Error Analysis A student added the rational
expressions as follows:
5x 7 5x 7(7) 5x + 49
+
+
x
x + 7
Describe and correct the error the student
12
x+7
Х
x+7
x+7

Answer:

$1,800,000 dollars

Step-by-step explanation:

Given the following question:

10% of 2,000,000

An app brought in $2 million in revenue before giving 10% of that revenue to pay for prizes. We need to find how much revenue did the app earn AFTER the store paid for the reward prizes.

[tex]\frac{10\times2000000}{100} =10\times2000000=20000000\div100=200000[/tex]
10% of 2 million is 200,000.
[tex]2000000-200000=1800000[/tex]

The app earned "$1.8 million" after paying for the reward prizes.

Hope this helps.

Answer:

ties cost $3

shirts cost $15

Step-by-step explanation:

s=shirts

t = ties

3 shirts and 5 ties cost $60:

3s+5t=60

2 shirts and 3 ties cost $39:

2s+3t=39

−2(3s+5t=60)

3(2s+3t=39)

−6s−10t=−120

6s+9t=117

add equations together:

−t = −3

t = 3

so ties cost $3, use either of the original equations to solve the price of shirts:

2s+3⋅(3)=392

s+9=392s=30

s=15

so shirts cost $15

Answer:

3s + 5t = 60 and 2s + 3t = 39

Step-by-step explanation:

Answer:

36 ounces

Step-by-step explanation:

1 lb = 16oz

So just multiply 2 lb by 16 to get 32.

Then you can multiply 16 by 0.25 (a.k.a 1/4) OR divide 16 by 4

You get 4 ounces

Finally, add 32 and 4 to get your total of 36 ounces.

Answer:

9.9x + 16.1

Step-by-step explanation:

SImplify using like terms

Simplify:

-Chetan K

Answer:

yes it is a rational number because the square root of 0.49 is 0.7

Step-by-step explanation:

Hope that helps!

Answer:

7,456 im only 9 but i think it's right.

Step-by-step explanation:

Answer:  The answer is 7,456!

Step-by-step explanation: 78 x 78 + 30 x 30 + 20 times 20 + 72 equals to 7456!

Answer:

Jack's fathers work is 1350 miles away from home

Step-by-step explanation:

Equation for trip 1:

Usual speed=x

Time=30 minutes

Formula for distance: d=st

d=30x

Equation for trip 2:

Speed= x-30

Time=90 minutes

d=90(x-30)

Now we solve for x using simultaneous equations:

30x=90(x-30)

x=45

Now to find d we sub in our new found value into one of the two equations (it doesn't matter which one)

d=30(45)

d=1350 miles

Function

d. 4f(t)

=4(t²+9)

=4t²+36

e. (f(t))²+8

=(t²+9)² + 8

= t⁴+18t²+81+8

= t⁴+18t²+89

Answer:

7

Step-by-step explanation:

love is = 4, because love + love = 8 meaning its 4+4

heart is = 5, because heart - 4(love) = 1

bird is = 3, because bear is = 9 since 5(heart) + 4(love) is bear, and 3 birds make  a bear.

Answer:

17

8 ÷ 2 = 4. love = 4.

heart - 4 = 1. heart = 5.

love 4 + heart 5 =9. bear =9

9÷3=3. birds = 3.

Using proportions, it is found that his total electricity cost for the fans during one year is given by:

b. $3.84

A proportion is a fraction of a total amount.

In this problem, for 3 months, he uses 4 portable fans, and each fan is on for about 96 hours per month, hence the total number of hours he uses it is:

4 x 96 = 384 hours.

The cost is one one cent per hour, hence:

$0.01 x 384 = $3.84.

Which means that the total cost is of $3.84, and option b is correct.

More can be learned about proportions at https://brainly.com/question/24372153

Answer:

Tom should use a ladder that is smaller or at the the same height of the window frame. Here it says that he is using a ladder that is taller than the window frame, and this can be very uncomfortable for the person who is using the ladder, so it would be recommendable for Tom to use a smaller ladder, probably a ladder that is only a few inches smaller or taller than the window frame. Using a ladder that is like this should be safe to use.

Step-by-step explanation:

Hope this helps =)

Answer:

A farmer keeps a record of the weekly milk yield of his herd of seven cows over a period of six months. He finds that the mean yield is 24 liters. He buys another cow that he is told will produce 28 liters of milk a week. Work out the effect this will have on the mean milk yield of his cows.​

Step-by-step explanation:

Hope it helps<3

Answer:

24.5 liters/week

Step-by-step explanation:

24 liters/week for 7 cows is 168 liters/week

Add 1 cow that produces 28 liters/week

The new total is 196 liters/week for 8 cows

(196 liters/week for 8 cows)/(8 cows) = 24.5 liters/week is the new mean.

Answer:

x=1.5

Step-by-step explanation:

Answer: X = -24 Y = 66

Step-by-step explanation:

5(-6) = -30

X = 6 - 30 = -24

Y = 42 + 24 = 66

Hello there, Today we will solve your math problem

[tex]{\huge{\boxed{\mathfrak{{Question}}}}[/tex]

[tex]x+y=42\\x-6=5(-6)[/tex]

________________

First off let's isolate [tex]x[/tex]

after doing that we can substitute [tex]x[/tex] for [tex]-12[/tex]

Here is our equation

[tex]-12+y=4[/tex]

solve for [tex]y[/tex] and we get that [tex]y=16[/tex]

________________

[tex]{\huge{\boxed{\mathfrak{{Answer}}}}[/tex]

Remainder theorem tells about the remainder of division of a polynomial with x - a. The roots of given function are: 1, -1, -3

If there is a polynomial p(x), and a constant number 'a', then

[tex]\dfrac{p(x)}{(x-a)} = g(x) + p(a)[/tex]

where g(x) is a factor of p(x)

For the given case, we've got:

[tex]f(x) = x^3 + 3x^2 -x - 3[/tex]

and

f(1) = 0

Thus, for a = 1, from remainder theorem, we get:

[tex]\dfrac{p(x)}{(x-a)} = g(x) + p(a)\\\\\dfrac{f(x)}{(x-1)} = g(x) + f(1)\\\\\dfrac{x^3 + 3x^2 - x - 3}{(x-1)} = g(x) + 0\\\\ \dfrac{x^2(x+3) -1(x+3)}{x-1} = \dfrac{(x^2-1)(x+3)}{(x-1)} = g(x)\\\\(x+1)(x+3) = g(x)[/tex]

Thus, the other factor of f(x) is g(x) = (x+1)(x+3)

And we have:

[tex]\dfrac{f(x)}{x-1} = g(x)\\\\f(x) = (x+1)(x+3)(x-1)[/tex]

Putting it equal to 0, we get:

[tex]f(x) = 0\\(x+1)(x+3)(x-1) = 0\\x = 1, -1, -3[/tex]

Thus,

The roots of given function are: 1, -1, -3

Learn more about polynomial remainder theorem here:

https://brainly.com/question/10488065

Answer:

A

Step-by-step explanation:

got it right on Edge 1943 whilst fighting the German Forces in Northern Italy while my friends were on the beaches of Normandy.

Answer: 3

Step-by-step explanation:

Divide the x numbers by 3 to then get the y numbers

Example: 3 divided by 1 is 3, 6 divided by 2 is 3, and it goes on!

once again the final answer is 3

hope this helps!

Answer:

14.

Step-by-step explanation:

1. RS=RU+US, - US is unknown yet;

2. the property of bisector is:

RU/US=RT/ST;

3. according to the property above:

US=RU*ST/RT; US=12*6/9=8;

4. RS=RU+US; ⇒ RS=6+8=14.

Answer:

5 weeks

Step-by-step explanation:

[tex]7.8*20x=780[/tex]

[tex]156x=780[/tex]

[tex]\frac{156x}{156}=\frac{780}{156}[/tex]

[tex]x= 5[/tex]

Hence, the correct answer is 5 weeks.

[RevyBreeze]

Answer:

B√134

Step-by-step explanation:

the answer is B(√134)

hope it helps

Answer:

B

Step-by-step explanation:

Answer:

48

Step-by-step explanation:

All of the sides are 48 because a rhombus has equal sides.

The measure of y is 48.

Given:

As, we know that Rhombus resemble property of Square which has all sides Equal.

Then, the four sides of Rhombus are also Equal.

Then, x=z and y= 48.

Hence, the measure of y is 48.

Learn more about Rhombus here:

https://brainly.com/question/27870968

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Answer:

I believe the answer is $27.32

Answer:

25

Step-by-step explanation:

（2x+15）+x+90=180

3x=75

x=25

Answer:

6 $1 bills, 5 $5 bills

Step-by-step explanation:

Say the student has x $1 bills.

Then they have 11 - x $5 bills.

31 = 1 * x + (11 - x) * 5 = 55 - 4x

4x = 55 - 31 = 24

x = 6

So, they have 6 $1 bills and 11 - 6 = 5 $5 bills

Answer:

5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1. As you see those are eleven numbers/bills so your answer may be, The student has 5, 5$ bills and 6, 1$ bills. which makes up 31$.

Step-by-step explanation:

Answer: -1

Step-by-step explanation:

Take 2 random coords from the graph to find the slope

(0,4) and (2,2)

(4-2)/(0-2) = -1

Slope

Pick two points on the line

[tex]\tt slope=\dfrac{\Delta Y}{\Delta X}=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

point 1: -4,5

point 2: 0,3

[tex]\tt slope=\dfrac{5-3}{-4-0}=\dfrac{2}{-4}=-\dfrac{1}{2}[/tex]

Answer:

710

Step-by-step explanation:

1 centimeter = 0.1 mi millimeter so 71 centimeters= 710 millimeters

i'm in k12 and i just took the test too

hope this helps have a good day ^ω^

The length of Kira's skateboard in millimetres is 710 mm

A unit conversion expresses the same property as a different unit of measurement.

Given that, Kira's skateboard is 71 centimetres long.

1 cm = 10 mm

Converting the units,

71 cm = 10×71 = 710 mm

Hence, the length of Kira's skateboard in millimetres is 710 mm

For more references on unit conversion, click;

https://brainly.com/question/19420601

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Sides given by

Opposite sides must be equal

Let's check once

[tex]\\ \tt\hookrightarrow x+5=2x+3\implies x=2[/tex]

Find sides now

One pair of opposite sides are equal but others not .

Answer:

Step-by-step explanation:

The opposite pairs are:

1)

2)

x + 5 with 2x - 3

It makes:

The sides are:

Correct answer choice is 1)

Answer:

[tex]49x^2+126xy+81y^2[/tex]

Step-by-step explanation:

Use the square of a binomial theorem

[tex](a+b)^2[/tex]= [tex]a^2+2ab+b^2[/tex]

Now expand the given equation:

[tex](7x+9y)^2=49x^2+126xy+81y^2[/tex]

Hope this helps :)

Have a great day!

Answer:

Quadrant 2

Step-by-step explanation:

A 90 °counterclockwise rotation, rotates the triangle left one quadrant. Currently the triangle is in quadrant 3.

Answer:

Question 9 right? Well then it would be in quadrant IV

Step-by-step explanation:

Since it is just 90 degrees counterclockwise it would go to the fouth quadrant.