what is the value of the expression x-3y when x = 6 and y = 12

Answers

Answer 1

Answer:

-30

Step-by-step explanation:

Plug in the values of x and y: 6 - 3(12)3(12) = 3 × 12 = 36Plug 36 in: 6 - 366 - 36 = -30

I hope this helps!


Related Questions

Which linear equation has a slope of 3 and a y-intercept of -2?
y = 3x + 2
y=3x-2
y=-2x + 3
y = -2x - 3

Answers

Answer:

y=3x-2

Step-by-step explanation:

3 is the coefficient of x (slope)

-2 comes after (y-int)

linear equation y = 3x-2 has a slope of 3 and a y-intercept of -2.

What is the Slope of a line?

A line's slope can be determined by looking at its slope. The slope is determined mathematically as "increase over run" (change in y divided by change in x). There are several ways to find the slope, including standard form, slope-intercept form, and point-intercept form.

Given, A linear equation that has a slope of 3 and a  y-intercept of -2.

Y-intercept of -2 means at x = 0 y would be -2

The slope-intercept form of a line is

y = mx + c

where m = slope

c = constant

Substituting the values in the given equation

-2 = 0 * 3 + c

c = -2

thus, the equation of the line,

y = 3x -2

therefore, The y-intercept of the linear equation y = 3x-2 is -2, and its slope is 3.

Learn more bout slope here:

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Using the following graph, determine the slope of the line,


The slope of the line is

Answers

Answer:

-2

Step-by-step explanation:

Just choose any two points and calculate the slope. The way to calculate the slope between two points (x1, y1) and (x2, y2) is (y2-y1)/(x2-x1)

Laila reads 36 pages in 4 hours which expression can be used to find the number of pages she reads per hour
A.
[tex] \frac{36hours}{4pages} [/tex]
B.
[tex] \frac{4pages}{36hours} [/tex]
C.
[tex] \frac{4hours}{36pages} [/tex]
D.
[tex] \frac{36pages}{4hours} [/tex]

Answers

Answer:

D

Step-by-step explanation:

 36 pages divided by 4

Help please! The problem is in the photo.

Answers

Answer:

f(-3) = 7

Step-by-step explanation:

For these types of questions, you need to replace the x's in the equation with whatever is inside f(x)

So if its f(5) you would sub 5 into where all the x's are

what is the answer a b or c

Answers

Answer:

A

Step-by-step explanation:

I think

Answer:

66 tens

Step-by-step explanation:

66 hundreds is 6600, and if you divide it by 10, you get 660, or 66 tens.

10) You and your friends order a meal for $116.29. How much
tip should you leave if you want to leave a 12% tip?
11) Originally priced at $19.59, a video game was found on a
62% off rack. What is the sale price of the video game?
12) A CD is marked with a sale sticker saying it is 56% off. The
original price is $10.17. What is the sale price?

Answers

10) 13.95$ tip, 11) the video game is now 7.45$

lev buys a drink of $3.05 and a slice of a pizza for $5.40 he now has $12.37 let how much money did teddy have to begin with

Answers

Answer:

12.37 + 5.40 + 3.05 = $20.82

What is the distance between -3 and 12?

Answers

Answer:

-15

Step-by-step explanation:

The required solution is 15.

It is required to find the solution.

What is arithmetic?

Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.

Given:

By the distance formula we get,

Distance between -3 and 12 is

=12-(-3)

=15

Therefore, the required solution is 15.

Learn more details about arithmetic here:

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If -2x -4 = -4x + 3, then does x = 3

Answers

Answer:

No it doesn't.

Step-by-step explanation:

Which of these ordered pairs is a solution of 3x−y=12? Choose all that apply.

Answers

Answer:

(0,-12)

Step-by-step explanation:

so you can get a app to graph it or graph it your self but that is the answer

Can someone explain to me adding and subtracting mixed numbers

Answers

Answer:

1.Find the Least Common Denominator (LCD)

2.Find the equivalent fractions.

3.Add or subtract the fractions and add or subtract the whole numbers.

4.Write your answer in the lowest terms.

Step-by-step explanation:

Step-by-step explanation:

So first, you turn the mixed numbers into improper fractions. Then you change the denominators to the same number. Finally, you add or subtract.

Example:

4 1/5- 2 1/2= 21/5- 5/2=42/10-25/10=17/10=1 7/10

Is x−1 a factor of 3x3−5x2−2?

Answers

Answer:

Yes

Step-by-step explanation:

According to google the anser is yes.

Camden paid $11.48 for sliced cheese at the deli counter. The cheese cost $3.28 per pound. How much cheese did Camden buy? *

Answers

Answer:

he bought 3.5 pounds because 3.28 times 3.5 equals the cost

Step-by-step explanation:

3.5 cause i did the math lol*^

The figure shows a right triangle next to a square.
What is the total area of the shape they make?

Answers

Answer:

Step-by-step explanation:

By using the Formula:

Areatriangle=10*5/2=25

Areasquare=5*5=25

Total Area is: 25+25=50

It will be nice if you give me brainliest.Good luck!

Answer:

50cm²

Step-by-step explanation:

Square- length x breadth

           =5cmx 5cm

           =25cm²

Triangle- ¹/₂ x base x perpendicular height

            = ¹/₂x 5cm x 10cm

            =25cm²

Square-   25cm²

Triangle-+25cm²

total area- 50 cm²

I hope it helps

Thank U

Math is hard please help, and explain i need to learn this.

Answers

Answer:

c

Step-by-step explanation:

Answer:

C is the answer

Step-by-step explanation:

lin makes sparkling orange juice by mixing 3 liters of orange juice with 4 liters of soda water. Noah makes sparkling orange juice by mixing 4 liters of orange juice with 5 liters of soda water. How do the two mixtures compare in taste explain your reasoning

Answers

Answer:

Step-by-step explanation:

Lin makes sparkling OJ using the ratio

3:4. Meaning 3L orange juice for every 4L sparkling water.

Noah makes sparkling OJ using the ratio 4:5. Meaning 4L orange juice for 5L sparkling water.

If we said that they both used 12L of orange juice,

Lin would have to use 16L of sparkling water

Noah would have to use 15L of sparkling water

So for the same 12L of orange juice, Lin uses more sparkling water.

Therefore her sparkling OJ would be more diluted (less orange flavour since you added more water) and more bubbly than Noah's.

Walter is making a 300-mile trip from Wichita Falls, Texas to Austin, Texas. After the first 120 miles, he continues driving at 65 mph.



If the equation 120+65x=300 is used to describe this situation, what does the " x " represent?

Answers

Answer:

distance left

Step-by-step explanation:

Find the y intercept
x-3y = 12

Help plz

Answers

Answer:

15

Step-by-step explanation:

Because 15 -3 will give you 12

Answer:

the y intercept is -4 or (0,4)

Step-by-step explanation:

To find the y intercept you have to make x zero, and vice versa. So:

0-3y = 12

-3y = 12

y = 12/-3

y = -4

the y intercept is -4 or (0,4)

Four more than one-third x

Answers

Answer:

four more than 1/3 would be 1 and 2/3

Step-by-step explanation:

9514 1404 393

Answer:

  (1/3)x +4

Step-by-step explanation:

One-third x is ...

  (1/3)x

Four more than that is ...

  (1/3)x +4

_____

Additional ways this can be written

  1/3x +4

  4 +1/3x

  x/3 +4

  4 +x/3

Researchers have noted a decline in cognitive functioning as people age (Bartus, 1990). However, the results from other research suggest that the antioxidants in foods such as blueberries can reduce and even reverse these age-related declines, at least in laboratory rats (Joseph et al., 1999). Based on these results, one might theorize that the same antioxidants might also benefit elderly humans. Suppose a researcher is interested in testing this theory. The researcher obtains a sample of adults who are older than 65, and gives each participant a daily dose of a blueberry supplement that is very high in antioxidants. After taking the supplement for 6 months, the participants are given a standardized cognitive skills test and produce a mean score of . For the general population of elderly adults, scores on the test average μ and form a normal distribution with σ=9.

(a)-Can the researcher conclude that the supplement has a significant effect on cognitive skill? Use a two-tailed

Answers

Complete Question

The complete question is shown on the first uploaded image

Answer:

a

Yes the researcher can  conclude that the supplement has a significant effect on cognitive skill

b

[tex]d =  0.5778 [/tex]

c

The result of this hypothesis test shows that there is sufficient evidence to  that the supplement had significant effect.The measure of effect size is  large due to the large value of Cohen's d (0.5778 > 0.30 )

Step-by-step explanation:

From the question we are told that

  The sample size is  n=16

    The sample mean is  [tex]M  =  50.2[/tex]

    The standard deviation is [tex]\sigma  = 9[/tex]

    The  population mean is  [tex]\mu =  45[/tex]

     The level of significance is  [tex]\alpha =  0.05[/tex]

The null hypothesis is [tex]H_o  \mu =45[/tex]

The alternative hypothesis is [tex]H_a  \mu \ne 45[/tex]

Generally the test statistics is mathematically represented as

          [tex]z =  \frac{M -  \mu}{\frac{\sigma}{\sqrt{n} } }[/tex]

=>       [tex]z =  \frac{50.2 - 45}{\frac{9}{\sqrt{16} } }[/tex]

=>       [tex]z =  2.31 [/tex]

Generally the p-value is mathematically represented as

     [tex]p-value  =  2 *  P(Z >  z )[/tex]

      [tex]p-value  =  2 *  P(Z >  2.31 )[/tex]

From the z-table  

      [tex]P(Z >  2.31 ) = 0.010444[/tex]

=>     [tex]p-value  =  2 *  0.010444 [/tex]

=>     [tex]p-value  =  0.021 [/tex]

From the obtained values we see that [tex]p-value <  0.05[/tex]

 Decision Rule

 Reject the null hypothesis

Conclusion

There is sufficient evidence to conclude that the supplement has a significant effect on the cognitive skill of elderly adults

Generally the Cohen's d for this study is mathematically represented as

    [tex]d =  \frac{M  -  \mu}{\sigma }[/tex]

=>  [tex]d =  \frac{50.2 -45}{9 }[/tex]

=>  [tex]d =  0.5778 [/tex]

Solve the inequality:


4x−2≤6

Select one:

x≥1

x≤2

x≥2

x≤1

Answers

Answer:

x≤2

Step-by-step explanation:

To do this, first add over the 2. That makes 4x≤8. Then divide by 4. That make x≤2

Answer:

x≤2

Step-by-step explanation:

4x-2≤6 add to 2 to both sides

4x≤8 divide both sides by four

x≤2

Hope this helps! :)

what is the percent of 74 is 37​

Answers

Answer:

50% take 37/74 ×100 to get the answer

The correct answer is 50.trust me it is

Drag these numbers from least to greatest. 0.7, - 4.5, 0.3, - 0.5, 2.3

Answers

-4.5, -0.5, 0.3, 0.7, 2.3

Answer:

-4.5, -0.5, 0.3, 0.7, 2.3

Step-by-step explanation:

use a number line:

-5n+4n-7=8
What is the answer for n and how do you solve it

Answers

Answer:

-15

Step-by-step explanation:

First combine like terms, aka the variables

-5n+4n-7=8

-1n-7=8

Then, isolate the variable by adding 7 to both sides

-1n-7+7=8+7

-1n=15

Finally, solve by dividing both sides by -1

-1n/-1=15/-1

n=-15

Answer:

n = -15

Step-by-step explanation:

I'll try my best to explain how I solved this

Equation:

-5n + 4n -7=8

Add the light terms on each side:

-n -7 =8

Separate the variables from the numbers:

-n = 15

Do the operation necessary to solve it:

n = -15

Hi can somebody help me with this equation, please? 50=2(x+3)+10

Answers

Answer: x = 17

Step-by-step explanation:

1) Subtract 10 from both sides

40 = 2(x+3)

2) Divide both sides by 2.

20 = x + 3

3) Subtract 3 from both sides

17 = x

x = 17

Answer: x= 17

Step-by-step explanation:

17 plus 3= 20

then you multiply 20 times 2 (PEMDAS)

Then you get 40 and 40 + 10

equals 50

Caroline walks 912 inches per second. As unit rate

Answers

Answer:

specify please

Step-by-step explanation:

Answer:

I have been trying to get this answer for the longest

Step-by-step explanation:

         

can you tell me how you get your answer

Answers

Answer:

The answer to this is: You click answer and then you just answer what the person asks and can i have brainliest?? please

Step-by-step explanation:

Answer:

For math I use my calculater :)

step-by-step explanation:

If gallon of paint covers of a wall, then how much paint is needed to cover the entire wall?

Answers

Answer:

4 gallons will be needed to paint an entire room

What is the product of 3/4 and6/ 7?
O -7/8
O -9/14
O 9/14
O 7/8

Answers

Answer:

Third choice. 9/14

Step-by-step explanation:

3/4 x 6/7 = 18/28 = 9/14

The coordinates for the vertices are A(1,3), B(4,0) ,C(1,-3) ,D(-2,0) what is the length of the AB

Answers

Answer: 3sqrt(2)

Step-by-step explanation:

d = sqrt[(3-0)^2 + (4-1)^2]

d = sqrt[9+9]

d = sqrt(18) = 3sqrt(2)

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