There was some gas in the tank. I added 13.3 gallons to it. After that, there was 21 gallons. How many gallons were in the tank at the start?

Answer: D: ONE TWO, ONE TWO, ONE TWO, ONE TWO

Step-by-step explanation:

Answer:

This is correct! answer is (2 1/2, 10) and (3/12)

Step-by-step explanation:

Answer: [tex]12x-15[/tex]

Step-by-step explanation:

Given: Sunny earns $12 per hour delivering cupcakes. She worked for x hours this week.

The total earning for this week = [tex]12x[/tex]

Also, she was charged $15 for a late delivery on Tuesday.

It means, The total earning for this week =[tex]12x-15[/tex]

So if Sunny earns $12 per hour delivering cupcakes. She worked for x hours this week and was charged $15 for a late delivery on Tuesday then her earning for this week = 12x-15

Answer:

4 gallons of water should be added in 10% saline solution.

Step-by-step explanation:

Let x gallon of water is added in one gallon of 10% saline solution.

Therefore total volume of 10% saline solution will become (1 + x) gallons

Since concentration of water is 0% so equation will be

0.10(1) + 0(x) = .02(1 + x)

0.10 = 0.02(1 + x)

1 + x = [tex]\frac{0.10}{0.02}[/tex]

x + 1 = 5

x = 5 - 1

x = 4 gallons

Therefore, 4 gallons of water should be added to 10% saline solution to create 2% solution.

The equation of the graph is y = 3x + 9 in slope-intercept form and 3x - y = -9 in standard form.

The equation of the graph can be written in slope-intercept form (y = mx + b) and standard form (ax + by = c).

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Dahlia could have raised both the coefficient and variable to the power of 4

Given the exponential expression as shown below;

(3t)^4

This shows that we are to multiply 3t in 4 places to have;

(3t)^4 = (3t) * 3t * 3t * 3t

(3t)^4 = 3^4 * t^4

(3t)^4 = 81t^4

This shows that Dahlia could have raised both the coefficient and variable to the power of 4

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Answer:

B. Score(3)

Step-by-step explanation:

Given,

Bella's score on a spelling test is a function of the number of hours she studies.

Let x represents the number of hours and S represents her score after x hours,

Thus, her scoring after x hours = S( x )

If she studies for 3 hours,

That is, x = 3,

Then her score would be S(3) or we can say that score(3).

Hence, option 'B' is correct.

Answer:

m ≥ 82 + 32w

m ≥ 402

Step-by-step explanation:

Here, w represents the number of weeks and m represents the total amount in the account after w weeks,

The amount of money saved in each week = $ 32,

So, the total amount saved after weeks = 32w dollars,

Since, the original amount in the account = $ 82

The total amount in the account = 82 + 32w

Thus, the required inequality would be,

m ≥ 82 + 32w

If w = 10,

The amount in the account after 10 weeks = 82 + 32(10) = 82 + 320 = $ 402

⇒ m ≥ 402  

That is, the closed circle on 402 and shaded right in the number line ( shown below )

The algebraic expression for 'four less than three sevenths of y' is (3/7)y - 4. This involves finding three sevenths of y and then subtracting four.

The phrase 'four less than three sevenths of y' is asking us to first find three sevenths of y, and then subtract four from that number. In algebra, this is represented as (3/7)y - 4. The expression (3/7)y means 'three sevenths of y', and the '- 4' indicates we are finding 'four less than' this quantity.

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The value of x will be equal to 21.

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

The given expression will be solved as below:-

√(x-5) + 7 = 11

√(x-5)  = 11 -7

√(x-5)  = 4

x - 5 = 4^2

x - 5 = 16

x = 16 + 5

x = 21

Therefore, the value of x will be equal to 21.

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Answer:

Step-by-step explanation:

we are given the equation a+b-c=180

Now to solve it for c we need to isolate the c

first step can be addition of c to  both side

a+b-c+c=180+c

a+b=180+c

now in second step we subtract 180 from both sides to get

a+b-180=180+c-180

a+b-180 = c

c= a+b-180

Final answer:

Harvey has 112 marbles distributed equally across seven trays. Each tray holds 16 marbles, therefore, on three trays, Harvey will display a total of 48 marbles.

Explanation:

Harvey has 112 marbles in his collection and uses seven trays to hold all of the marbles. To find out how many marbles Harvey will display on three trays, we need to divide the total number of marbles by the total number of trays to find out how many marbles each tray holds.

First, divide 112 marbles by 7 trays to find out how many marbles go on each tray. The calculation is as follows:

112 marbles ÷ 7 trays = 16 marbles per tray

Now that we know each tray holds 16 marbles, to find out how many marbles are displayed on three trays, we multiple the number of marbles per tray by the number of trays:

16 marbles per tray × 3 trays = 48 marbles

Therefore, Harvey will display 48 marbles on three trays.