Liang's solution of a system of linear equations is shown. Explain her error. 3x − 2y = 12 −x − 2y = −20 2x + 0 = −8 x = −4 −(−4) − 2y = −20 4 − 2y = −20 − 2y = −24 y = 12 Enter the solution as an ordered pair. (−4, 12) Complete the explanation for Liang's error and give the correct solution. Liang (select) the two equations, but (select) the y−terms. The equations should be (select) . The solution is .

Answer:

0.441

Step-by-step explanation:

[tex](6.3 \times 10^3) \times (7 \times 10^{-5} ) \\ \\ = 6.3 \times 7 \times 10^3\times 10^{-5} \\ \\ = 44.1 \times {10}^{3 - 5} \\ \\ = 44.1 \times {10}^{ - 2} \\ \\ = 0.441 [/tex]

Answer:

Step-by-step explanation:

Here, ABCD is a parallelogram.

∠CBD=40

o

 and ∠BAD=80

o

.

AD∥BC and BD is a transversal.

∴  ∠ADB=∠CBD            [ Alternate angles ]

∴  ∠ADB=40

o

.

∴  y=40

o

.

In △ADB,

⇒  ∠ADB+∠DBA+∠BAD=180

o

⇒  40

o

+x+80

o

=180

o

⇒  120

o

+x=180

o

⇒  x=180

o

−120

o

⇒  x=60

o

We get, x=60

o

 and y=40

o

.

Answer:

∠p= 15°  ,  ∠q = 108°   , ∠r = 57°  Is the Answer

Step-by-step explanation:

, (x -12)° + (5x-27)° + (2x + 3)° = 180°

or,  8x° -36° = 180°

Or x =

So, x = 27°

∴ ∠P = 27° -12°  = 15°

 ∠q = (5 × 27)° -27° = 108°

 ∠r = (2 × 27)° + 3° = 57°

Its either 2/5 or 4/5

Answer: The answer is 2/5  hope i helped! Mabye brainliest? ^^

Step-by-step explanation: if you can pick more than 1, pick 2/5 and 4/5

Answer:

if we carefully observe, left-bottom model contains 4 units on each side of the cube.

Therefore, we conclude that left-bottom model represents the [tex]\sqrt[3]{64}=4[/tex].

The correct model is attached below.

Step-by-step explanation:

Given the expression

[tex]\sqrt[3]{64}=4[/tex]

Cubing both sides

64 = 4³

Thus, the cube will have 4 units on each side.

Now, if we carefully observe, left-bottom model contains 4 units on each side of the cube.

Therefore, we conclude that left-bottom model represents the [tex]\sqrt[3]{64}=4[/tex].

The correct model is attached below.

Answer:

59

Step-by-step explanation:

(2x-1)+(3x+1)+x=180

6x=180

x=30

((2×30)-1)= 59

Answer: (16,-12)

Step-by-step explanation: just cuz... just listen linda

Answer:

(16,-12)

Step-by-step explanation:

I used a graph to get this answer

Step 1: Our output value is 350.

Step 2: We represent the unknown value with $x$.

Step 3: From step 1 above,$350=100\%$.

Step 4: Similarly, $x=25\%$.

Step 5: This results in a pair of simple equations:

$350=100\%(1)$.

$x=25\%(2)$.

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

$\frac{350}{x}=\frac{100\%}{25\%}$

Step 7: Again, the reciprocal of both sides gives

$\frac{x}{350}=\frac{25}{100}$

$\⇒x=87.5$

Therefore, $25\%$ of $350$ is $87.5$

Answer:

50 dgrees

Step-by-step explanation:

staruight line is 180 so 180 minus 130 is 50

Answer:

they answer is y^6=−y^3

Step-by-step explanation:

Answer:

y^6=−y^3

Step-by-step explanation:

Answer:

k=1    k= -1

Step-by-step explanation:

hello :

here is an solution

Answer:

Then if there were 10 campers, there would be 5 counselors

Step-by-step explanation:

For every five campers, there is one counselor. Divide the number of campers by 2 two find how many counselors there are.

Step-by-step explanation:

[tex] \sqrt{9} + \sqrt{25} - 8 \div 2 + {3}^{2} \\ = 3 + 5 - 4 + 9 = 13[/tex]

Answer:

1/12 + 1/2 = 1/12 + 6/12 - 1+6/12 = 7/12

Step-by-step explanation:

hope this makes sense

Step-by-step explanation:

1/2 of 12/12 is 6/12.

So, this means: 1/12 + 1/2 = 7/12

                                      is

                          1/12 + 6/12 = 7/12

Answer:

40x-32

Step-by-step explanation:

First, you multiply 8 time 5x which equals 40x. Next, you multiply 8 times 4 which equals 32, so it is 40x-32

Answer:

The answer is d

Step-by-step explanation:

[tex]\frac{PQ}{JK}[/tex] ≅ [tex]\frac{PS}{JL}[/tex]

Answer:

A

Step-by-step explanation:

Is the correct answer

The perimeter of the polygon after dilation = 27 unit

The scale factor in a mathematical object's dilatation defines how much the picture will grow or shrink in relation to the original thing.

The perimeter of polygon = 18 unit,

Since, the scaling factor is 3/2,

So when the polygon is dilated, the perimeter of the polygon will also multiply with 3/2,

Perimeter of polygon = 18×3/2

                                    = 27 unit

The perimeter of the polygon after dilation = 27 unit

To know more about Dilation factor on:

https://brainly.com/question/13176891

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Answer:

(3 +/- i*sqrt(151) / 20 (no real solutions)

Step-by-step explanation:

10x^2 - 6x + 4 = -3x

Add 3x to both sides

10x^2 - 6x + 4 + 3x = -3x + 3x

10x^2 - 6x + 4 + 3x = 0

Add like terms

10x^2 - 3x + 4 = 0

We have to use quadratic formula to find the answers

For this equation, a = 10, b = -3 and c = 4

Note: +/- is plus or minus

Quadratic formula:

x = (-b +/- sqrt(b^2 - 4ac)) / 2a

x = (-(-3) +/- sqrt(-3^2 - 4(10)(4))) / 2(10)

x = (3 +/- sqrt(9 - 160)) / 20

x = (3 +/- sqrt(-151) / 20

x = (3 +/- i*sqrt(151) / 20

if there's a "-" sign inside a square root, it will give you an imaginary number.

Example:

-sqrt(9) = -3

sqrt(-9) = 3i (first you will ignore the "- " sign, then square the number. After finding the square root, take that '-' sign and turn it to an "i")

So for sqrt(-151), 151 is not a perfect square, so you will get a decimal number. Leave it as it is:

sqrt(151). We can't forget about the "-". Turn the minus into a sign.

It will be i*sqrt(151)

Imaginary numbers can't be simplified, so this is the answer.

(3 +/- i*sqrt(151) / 20

Answer:

A

Step-by-step explanation:

I graphed it

Answer:

The answer is 6y - 7x = 48

If you graph it you will see it is 6y - 7x = 48

Hope this helps!

Answer:

13/24

Step-by-step explanation:

For every 24 heart beats of the kitten, the cats heart beats 13 times.

Answer:

2.25π square inches

Step-by-step explanation:

Area = π[tex]r^{2}[/tex]

Diameter = 2r

So in this case, radius = 1.5 inches

Plugging that into the area formula produces the answer

Answer:

Step-by-step explanation:

Answer:

hard core question

Step-by-step explanation:

Answer:

9 hours and 20 minutes: b

Step-by-step explanation:

4*60=240

7x240=1680

1680/3=560

560= 9 h 20 m

The time required when 3 electricians are working is 9 hours and 20 minutes.

An expression contains one or more terms with addition, subtraction, multiplication, and division.

We always combine the like terms in an expression when we simplify.

We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.

Example:

1 + 3x + 4y = 7 is an expression.com

3 + 4 is an expression.

2 x 4 + 6 x 7 – 9 is an expression.

33 + 77 – 88 is an expression.

We have,

The time required to complete the job varies inversely with the number of people working.

This means that if the number of people working decreases, the time required to complete the job will increase.

We can use the formula for inverse variation to solve the problem:

t = k/n

where t is the time required to complete the job, n is the number of people working, and k is a constant of proportionality.

We can find k by plugging in the given values:

4 = k/7

k = 28

Now we can use the formula to find the time required when 3 electricians are working:

t = 28/3

t ≈ 9.33 hours

Converting this to hours and minutes, we get:

t ≈ 9 hours and 20 minutes

Thus,

The time required when 3 electricians are working is 9 hours and 20 minutes.

Learn more about expressions here:

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Answer:

b

Step-by-step explanation:

Answer:

I can help with number 7 if you want

1. Equation

y=15x + 10

This is the answer because 10 intercepts on the y axis and it says $15 dollars each.

2. -2 so you do y-y and x-x. In this case its 4-2 and 2-3 which equals 2 and -1 . Which  divided equals -2.

Sorry I can't figure out the rest but I did do these ones.

Answer:

$1.90

Step-by-step explanation:

I think so sry if I'm wrong

boom roasted