find the sum of x^2 + 3x and 2x^2 + 9x + 5

Answers

Answer 1

Answer:

[tex] 3 {x}^{2} + 12x + 5[/tex]

Step-by-step explanation:

[tex](x^2 + 3x) + (2x^2 + 9x + 5) \\ \\ = x^2 + 3x + 2x^2 + 9x + 5 \\ \\ = {x}^{2} + 2 {x}^{2} + 3x + 9x + 5 \\ \\ = 3 {x}^{2} + 12x + 5[/tex]


Related Questions

You have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both
machines. The amount of calories burned on each machine is shown in the picture below. How
much time should you spend on each machine?


Machine a burns 8 calories per minute machine b burns 6 calories per minute.

Answers

a and b are the minutes spent on machine A and machine B, respectively.

a+b = 40
b = 40-a

8a + 6b = 300
8a + 6(40-a) = 300
8a + 240 - 6a = 300
2a = 60
a = 30
b = 40-a = 10

30 minutes on machine A and 10 minutes on machine B

Find the slope of the line that goes through (3,5) and (9,-2).

Answers

Answer:

-7/6

Step-by-step explanation:

the slope is change in y/change in x:

-2-5/9-3 = -7/6

The answer above me is right

4
What is the result of 2-10?
.
1
5

Answers

Answer:

-3.14530027393739338363829263839

-Step-by-step explanation:

Please help
How can you describe the graph of the equation y= mx + b? Explain

Answers

Answer:

mx is the slope. b is the y-intercept

Step-by-step explanation:

the first thing you should always do is identify your slope this is key for graphing. remember your slope is b so what ever b is you locate that point in the x axis.

then whatever your slope is remember that it is rise over run so say your equation is y=3x+5 you plot the point on the y intercept which is 5. now 3x is your slope so you put it as a fraction to make it easier this is what it looks like in a fraction "3/1" so you go up 3 on the graph and over 1 because of rise/run

what is the answer?136,88,or 44?

Answers

Answer:

136

Step-by-step explanation:

Please I need helppppppp

Answers

Answer:

Step-by-step explanation:

The conversion factor is 454 grams / pound. That makes the answer D.

All of the answers have the right digits. It's the number of zeros that cause the problem.

Answer:

450 grams is the closest metric weight of 1 pound which in actuality is 453.592 gram.

Which angle is an exterior angle?

Answers

Answer:

I presume that i° would be the exterior angle for this question.

Step-by-step explanation:

milk truck delivers 376 dozen gallons of milk to stores in 1 day. Write and solve an equation to find n​, the number of gallons of milk the milk truck delivers in 1 day. pls help!

Answers

Answer:

376*12=n

My logic:

there are 12 items in a dozen. so 376 dozens times 12 will result in the total milk delivered in a day.

can someone
please help and fast

Answers

Answer:18

Step-by-step explanation:

same as other side 90 degrees

HELO PLS DUE IN 40 MINS

In the diagram below, it is given that point Ris the midpoint of PQ. Which of the following can be concluded
based on this given?

Answers

Answer:

Sheesh good luck

Step-by-step explanation:

.........

Answer:

3

Step-by-step explanation:

MN is not equal to NR, because MN is too long

It doesn't tell us R is the midpoint of MN, so for all we know MR and RN are completely different measurements.

PR and QR must be equivalent if R is the midpoint of the two.

6 mi Find the volume for the shape above. Use 3.14 for pi. Round to the nearest whole number.​

Answers

Answer:

Step-by-step explanation: does anyone know? I really need this

Im a bit stuck on this problem

Answers

Answer:

f I I tough luck if it's if I've if it's if you've paid down let of us if just it ubos skits enough of others

Step-by-step explanation:

digital shall will also sorry soap sorry s goo form enough wish all so do all kelan kaso kaka kalakalorry root sorry for

You want to purchase multiple books on sale for $6.30. The sales tax is 5% and you have $20. At most, how many books can you buy?

Answers

Answer:

3 books

Step-by-step explanation:

Assume x is the number of books you could buy.

(1+0.05)(6.3x) ≤ 20

1.05(6.3x) ≤ 20

6.615x ≤ 20

x ≤ 3.02

Answer:

the awnser is 3 books yiu can buy

After a 60% reduction, you purchase a new sofa drink machine on sale for $312.
What was the original price of the sofa drink machne?

Answers

Search up 0.60 x 312= 187.2, 187.2 + 312 = 499.2

I NEED HELP ASAP!!!!!!!

Answers

Answer:

y = -0.5x + 3

Step-by-step explanation:

The equation of a linear model is generally represented as;

y = mx + b

where m

is slope and b is the y-intercept

We can get slope by using the slope equation

m =

(y2-y1)/(x2-x1)

(x1,y1) = (-4,5)

(x2,y2) = (4,1)

m = (1-5)/(4 + 4) = -4/8 = -0.5

The equation is thus;

y = -0.5x + b

to get b, we substitute any of the two points coordinates

1 = -0.5(4) + c

1 = -2 + c

c = 2 + 1

c = 3

If x= -3 is one solution of x2 + 9x + 18, what is the other solution?​

Answers

(x+6)(x-3)
So x=-6 or x=3

Mark is making jackets. Mark took 2 hours to make a jacket. The jacket was made up of 50 kilograms of wool. How long do you think it will take Mark to use 500 kilograms of wool for the jackets?

Answers

Given:

Mark took 2 hours to make a jacket.

The jacket was made up of 50 kilograms of wool.

To find:

The time in which Mark use 500 kilograms of wool for the jackets.

Solution:

We have,

1 jacket take 2 hours.

Number of jackets in 50 kg of wool = 1

Number of jackets in 1 kg of wool = [tex]\dfrac{1}{50}[/tex]

Number of jackets in 500 kg of wool = [tex]\dfrac{1}{50}\times 500[/tex]

                                                              = [tex]10[/tex] Jackets

Time taken by 1 jacket = 2 hours

Time taken by 10 jacket = 20 hours

Therefore, it will take 20 hours to use 500 kilograms of wool for the jackets.

Answer:

20 hours

Step-by-step explanation:

1 jacket=50kg wool

1 jacket= 2hrs

500kg available/50kg per jacket= 10 jackets

10 jackets x 2hrs per jacket=20hrs

2 1/6 x 4 1/2 Solve the problem AND explain your steps

Answers

The answer is 9 3/4, 9.75
Explanation: 13/6 x 9/2
(reduce) 13/2 x 3/2
(Multiply 13/2 x 3/2)
39/4
(Reduce again) 9 3/4 or 9.75
Hope this helps

What property must be used when solving each step of a one variable linear equation?

Answers

add, subtract, multiply, or divide an equation by a number or an expression as long as we do the same thing to both sides of the equal sign. ...

Apply the distributive property as needed:

Isolate the variable on one side of the equation.

Step-by-step explanation:

(HELP FAST PLEASE)
Three identical cell phones weigh 18.7 ounces. What is the combined weight of two cell phones that are also identical to the three cell phones mentioned in the first sentence?

Answers

Answer:

Two of them, actually.) ... It weighs 4.87 ounces — less than a third of a pound. ... In the photo shown above, Philip Shenon, a Times reporter, sits with ... Phil and I carried the satphone from Frankfurt — it was housed in two 65-pound suitcases. ... Modern mobile satellite data units weigh a total of about three

Step-by-step explanation:

thats all i know

What is the range of the data set below?
25, 24, 24, 24, 33

Answers

Answer:

9

Step-by-step explanation:

the range is the difference between the greatest value and the smallest one. The greatest value in the data set is 33, and the smallest is 24.

So u just subtract 24 from 33:

33 – 24 = 9

and that's your range! hope this helps!

You find range by subtracting the largest sum from the smallest sum so your answer would be 33-24=9
Answer 9

Please help me with this homework

Answers

Answer:

Step-by-step explanation:

No Taxi - 95

No Bus total - 275

Yes Taxi total - 120

Total Total - 400

PLEASE HELP ME!

Solve: system by elimination form

1.
2x + y = 25
3y = 2x - 13
----------------------------------------------------

Answers

2x+y=25
-2. -2
1y=23
1y=1y
Y=23
Here is the answer this is the full answer Im just typing cause the app want me to do

what is 1+1= ? and how do you do it? also what is the pendas mean?

Answers

Answer:

2,  PEMDAS means parentheses, exponents, multiplication, division, addition, and subtraction.

Step-by-step explanation:

What is the answer????please helpp

Answers

that answer is (0,0)

I NEED HELP PLZ MY SMART PPL

Answers

Answer:

its 60

Step-by-step explanation:

if its right caan i get a brainliest

Answer:

60

Step-by-step explanation:

To get the area of a right triangle (a triangle with an angle of 90 [represented by the box in the corner]) you have the formula of

Area = (a*b) divided by 2

a = one side of the triangle

b = another side of the triangle

Neither side are the hypotenuse.

whats an"an amount, shared equally with 4 people "

Answers

well if that's in a math problem then its division. Because you are sharing equally.

Pleaseee I need help it’s a major grade

Answers

Answer: D.

Step-by-step explanation:

48/2.15= d, so 2.15d=48

What is the area of the composite shape?

Answers

Answer:

I believe it is 76 ft squared but I am not positive..

Hdushshshsbabshdjdjc

¿cuantos envases se necesitan, si ponemos los 6 litros en envases de 3/4 litros?​

Answers

se necesitan 8 envases

denada

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