Is (4,12) a solution to 2x+y=40

Answers

Answer 1
No.

2x + y = 40
2x = 40
x = 40/2
x = 20

1y = 40
x = 40/1
x = 40

The right solution is (20,40)

Related Questions

Kara’s Custom Tees experienced fixed costs of $300 and variable costs of $2 a shirt. Write an equation that can be used to determine the total expenses encountered by Kara’s Custom Tees. Let x be the number of shirts, and let C(x) be the total cost of producing x shirts. Then, calculate the cost of producing 6 shirts.





An equation that can be used to determine the total cost of producing x shirts is C(x)= ___________

The cost of producing 6 shirts is $________

Answers

Answer:

c(x)=2x+300 and $312

Step-by-step explanation:

c(6)=2(6)+300

c(6)=12+300=312

for the function below find the following:

f(x)=25x^2-36

a. the zeros x=?

b. the x & y intercepts
(x,y) = ( )
(x,y) = ( )

c. the y intercept of the graph
(x,y) = ( )

Answers

Answer:

a. (-1.2,0) (1.2,0)

b. (-1.2,0) (1.2,0)(0,-36)

c. (0,-36)

Solve for x
X-11=-2

Help

Answers

Answer:

9

Step-by-step explanation:

x - 11 = - 2

x = - 2 + 11

= 11 - 2

x = 9

◻︎                                                                                                                            ◻︎

                                            Hello There!

We must make sure numbers are on the right side of the equation and x's (variables) are on the left:

x=-2+11

x=9

Hope this helps you! :)

Answered by:

[tex]GraceRosalia[/tex]

2. Convert the following lengths to cm. (a) 15 mm (b) 27 mm (c) 48 mm​

Answers

Answer:

15 mm = 1.5 cm

27 mm = 2.7 cm

48 mm = 4.8 cm

Solve using elimination.

8x − 7y = –5
–x + 4y = –15

Answers

Steps
8x−7y=−5
Add 7y to both sides
8x−7y+7y=−5+7y
Simplify
8x=−5+7y
Divide both sides by 8
8x
8 =−
5
8 +
7y
8
Simplify
x=
−5+7y
8

Answer:

Therefore, the values of "x" and "y" are -1000/312 and -115/39 respectively.

Step-by-step explanation:

★ Solution :-

[tex] \sf \leadsto 8x - 7y = -5 - - - (i)[/tex]

[tex] \sf \leadsto -x + 4y = -15 - - - (ii)[/tex]

By first equation,

[tex] \sf \leadsto 8x - 7y = -5[/tex]

[tex] \sf \leadsto 8x = -5 + 7y[/tex]

[tex] \sf \leadsto x = \dfrac{-5 + 7y}{8} [/tex]

Now, we can find the original value of y.

[tex] \sf \leadsto -x + 4y = -15[/tex]

[tex] \sf \leadsto \bigg( \dfrac{-5 + 7y}{8} \bigg) + 4y = -15[/tex]

[tex] \sf \leadsto \dfrac{-5 + 7y}{8} + 4y = -15[/tex]

[tex] \sf \leadsto \dfrac{-5 + 7y + 32y}{8} = -15[/tex]

[tex] \sf \leadsto \dfrac{-5 + 39y}{8} = -15[/tex]

[tex] \sf \leadsto -5 + 39y = -15(8)[/tex]

[tex] \sf \leadsto -5 + 39y = -120[/tex]

[tex] \sf \leadsto 39y = -120 + 5[/tex]

[tex] \sf \leadsto 39y = - 115[/tex]

[tex] \sf \leadsto y = \dfrac{ - 115}{39} [/tex]

Now, we can find the original value of x.

[tex] \sf \leadsto 8x - 7y = -5[/tex]

[tex] \sf \leadsto 8x -7 \bigg( \dfrac{ - 115}{39} \bigg) = -5[/tex]

[tex] \sf \leadsto 8x + \dfrac{805}{39} = -5[/tex]

[tex] \sf \leadsto \dfrac{312x + 805}{39} = -5[/tex]

[tex] \sf \leadsto 312x + 805 = -5(39)[/tex]

[tex] \sf \leadsto 312x + 805 = -195[/tex]

[tex] \sf \leadsto 312x = -195 - 805[/tex]

[tex] \sf \leadsto 312x = -1000[/tex]

[tex] \sf \leadsto x = \dfrac{-1000}{312} [/tex]

[tex]\textsf {\underline{Answer-}}\\[/tex]

Therefore, the values of x and y are -1000/312 and -115/39 respectively.

What is your weight on Jupiter? (g = 26.0 m/s^2)

Answers

Answer:

depends on how much you weigh

Evaluate the expression 2b + 5 when b = 3

Answers

Answer:

11

Step-by-step explanation:

Step 1:

Since b = 3, substitute 3 into the expression for b

2(3) + 5

Step 2:

2(3) = 6 so the expression is now 6 + 5

Step 3:

6 + 5 = 11

The answer to your problem is 11


Donald is thinking of buying a car but is looking at the annual running costs before he makes a purchase
These are his costs before adding on petrol and maintenance

Cost(£)
Tax - 110
Insurance - 360
Breakdown - 50

What fraction of these costs is his insurance?
3/4
9/13
1/7
5/6

Answers

Answer:

Step-by-step explanation:

Zygmund Oleksik is paid a salary of $800 a week to manage a party store. What amount will he make in one
year working at this job?

Answers

x = one week worked

x = $800

Then, Oleksik will earn $416,000 in 52 weeks (one year).

Josiah has 47 toy cars. If he organizes them in groups of 9 how many toy cars will be in the final group

Answers

Answer:

He Will Be Left With 2 Toy Cars

Step-by-step explanation:

Because 5 x 9 = 45

So 47 - 45 = 2

What is the value of this expression when P = 5 and q = -2 -3(p-q)^2

Answers

Answer:

-147

Step-by-step explanation:

-3(5--2)^2

-3x7^2

-3x49

-147


What is $36.99 in tax and 20% in tip?

Show your work! Please

Answers

The total is with tip $44.38 I don’t know the tax percent so that’s all I can do

<3 is a supplement of <2 and m<3= 76* Find m<2

Answers

Answer:

m < 2 = 104°

Step-by-step explanation:

Given that < 3 is a supplement of < 2, and that m < 3 = 76°, then:

To find the measure of m < 2, all you need to do is subtract the m < 3 from 180°.

m < 2 = 180° - m < 3

m < 2 = 180° - 76°

m < 2 = 104°

Hello again for the millionth time, need help on this, help pls, thx.

Answers

I am pretty sure it’s the third one

Solve the inequality

Answers

Step-by-step explanation:

3 - 4(y + 2) <= 6 + 4(2y + 1)

3 - 4y - 8 <= 6 + 8y + 4

-5 <= 10 + 12y

-15 <= 12y

12y >= -15

y >= -15/12 = -5/4

y >= -5/4

y € [‐5/4, oo)

Simplify.
1 - 4x + 3+ - 1 + 2
Enter your answer in the box.
Do not use decimals in your answer.
Basic
>
7
00
9
х
у
x2
vo
4
5
6
х
x=
XH

Answers

Answer:

4x + 4

Step-by-step explanation:

di ako sure pero i tried

Answer:

1/4 - 4x

Step-by-step explanation:

hope this helped

which expression is equivalent to the given polynomial expression? (9mn-19m^4n)-(8m^2+12m^4n+9mn)
A. -31m^4n+18mn-8m^2
B. -7m^4n+8m^2
C. -7m^4n+18mn-8m^2
D. -31m^4n-8m^2

Answers

9514 1404 393

Answer:

  D. -31m^4n-8m^2

Step-by-step explanation:

Eliminate parentheses by distributing the minus sign. Then collect terms:

  (9mn-19m^4n)-(8m^2+12m^4n+9mn) = 9mn -19m^4n -8m^2 -12m^4n -9mn

  = m^4n(-19 -12) +mn(9 -9) +m^2(-8)

  = -31m^4n -8m^2 . . . . . matches choice D

PLEASE HELP ME AND HURRY TOO NO LIBKS PLEASE I WILL GIVE BRAINLIEST

Answers

Answer:

[tex] \frac{1}{3} x - 5 - \frac{1}{6} x - 3 = \\ \frac{2}{6} x - \frac{1}{6} x - 8 = \frac{1}{6} x - 8[/tex]

Answer:

option D is the right answer

please mark this answer as brainlist

Can someone help me pls

Answers

Answer:

2.85 x 10^4

Step-by-step explanation:

if the lcm of a number is 630 and the HCF is 10 what will be the first number it the second number is 10​

Answers

Answer:

1000

Step-by-step explanation:

Plot all points that are a distance of 7 units from 4. What are their values?

Answers

Distance is the number of units between points.

The distance that are 7 units from 4 are: 11 and -3

A distance of 7 units from 4 means:

[tex]x - 7 = 4[/tex]  or [tex]x + 7 =4[/tex]

Where:

x is the required distance

Solve for x in both equations.

[tex]x - 7 = 4[/tex]

[tex]x = 7 + 4[/tex]

[tex]x = 11[/tex]

[tex]x + 7 =4[/tex]

[tex]x =4 - 7[/tex]

[tex]x =- 3[/tex]

So, the distance that are 7 units from 4 are: 11 and -3

See attachment for illustration

Read more about distance at:

https://brainly.com/question/7942332

An online school with 125 classes has a student enrollment of 2,500 students. Which rate represents the relationship between the student enrollment and the number of classes? 12 classes per student 20 classes per student 20 students per class 30 students per class

Answers

Answer 20 classes per student

Step-by-step explanation:




1st Question

3x + 8y = -4

2x - 4y = 16

2nd Question

6x - y = 16

x = 4y - 5

3rd Question

x + y = 19

3x - 2y = -3

Answers

9514 1404 393

Answer:

(x, y) = (4, -2)(x, y) = (3, 2)(x, y) = (7, 12)

Step-by-step explanation:

When you have a lot of the same kind of problem to solve, it makes a certain amount of sense to let a spreadsheet do it. You can enter the formulas once, and then all you need to do is supply the different data for the different problems.

Here, we can put the equations into standard form, then use Cramer's Rule to solve them. For the two equations ...

ax +by = cdx +ey = g

we can define ...

  D = (ae -db)

Then the values of x and y are ...

  x = (ce -gb)/D

  y = (ag -dc)/D

The attached spreadsheet implements these equations to find the values of x and y.

__

The second equation of the 2nd Question is not given in standard form. To put it into standard form, we need to subtract 4y from both sides:

  x -4y = -5

_____

Additional comment

Many graphing calculators have matrix functions that will solve sets of linear equations, too. For those, you can use the function that puts the coefficient matrix into Reduced Row-Echelon Form. Often that function is named RREF( ), as it is on my TI-84 and HP-48 calculators. The input coefficient matrix will look like ...

  [tex]\left[\begin{array}{ccc}a&b&c\\d&e&g\end{array}\right][/tex]

and the output matrix will look like ...

  [tex]\left[\begin{array}{ccc}1&0&\text{x-value}\\0&1&\text{y-value}\end{array}\right][/tex]

Effectively, the equations are solved by "elimination." If the calculator shows [0 0 0] in the bottom row of output, it means the equations are dependent and there are infinite solutions. If it shows [0 0 1], the equations are inconsistent, and there are no solutions.

Right triangle CDE has its right angle at vertex
D. The length of DE is 8 feet and the length of
CE is 17 feet. What is the length, in feet, of CD?
A) 11
B) 12
C) 14
D) 15

Answers

The answer is A 11 feet

The length of the side CD which is the base of the right triangle CDE is 15 feet which is option D.

We have,

We can use the Pythagorean theorem to solve for the length of the height CD in the right triangle CDE.

Where CE is the hypotenuse and De is the base.

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

In this case, we have:

CD² + DE² = CE²

Plugging in the given lengths:

CD² + 8² = 17²

CD² + 64 = 289

CD² = 289 - 64

CD² = 225

CD = √225

CD = √15²

CD = 15

Thus,

The length of the side CD which is the base of the right triangle CDE is D. 15 feet.

Learn more about the Pythagorean theorem here:

https://brainly.com/question/14930619

#SPJ3

You hike 1.2 miles west from a trailhead and then receive a text from a friend. She
is.x miles west of the trailhead. You hike to meet her, and then you both hike back
to where you left off on the trail. You hiked 2.7 miles in total. Formulate an absolute
value equation to represent this situation,

Answers

Answer:

the answer is definitely 4

HELP ME NOW!!! PLS I DONT KNOW THSE TPYE OF STUFF

Answers

Answer:

10 yd, because you subtract 15 to 5.

please help! no work needs to be shown:)

Answers

Angle 4 :)

Alternate Exterior Angles are a pair of angles on the outer side of each of those two lines but on opposite sides of the transversal.


9. The total length of the Trans-Canada Highway is 7870 km. About 6% of
the highway is in Alberta. How many kilometres are in Alberta?

Answers

Answer:

472.2 km

Step-by-step explanation:

What is the value of the 3 in the number 2.703?​

Answers

Given number is 2.703.

Its a decimal number

Hence three is not the hundredth place holder.

3 is decimal 1/thousand place holder.

See below

[tex]\\ \sf\longmapsto 3\times \dfrac{1}{1000}[/tex]

The lunch check is $16.98. Estimate the tip
using a rate of 15%

Answers

Answer:
Tip would be $2.55

Explanation:
To calculate the tip. Multiply the rate over 100 by the price of the food.
15/100 = 0.15
So, 16.98*0.15 = 2.547
Round up to $2.55
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