Explain how to calculate these mentally

a. 15 is what percentage of 30
b. 3 is what percentage of 12
c. 6 is what percentage of 10

Answer:

33.25 = 33 1/4

Step-by-step explanation:

times 4 3/4 by 7

4 3/4 X 7 = 33.25 = 33 1/4

Step-by-step explanation:

please don't understand the question. will be happy if you take a shot of it.

Thanks

9514 1404 393Answer:  A. 3+ (-4) = -1Step-by-step explanation:The arrow indicates a subtraction of 4, or an addition of -4. The only equation containing such a subtraction or addition is choice A.

Answer:

525

Step-by-step explanation:

If it's just asking to find the average of heads then times it by 20 then just do 32+28+21+24 to get 105 and divide it by 4 to get 26.25 then times it by 20 since this is the average of 50 throws and it's asking for the average of 1,000 throws which is 525

Answer:

1234567891011121314151617

Answer:

where is the question?

Step-by-step explanation:

unit rate always equals k=y per x            y/x                                          

Answer:

Hello friend!

Step-by-step explanation:

What i did to get these answers is divide the total cost by the # of tickets

For lakers is 33! $33 dollars for 7 tix :)

forr knicks is 39! $39 dollars for 2 tix!

Sorry if im wrong :( Hope i helped ya

Answer:

If Janelle was at sea level then the altimeter would read 0. If she was above sea level then the altimeter would read above 1. If she was below sea level then the altimeter would read below or at -1.

Step-by-step explanation:

This is similar to negative and positive numbers.

The position of an object relative to sea level can be deduced using the positive and negative signs. Hence,

An object which is exactly at sea level is interpreted to at the 0 distance.

Points below sea level always takes a negative sign, hence, 4 meters below sea level is written as - 4 meters

Points above sea level always takes a positive sign, hence, 4 meters above sea level is written as +4 meters

Learn more : https://brainly.com/question/23105648

Answer:

A. 100.48

Step-by-step explanation:

2(pi) 16

c= 2pi(radius)

Answer:

8⁵. cm

Step-by-step explanation:

because we plus 1 ⁵q and 7cm together it gives us that answer

I hope it's correct

Answer:

Option #4

Step-by-step explanation:

Expand option #4

=-3(1-2x)

=-3 -2x*-3

=-3+6x which is what your original equation was.

Answer:

it cost $7 for each chair and $9 for each table

Step-by-step explanation:

when 5 chairs and 6 tables were rented, the total cost was $53, which means that the 5 chairs cost $35 (5x$7) and the 6 tables cost $18 (6x$9). Similarly, when 3 chairs and 2 tables were rented, the total cost was $21, which means that the 3 chairs cost $21 (3x$7) and the 2 tables cost $12 (2x$9).

Answer:  90° clockwise rotation

Step-by-step explanation:

The rules for rotation are below:

90° clockwise rotation = (x, y)→(y, -x)

270° clockwise rotation = (x, y)→(-y, x)

180° counterclockwise rotation = (x, y)→(-x, -y)

90° counterclockwise rotation = (x, y)→(-y, x)

Let's take point B. Point B's coordinates are (3, -2). Point B' is (-2,-3). -x would be -3, and y stays the same.

Therefore, the answer is 90° clockwise rotation.

For additional resources, check out "Rotation Rules 90, 180, 270 degrees" by Math in Minutes.

Good luck!

Answer:

2.9 kg

Step-by-step explanation:

If you round 2.915 to the nearest tenth, it would be 2.9. this is because the number to the right of the 9 (1) is below 5.

The amount of flour after rounded to the nearest tenth will be 2.91 kg.

Rounding numbers refers to changing a number's digits such that it approximates a value. The provided number is more simply represented by this value. For instance, 700,000 rather than 698,869 could be used to express a town's population.

Given that;

Organic Whole Wheat Flour Sells in bags Weighing 2.915 Kg.

Now,

Since, Organic Whole Wheat Flour Sells in bags Weighing 2.915 Kg.

We know that;

When we round to the nearest tenth we see the right digit of tenth place if it is less than 5 then write same as number but if the number is greater than 5 then add one on the tenth place number.

Hence,

The amount of flour after rounded to the nearest tenth = 2.9

Because,  1 < 5

Thus, The amount of flour after rounded to the nearest tenth = 2.9 kg

Learn more about the rounding number visit:

https://brainly.com/question/1620496

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Answer:

15 x the number of cars

Step-by-step explanation:

Answer:

9 x 5.16 is 46.44

Step-by-step explanation:

Answer:

494

Step-by-step explanation:

380 * 1.3 = 494

Answer:

Step-by-step explanation: the first eqation is inthe first box that says 1, the second eqation goes to the 1/4 bx, the third one goes in the 4 box and the last does in the box 1. i promise its right i did it on my calculator and i learned it recently and did well.

Answer:

3 x 6

Step-by-step explanation:

Its asking, how did Koda get this answer.

Think about it, on the left u have 3 outside and on top you have 6 outside connect those 2 and you get 18 as your answer.

Don't get confused its just showing step by step on how you can do it and why.

Answer is 25 degrees.

Answer:

k=12

Step-by-step explanation:

Top left angle is 84 degrees also, due to alternate interior angles cut by the transveral.

2 sides are congruent, leaving bottom left corner angle also 84 degrees.

Write an equation to solve for k:

84+84+k=180

simplify

168+k=180

subtract 168 from both sides

k=12

Hope this helps! :)

Answer:

251.33

Step-by-step explanation:

Answer:

Step-by-step explanation:

3.1313109

Answer: the answer should equal 3.131

Step-by-step explanation: as this is the measurement of the longest line in right rectangular prism.

Please got brainliest

No the given relation is not a function because for one input we are getting two different values of output which negates the definition of the function.

A relation is said to be a function when each and every element of domain has a unique and distinct image means we will get only one output per input.So

Hence the given relation is not a function.

To know more about relations and functions please check:

https://brainly.com/question/28989903

The given relation is not a function because for each input (x-value), there is not exactly one output (y-value).

In a function, each input (x-value) should have only one corresponding output (y-value). However, in this relation, the input value of 1 has two different output values: -2 and 3. Therefore, it violates the definition of a function.

To illustrate this, let's look at the points (-2, 0), (1, -2), and (1, 3). The x-value of 1 appears twice in the relation, but it has two different y-values associated with it. This means that for the input value of 1, there is not exactly one output value, which is why the given relation is not a function.

In conclusion, the relation is not a function because for each input there is not exactly one output.

Answer:

2/3 of 2 is one and one-third (1 1/3)

Explanation:

To find 2/3 of 2, you need to multiply those two numbers

Answer:

\(f^{-1}\left(f(576)\right)=\boxed{576}\)

\(f^{-1}(-7)+f(-7)=\boxed{13}\)

Step-by-step explanation:

The inverse of an invertible function with the domain of all real numbers is obtained by reflecting the original function across the line y = x, which swaps the input and output values of the function. Therefore, (x, y) → (y, x).

Given table:

\(\begin{array}{lrrrrrr}\vphantom{\dfrac12}x&-7&11&-13&6&5&-9\\\cline{1-7}\vphantom{\dfrac12}f(x)&7&12&8&-7&13&5\end{array}\)

Inverse function:

\(\begin{array}{lrrrrrr}\vphantom{\dfrac12}x&7&12&8&-7&13&5\\\cline{1-7}\vphantom{\dfrac12}f^{-1}(x)&-7&11&-13&6&5&-9\end{array}\)

If we have a function f(x), the inverse function is denoted as f⁻¹(x), and it has the property that f⁻¹(f(x)) = x for all valid inputs x in the domain of f(x).

Therefore:

\(\large\boxed{f^{-1}\left(f(576)\right)=576}\)

The value of f(-7) is the value of f(x) when x = -7. Therefore, reading from the original table, f(-7) = 7.

The value of f⁻¹(-7) is the value of f⁻¹(x) when x = -7. Therefore, reading from the inverse function table, f⁻¹(-7) = 6.

Therefore:

\(\large\boxed{\begin{aligned}f^{-1}(-7)+f(-7)&=6+7\\&=13\end{aligned}}\)

Answer:

38.3° C

Step-by-step explanation:

use formula (°Cx9/5) + 32 = F

Answer: y=x-20

Step-by-step explanation:

(90,70) will be x1,y2. (30,10) will be x1,y1. Put these values into the slope formula, which is y2-y1/x2-x1. 70-10/90-30. 60/60=1. The slope is 1. Now to find the slope-intercept equation, use point slope form which is y-y1=m(x-x1). y-10=1(x-30). Distribute the 1 to the terms in the parenthesis. y-10=x-30. Add 10 to both sides to eliminate 10. y-10+10=x-30+10. y=x-20.