIRCLE SHADED TO THE LEFT GOOD LUCK ON YOUR ASSIGNMENT AND ENJOY YOUR DAY!

~

[tex] \dfrac{\frak{LoveYourselfFirst}}{:)}[/tex]

Answer:

hehe <120 i thinkkkkkkkkk

Step-by-step explanation:

Jenny cut a wire into 4 equal pieces. The wire was originally 7.92 meters long. How long is each piece?

Answers

Answer:

1.98 meters

Step-by-step explanation:

divide 7.92 by 4

(7.92)/4

1.98

15% of the students in the class
did not complete their homework. If there
are 20 students in the class, how many didn't do their homework?

Answers

Answer:

3

Step-by-step explanation:

15% of 20 Is 3.

Mai has 4 CDs that she is going to give away. She lets her best friend choose 3 of the 4 CDs. How many different groups of 3 CDs are possible?

Answers

You can make 24 different groups of cds

are the triangles congruent ?

Answers

Answer:

yes its sss

Step-by-step explanation:

Answer:

SSS BECAUSE THE TRIANGLE IS GOING UP AND DOWN SO 5% of it so SSS

Find the point-slope equation of the line contains (-2,-3) and having slope m=4

Answers

Answer:

y + 3 = 4 x (x + 2)

Step-by-step explanation:

point slope formula is y-y1 = m(x-x1)

slope intercept form is y = 4x + 5

                                       y=mx +b

                                           m=4

For which inequality is x = 5 a solution ?

Answers

Answer:

C

Step-by-step explanation:

because x<2 is ... -1,0,1

x>9 is 100,11,12...

but x<18 is 17,16.. 6,5,4

x>42 is more than 42 so 43,44,45...

what is 52.03 squared?

Answers

Answer:

It is 2707.1209

Step-by-step explanation:

What is the greatest place value in this number, 189?​

Answers

Answer:

the 1 cause it's a 100

Step-by-step explanation:

100 + 80 + 9

I need help with this

Answers

Answer:

120 students

Step-by-step explanation:

so divide 300 by 10 = 30

then multiply it by 4 = 120

Which shows the best use of associative and commutative properties to make simplifying 3/4 - 5 + 9 -2/4 + 2 easier?

Answers

Answer:

(-5) + 9 + 2 + 3/4 + (-2/4)

Find the prime factorization of 32. Write in exponential form.

A. 2 × 2 × 2 × 2 × 2


B. 26


C. 2 × 2 × 2 × 2


D. 25

Answers

The answer is A. 2*2*2*2*2

Answer:

find the prime factorization of 32. write in exponential form.

option A is correct

Use the distributive property to remove the parentheses. Simplify your answer as much as possible.
1/2(4w-5)
please help i need answers asap​

Answers

Answer:

2w - 2 1/2

Step-by-step explanation:

you need to multiply the faction by each one of the numbers. multiplying them by 1/2 is going to be the same was dividing them by 2

4w (1/2) - 5 (1/2)

2w - 2 1/2

hope this helps!

The Tigers, a football team, must gain 10 yards in the next four plays to keep possession of the ball. The Tigers lose 24 yards, gain 4 yards, and lose 10 yards. How many yards do they need to keep possession?
40
20
-20
-8

Answers

Answer:

B. The must gain 20 yards to keep possession

Step-by-step explanation:

Let the number of yards gained be positive

Let the number of yards lost be negative

Since the total that must be gained in the next four games is 10, hence the total is +10

If The Tigers lose 24 yards, gain 4 yards, and lose 10 yards in the first three rounds with x being the number of yards in the fourth round, this is expressed as;

-24 + 4 - 10 + x = 10

-20 - 10 + x = 10

-30 + x = -10

x = -10 + 30

x = 20

Hence they need 20 yards in the last round to keep possession

Find f(-5) If f(x) = lx+ 1l.

Answers

the answer would be four

In a recent year, 0.57 of those registered to vote in the United States voted in an election.

Write 0.57 as a percent.

Answers

Answer:

57%? I think.

Step-by-step explanation:

Answer: 57% iḿ sure.

Step-by-step explanation:

Which graph shows a set of ordered pairs that represents a function?

Answers

Answer:

2nd Graph

General Formulas and Concepts:

Algebra I

Vertical Line Test - A function's x-values must have only 1 corresponding y-value. If the function fails this test, it is not a function.

Step-by-step explanation:

When we apply the Vertical Line Test to the 1st graph, it does not pass (x = 1). Therefore, the 1st graph is not a function.

When we apply the Vertical Line Test to the 2nd graph, it does pass. Therefore, the 2nd graph is a function.

When we apply the Vertical Line Test to the 3rd graph, it does not pass (x = 2). Therefore, the 1st graph is not a function.

When we apply the Vertical Line Test to the 4th graph, it does not pass (x = -3). Therefore, the 4th graph is not a function.

Answer:

2nd graph is correct

Step-by-step explanation:

How do you do this question?

Answers

Answer:

z = -ln│5eᵗ + C│

Step-by-step explanation:

dz/dt + 5eᵗ⁺ᶻ = 0

dz/dt = -5eᵗ⁺ᶻ

dz/dt = -5eᵗeᶻ

-e⁻ᶻ dz = 5eᵗ dt

e⁻ᶻ = 5eᵗ + C

-z = ln│5eᵗ + C│

z = -ln│5eᵗ + C│

choose the correct solution and graph
z+9≤6

Answers

Answer:

z ≤ -3

Step-by-step explanation:

z + 9 ≤ 6

z ≤ -3

There are 105 members in a marching band. They are traveling on buses. Each bus holds 35 members. How many buses are needed to carry the band members?

Answers

Answer:

3 buses i'm pretty sure :))

NEED HELP ASSSAAPPP
Choose the correct slope of the line that passes through the points (-4, 8) and (-8,8).
O slope = undefined
O slope = -1
O slope = 1
O slope = 0

Answers

Answer:

0

Step-by-step explanation:

Two people are driving to work at different constant speeds. The graph below shows the distance traveled over time by driver 1.


The table (no graph included just the table) below shows the distance traveled over time by driver 2.


What is the difference between the speeds of the two drivers in mph?

Answers

Answer:

5 mph

Step-by-sep explanation:

To find of out the difference between the speed of the two drivers in miles per hour (not in miles per minute), first, calculate the unit rate or speed of driver 1 using the graph, and driver 2 using the table given.

Unit rate/speed = distance travelled/time = y/x.

Speed of Driver 1/unit rate:

The graph shows 1.5 miles (y) is travelled in 2 minutes (x).

Convert the 2 minutes to hour, you will have:

[tex] \frac{2}{60} = \frac{1}{30} hr [/tex]

Speed in mph = [tex] \frac{y}{x} = \frac{1.5}{\frac{1}{30}} = 1.5*\frac{30}{1} = 45 [/tex]

Speed of Driver 1 in mph = 45 mph

Speed of Driver 2/unit rate:

The table shows 2.5 miles (y) is travelled in 3 minutes (x).

Convert the 3 minutes to hour, you will have:

[tex] \frac{3}{60} = \frac{1}{20} hr [/tex]

Speed in mph = [tex] \frac{y}{x} = \frac{2.5}{\frac{1}{20}} = 2.5*\frac{20}{1} = 50 [/tex]

Speed of Driver 2 in mph = 50 mph

Difference between the speed of the two drivers = 50 - 45 = 5 mph

I WILL GIVE BRAINLIEST AND POINTS PLEASE GIVE ME THE ANSWER OF THIS FAST PLEASE!!!!!

Answers

The answer is c


That’s the answer

Which graph is this?

Answers

It is a Parallel graph
A parallel graph I think

I need the correct answer not the wrong answer or the I don’t know answer CORRECT..

Answers

Answer:

6 un

Step-by-step explanation:

2 22= 6

Answer:

1

Step-by-step explanation:

2devided

by 2 =1

Which expression is equivalent to 4 – (-7)
a 7+ 4
b 4 - 7
c-7 - 4
d -4 + 7

Answers

Answer:

A. 7 +4

Step-by-step explanation:

4 -( - 7 )

4 + 7

7 + 4

Answer:

a

Step-by-step explanation:

4 + 7 = 11. subtracting a negative number is the same as adding

describe the prime factorization of 180

Answers

Answer:

5 x 2 x 2 x 3 x 3 = 180

Step-by-step explanation:

HOPE THIS HELPS’

PLZZ MARK BRAINLIEST

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