Mathematics High School

What is the value of y when x = 6?

-3x + 9y = 18

Answers

Answer 1

Answer:

y = 6

Step-by-step explanation:

-3x + 9y = 18

-3(6) +6y = 18

-18 +6y = 18

Add 18 to each side

-18+18 +6y =18+18

6y = 36

Divide each side by 6

6y/6 = 36/6

y = 6

Related Questions

y=-3x + 6
y = 9
What is the solution to the systems of equations

Answers

Answer:

-1,9

Step-by-step explanation:

You use the equal values method to combine the two equations

-3x+6=9

then subtract 6 on both sides of the equal sign

      nine minus six is 3

-3x=3

divide negative three on both sides to isolate the x value

to get....

x=-1

then plug the x value back in to find the y value

(you can plug in to one of them but I would plug into both of them just for double checking) ALWAYS CHECK YOUR WORK

3+6 is 9

9=9 check!

Answer:C -(-1,9)

Step-by-step explanation:

1. £500 is deposited in a bank paying 2% simple interest per annum. How much interest will have been paid after 2 years?
2. £500 is deposited in a bank paying 1% simple interest per annum. How much interest will have been paid after 5 years?
3. £1500 is deposited in a bank paying 6.25% simple interest per annum. How much interest will have been paid after 3 years?
4.£3600 is deposited in a bank paying 4% simple interest per annum. How much interest will have been paid after 4 years?
5.£4300 is deposited in a bank paying 5.75% simple interest per annum. How much interest will have been paid after 6 years?
6.£4000 is deposited in a bank paying 9.5% simple interest per annum. How much interest will have been paid after 8 years?
7.£3600 is deposited in a bank paying 14.75% simple interest per annum. How much interest will have been paid after 14 years?

Answers

1. 500 x 0.02 x 2 = £20
2. 500 x 0.01 x 5 = £25
3. 1500 x 0.0625 x 3 = £281.25
4. 3600 x 0.04 x 4 = £576
5. 4300 x 0.0575 x 6 = £1483.50
6. 4000 x 0.095 x 8 = £3040
7. 3600 x 0.1475 x 14 = £7434

What value of b with cause the system to have an infinite number of solutions?
A.
B.
C.
or
D.

Answers

Step-by-step explanation:

-3x+3x-(b÷2)=-3

0-(b÷2)=-3

-(b÷2)=-3

b=-2×-3=+6

=> b=6

HELP ME!!! Find the y intercept of the line y=2x-11

Answers

Answer:

It would intercept the y-axis at y = -11

Step-by-step explanation:

Here is the work

Answer:

Step-by-step explanation:

the y interception is -11

Y=mx+b formula the b is for the y intercept and the m is the slope.

Please help! Correct answers only!

There is a raffle with 200 tickets. One ticket will win a $550 prize, one ticket will win a $510 prize, one ticket will win a $280 prize, and the rest will win nothing. If you have a ticket, what is the expected payoff?

Answers

Answer:

" Expected Payoff " = $ 6.70

Step-by-step explanation:

Consider the steps below;

[tex]Probability of Winning the 550 Dollar Prize - 1 / 200,\\Probability * Money Won = " Expected Payoff " For The 550 Dollar Prize,\\\\1 / 200 * 550,\\" Expected Payoff " - 2.75 Dollars,\\\\Probability of Winning the 510 Dollar Prize - 1 / 200,\\\\1 / 200 * 510,\\" Expected Payoff " - 2.55 Dollars,\\\\Probability of Winning the 280 Dollar Prize - 1 / 200,\\\\1 / 200 * 280,\\" Expected Payoff " - 1.4 Dollars,\\\\[/tex]

[tex]Conclusion ; Expected Payoff = 6.70 Dollars[/tex]

Find the volume of prism
Pls!! Show how you got the volume pls

Answers

The answer is 1575. I can tell you step by step how to get it if you want.
First workout volume of the cuboid part then workout the volume of the prism part and then add your answers together to give you a volume of the full shape.
Hope this helps ya

If a and b must be positive integers, what is the largest integer n such that 13a + 18b = n has no solutions?

Answers

Answer:

Any integer that is not integer multiple of 234 is not a solution.

Step-by-step explanation:

We are required to find the largest integer n such that 13a + 18b = n has no solution, where a and b are integers.

13a + 18b = n

For a = 1, b = 0

n = 13

For a = 0, b = 1

n = 18

So, for the solution sets (1, 0), (0, 1), n will always have a solutions.

Consider n = 13 × 18 = 234

This means that any integer that is not integer multiple of 234 is not a solution.

3х + y = 8
x - Зу = 11

Answers

Answer:

y = 8-3x and y = -11/3 + x/3

For the first equation you have to subtract 3x from both sides of the equation. for the second equation you have to move all terms that doesn't contain y to the right side and solve

When cut into 16 equal slices, each slice is 1/16 of the pizza. Express how much of the pizza 8 of these slices would be in decimal form.

Answers

Answer:

0.5

Step-by-step explanation:

If one part = 1/17

Then, 8 parts = 1/16 x 8 = 1/2

1/2/as a decimal is 0.5

Hope this helps

The length of a spring varies directly with the mass of an object that is attached to it. When a 30-gram object is attached the
spring stretches 9 centimeters. Which equation relates the mass of the object, m, and the length of the spring, s?​

Answers

Answer:

[tex]s = \frac{3}{10}m[/tex]

I hope this helps!

Answer: s=3/10m

Step-by-step explanation:

I took the math test in Edgenuity.

Hope this helps!

y varies directly as x and inversely as z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8.

Answers

Answer:

y= 201/40

Step-by-step explanation:

y=k (x÷z)

5 = (3÷4)k

cross multiply

20=3k

k= 6.7 or 67÷10

y = 6.7 (x÷z) the law

y = (6÷8) × 6.7

y = 0.75 ×6.7

y= 5.025 or 201÷40

Consider the function represented by 9x+3y= 12 with x as the independent variable. How can this function be written using
function notation?

f(y) = -1/3y+4/3
f(x) = -3x+4
f(x) = -1/3x + 4/3
f(y) = -3y+4​

Answers

You only have to write the expression for y and change y by f(x). This is:

9x + 3y =12
3y = -9x +12
y = -3x + 4
f(x)= -3x+4

Then, the answer is B

The graph of an absolute value function y=a|x| includes the points (1,6) and (-1,6)

Answers

Answer: y=6|x|

Step-by-step explanation:

I attached the graph too!

Simplify (5 + 1)^2- (11 +32) divided by 4

Answers

Answer:

-7/4

Step-by-step explanation:

((5 + 1)^2- (11 +32))/ 4=(36-43)/4= -7/4

Answer:

31

Step-by-step explanation:

Mr Hassan gave his year 7 class a test on Friday. the highest possible mark for the test was 10.​

Answers

Answer:

To solve this question, we just need to observe the given graph.

(A) How many pupils scored more than 8 in the test?

Each little square is equivalent to 0.5 units, so there are 5 students who fot more than 8. Specifically, 1 got 8 points and 4 students got 10.

(B) How many pupils are there in Mr. Hassan's Year 7 class?

There are 33 pupils in total, remember that each little square is equivalent to 0.5 units.

(C) What assumption have you made in answering part b)?

The assumption was that the majority of pupils scored less than 8.

A multi level parking lot has 6 levels and there are total of 1,327 parking spots. There are 162 parking spots on the first level. The rest of the parking spots are distributed equally on the other 5 levels. How many parking spots are there on the top level? *

Answers

Answer:

233 parking spots

Step-by-step explanation:

1327 - 162 = 1165

1165 ÷ 5 = 233

Which is a correct first step in solving 5 - 2x < 8x - 3?
5 < 6x-3
3x < 8x-3
5 < 10x - 3
2 - 2x < 8x

Answers

Answer:

5 < 10x-3

Step-by-step explanation:

5 - 2x < 8x - 3

Add 2x to each side

5 - 2x+2x < 8x - 3+2x

5 < 10x-3

Answer:

The answer is C.

Step-by-step explanation:

Trust me, I got you.

what is the slope of the linear relationship shown in this table?

Answers

Answer:

-1/2

Step-by-step explanation:

Slope is change in x over change in y

so..

2-(-4)

over

-1-11

so...

-6/12 or -1/2

If < D is a right angle and < E is a right angle, and you said that < D is congruent to < E, the reason would be ____. Select one: a. Supplementary Angles are congruent b. All right angles are congruent c. Complementary Angles are congruent

Answers

Answer:

(B)All right angles are congruent

Step-by-step explanation:

Given that:

[tex]\angle D$ is a right angle, and\\\angle E$ is a right angle\\\\\angle D=90^\circ\\\angle E=90^\circ\\$Therefore: \angle D \cong \angle E[/tex]

The reason for this congruency is that both are right angles and in fact, all right angles are congruent.

Identify the scale factor.

Photograph: height 3 inches

Painting: height 24 inches

Answers

Quick answer 3/24 or 1/8

Profit is the difference between revenue and cost. The revenue, in dollars, of a company that makes skateboards can be modeled by the polynomial 2x3 + 30x – 130. The cost, in dollars, of producing the skateboards can be modeled by 2x3 – 3x – 520. The variable x represents the number of skateboards sold. What expression represents the profit?

A. 27x – 650
B. 27x + 390
C. 33x – 650
D. 33x + 390

Answers

Answer:

We need to subtract both equations. 2x3+30x-130-2x3+3x+520

that gives

30x-130+3x + 520

33x+390

D is answer

Answer:

D. 33x + 390

Step-by-step explanation:

Profit is the difference between revenue and cost so subtract the given polynomials:

2x³ + 30x – 130 - (2x³ – 3x – 520) = 2x³ + 30x – 130 -2x³+3x+520

combine like terms: 33x +390

Can anyone help me. Please

Answers

Answer:

how can I help?

Step-by-step explanation:

with what?

I have been trying to find this for awhil: Find the other endpoint of the line segment with the given endpoint and midpoint.
Endpoint 1: (0,2) Midpoint: (4,5)

Answers

Answer:

8.8

Step-by-step explanation:

4.5-0.2=4.3

The difference is 4.3 add 4.3 to 4.5=8.8

Plzzz help !!
The sugar sweet company will choose two companies to transport its sugar to market. The first company charges $6990 to rent truck and plus an additional fee of $175.75 for each ton of sugar. The second company charges $7500 to rent trucks plus an additional fee of $150.25 for each ton. For what amount of sugar do the companies charge the same and what is the cost when the two companies charge the same ?

Answers

Answer: 14 tons and $3,860.50

Step-by-step explanation:

The table shows the scores of a biology test in Mrs. Smiths class . Find the mean of the data without Kim’s score.
A- 80
B- 87.2
C- 90
D- 84.5

Answers

To find the mean, you add up all the values and divide by how many there is. So... excluding Kim’s score there are 7 students scores. Now add all the scores up which will give you 611. 611/7 = 87.286

That will give you B

Hope this helps! :)

Answer:

87.2

Step-by-step explanation:

90+93+87+83+86+90+82=611

611/7=87.29

answer is b

Solve this equation 3x-1/5-2/9x=124/5 , simply by combining like terms, Which terms can be combined? Isolate the variable term by adding this value to both sides of the equation?

Answers

Answer:

x=9

Step-by-step explanation:

x in (-oo:+oo)

3*x-((2/9)*x)-(1/5) = 124/5 // - 124/5

3*x-((2/9)*x)-(1/5)-(124/5) = 0

3*x+(-2/9)*x-1/5-124/5 = 0

25/9*x-25 = 0 // + 25

25/9*x = 25 // : 25/9

x = 25/25/9

x = 9

Answer:

1/5

Step-by-step explanation:

i got it right

Can someone help with this question?

Answers

Answer:

1. 5

2. -3

3. -4

4.  0

Step-by-step explanation:

Substitute the value of x in the equation with each of the x's given in the table.

Example:

When x = -1

y = -1^2 - 4 x -1 = 1 - 4 = -3

When x = 4

y = 4^2 - 4 x 4 = 16 - 16 = 0

Please add brainiest

THIS QUESTION GOT ME STRESSIN HELPPP A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is the number of 3-point questions and y is the number of 5-point questions, the system shown represents this situation. x + y = 24 3x + 5y = 100 What does the solution of this system indicate about the questions on the test? The test contains 4 three-point questions and 20 five-point questions. The test contains 10 three-point questions and 14 five-point questions. The test contains 14 three-point questions and 10 five-point questions. The test contains 20 three-point questions and 8 five-point questions.

Answers

Answer:

14 and 10

Step-by-step explanation:

14x5=70

10x3=30

100=70+30

There are 5,426 people seated at tables. Each table seats 8 people.
How many tables are full?
How many people are sitting at a table that is not full?
How many tables are needed for all 5,426 people?​

Answers

Answer:

678

2

679

Step-by-step explanation:

Number of people: 5426

Capacity of table: 8

How many tables are full?

Number of full tables= 5426/8= 678.25 so full part is 678

How many people are sitting at a table that is not full?

0.25 table= 8*0.25= 2 people are sitting at a table that is not full

or

5426 - 678*8= 2 people

How many tables are needed for all 5,426 people?​

678+1= 679 tables

Which of the following is an equivalent equation to find w

Answers

[tex]answer \\ w = \frac{ {8x}^{2} - 2y }{y} \\ hope \: it \: helps \\ good \: luck \: on \: your \: assignment[/tex]

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