Write the following using algebraic notation, using the letter x for any unknown numbers: I think of a number, double it, then add nine

Answers

Answer 1

Answer:

2x+9

Step-by-step explanation:

You think of a number: x

Double it: 2*x=2x

Add 9: 2x+9


Related Questions

I would just like some solving steps or the answers.

Answers

Ooooooooooooooooooooh

Find the area of this parallelogram.
A)
20 cm2
B)
24 cm²
40 cm²

Answers

Answer:

It's 40cm²

Step-by-step explanation:

Base times height.

The answer is :
A) 20cm



Are the ratios 18:6 and 3:1 equivalent?

Answers

Answer: no

Step-by-step explanation: here are all the ratios equivalent to 18:6 18 : 636 : 1254 : 1872 : 2490 : 30108 : 36126 : 42144 : 48162 : 54180 : 60198 : 66216 : 72234 : 78252 : 84270 : 90288 : 96306 : 102324 : 108342 : 114360 : 120378 : 126396 : 132414 : 138432 : 144450 : 150468 : 156486 : 162504 : 168522 : 174540 : 180558 : 186576 : 192594 : 198612 : 204630 : 210648 : 216666 : 222684 : 228702 : 234720 : 240738 : 246756 : 252774 : 258792 : 264810 : 270828 : 276846 : 282864 : 288882 : 294900 : 300918 : 306936 : 312954 : 318972 : 324990 : 3301008 : 3361026 : 3421044 : 3481062 : 3541080 : 3601098 : 3661116 : 3721134 : 3781152 : 3841170 : 3901188 : 3961206 : 4021224 : 4081242 : 4141260 : 4201278 : 4261296 : 4321314 : 4381332 : 4441350 : 4501368 : 4561386 : 4621404 : 4681422 : 4741440 : 4801458 : 4861476 : 4921494 : 4981512 : 5041530 : 5101548 : 5161566 : 5221584 : 5281602 : 5341620 : 5401638 : 5461656 : 5521674 : 5581692 : 5641710 : 5701728 : 5761746 : 5821764 : 5881782 : 5941800 : 600

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Answer:

yes

Step-by-step explanation:

18:6

18/6=3

6/6=1

3:1 is a simpler version of 18:6

I need help finding X

Answers

take both sides and multiply them by each other & it will give you X

A principal was buying T-shirts for his school's chess club and found that the total cost
in dollars could be found by the function f(x) = 9x + 19, where x is the number of
members in the club. If there are at least 8 members on the team but not more than
11, then which of the following statements describes the function?

A. The value of x must be a whole number between 8 and 11 and the value of f(x) must
be a whole number between 72 and 99.

B. The value of x must be a whole number between 8 and 11 and the value of f(x) must
be a whole number between 91 and 118.

C. The values of x and f(x) must both be whole numbers between 91 and 118.

D. The values of x and f(x) must both be whole numbers between 9 and 19.

Answers

I think the answer is C

Seth is using a large shoe box to store his baseball cards. The length of the box is 12 inches, and the height is 6 inches. If the volume of Seth's box is 288 cubic inches, how wide is the box?

Answers

Step-by-step explanation: *First, decide which volume formula to use:     v = lwh

*Next, substitute in for what you do know (leave variable for unknown):  288 = 12 · w · 6

*Then simplify the side of the equation with the variable: 288 = 72 · w

*Now divide each side of the equation by 72 to solve for w:

288 ÷ 72 = w

4 in = w

Help me pls, tysm! I will give brainly if you give me the right answer, tysm! I need help on number 6 btw

Answers

Answer: 96 feet

Step-by-step explanation:

What is the x-value of the solution to this system of equations?
X = 2y-3
4X+9y=-63

A :60/17
B : -9
C : -3
D : -17/4

Answers

1) Plug in for x into the equation
4(2y-3)+9y=-63
8y-12+9y
17y-12=-63
y=-3

2) Plug in for y into the equation
4x+9(-3)=-63
4x-27=-63
+27. +27
4x=-36
-36/4= -9
x=-9


(-9,-3)
Now check by pluging in for x and y and see if the equation is true.
4(-9)+9(-3)
-36 + -27= -63

One kilogram is approximately 2.2 pounds. Write a direct variation equation that relates x kilograms to y pounds.

Answers

Answer:

2.2y=1x or just x

Step-by-step explanation:

Answer: y=2.2x

Step-by-step explanation:

During a weekend, the manager of a mall gave away gift cards to every 80th person who visited the mall.

On Saturday, 1,210 people visited the mall.
On Sunday, 1,814 people visited the mall.

Answers

What is the question??

Plz help! Due tonight!
During halftime of a football ​game, a slingshot launches​ T-shirts at the crowd. A​ T-shirt is launched from a height of 4 feet with an initial upward velocity of 80 feet per second. The​ T-shirt is caught 41 feet above the field. How long will it take the​ T-shirt to reach its maximum​ height? What is the maximum​ height? What is the range of the function that models the height of the​ T-shirt over​ time?

Answers

Hope this helps. If not i’m so sorry .

Pls help this is sooOOOOOOO annoying!!
(07.06)Number line with closed circle on 9 and shading to the left.

Which of the following inequalities best represents the graph above?

a > 9
a < 9
a ≤ 9
a ≥ 9

Answers

Answer:

a ≤ 9

Step-by-step explanation:

Closed circle means ≤ or ≥

Shading to the left means left direction < or ≤

The inequality sign that has both is: ≤

a ≤ 9

Answer:

The answer is C

Step-by-step explanation:

I took the test and I got it right

Ahh i hate math fr someone help

Answers

i think C but probably try to find something to back it up
All you gotta do is divide the pound by the cost

SOMEONE PLEASE HELP I'VE BEEN ASKING FOR DAYS NOW WITH SCALE FACTOR!!!!! I will give brainliest if right!!!!!!

Answers

Answer:

It has been answered for you

See this:

https://brainly.com/question/23012157

What is the area of one of the triangular faces? in 2 4 in. 3 in. 7 in. 7 in. 5 in. 4 in. 5 in.​

Answers

Answer:

55

Step-by-step explanation:

MATH PLEASE HELP!! HELP BADLY NEEDED....

Answers

Corresponding angles- a, d, h, l and s
Alternate interior- c, f, i, o, and t
Same side interior- e, g, k, m, and p
Alternate exterior- n, q, r
• for j and b I’m not sure

(-3)=−22−3+11
EVALUATE

Answers

Answer:

− 3 = − 14

Step-by-step explanation:

Hope this helps !

Which describes the cross section of the square prism that passes through the vertices A, B, C, and D shown below?
A square prism. The front left points are labeled A and D. The back right points are labeled B and C.
a rectangle
a square
a kite
a trapezoid

Answers

A trapezoid

~ hope this helps!

Answer:

its not that i got it wrong

Step-by-step explanation:

Mason rolls one dice 99 times. How many times can he expect to roll an odd number
greater than one? (Hint: First find Plodd # > 1))

Answers

A die is six sided, there are 2 numbers both odd and greater than one, so 2/6, 2/6 x 99 is 33.

I need this answer I’ll give brainliest

Answers

Replacing x with 1 and y by 11:
1^6 equals 1 and 11^2 equals 121
So 1+ 121
=122

What is the area of this tile

Answers

Answer:

12 in^2

Step-by-step explanation:

Answer: 12in^2

Step-by-step explanation:

Mother put 22 apples in each basket. How many baskets did she use for 390 apples?

Answers

Answer:

To find the no. of baskets used to put 390 apples we have to divide 390/22  which is 17.7272727273,

so to put 390 apples we need approximately 18 baskets.

hope this answer helps you...

answer: 17.72
solution: probably 17 bc there’s not enough for 18

Kwans beginning account balance was $20. his ending balance is $0. what integer represents the change in his account balance from beginning to end?

Answers

-20

An integer is any whole number, negative or positive, and since Kwan lost 20 dollars, the answer is -20.

Please help I’ll give brainliest

Answers

Answer:

c

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

This hanger is in balance. There are two labeled weights of 4 grams and 12 grams. The three circles each have the same weight. What is the weight of each circle, in grams?

Answers

Answer:

8/3 gram

Step-by-step explanation:

Since the hanger is said to be in balance, then the weight on the right balances the weight on the left ;

Right hand side = Left hand side

12 = 4 + x + x + x

12 = 4 + 3x

12 - 4 = 3x

8 = 3x

8/3 = 3x / 3

x = 8/3 gram

What is the area of the triangle?
24
7
25
units2

Answers

A = 24 + 7 + 25 = 56

eight thousand eight and eight tenths in standard form help plz

Answers

Answer:

8,088.8

Step-by-step explanation:

Right will be marked brainlist

Answers

Answer:

the answer is 3,107.21

The answer to that question is that one

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Answers

Answer:

[tex]15c - 1[/tex]

Step-by-step explanation:

[tex]3(5c + 3) - 10[/tex]

Apply the distributive property.

[tex]3(5c) + 3 \times 3 - 10[/tex]

Multiply 5 by 3.

[tex]15c + 3 \times 3 - 10[/tex]

Multiply 3 by 3.

[tex]15c + 9 - 10[/tex]

Subtract 10 from 9.

[tex]15c - 1[/tex]

Hope it is helpful....

Prince Ivan rides Grey Wolf at a constant speed from King's Castle to the Magic Apple Garden in 5 hours. On their return trip to King's Castle, Grey Wolf runs at that original constant speed for the first 36 km. Then he runs the rest of the way 3 km/h faster. What was Grey Wolf's original speed if the return trip took 15 minutes less than the trip from King's Castle to the Magic Apple Garden?

Answers

Answer:

48 and 9

Step-by-step explanation:

36/x + 5x-36/x+3 = 5-0.25

Answer:

9 and 48 km/hr

Step-by-step explanation:

The Formula [tex]S=\frac{D}{T}[/tex] along with its variations are used

Let's say for the initial ride, the speed was x. Because the time was 5 hours, the distance was 5x km. Now for the return. For the first part, the speed remains x but our distance is 36km. So, our time is 36/x hours. For the second part, the speed is x+3 but our distance is 5x-36 (The total minus the distance of the first part.) So, our time is [tex]\frac{5x-36}{x+3}[/tex]. Now we have the equation [tex]\frac{36}{x} + \frac{5x-36}{x+3}=5-\frac{1}{4}[/tex] as our times add up to 5 hours minus 1/4 of and hour. Solving, we get x=9, x=48.

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