Rewrite the sum 15y + 4x using the Commutative Property of Addition.

Answer:

10 points

Step-by-step explanation:

since they only said 5 days and each day 2 points drop.

1 day = 2 points

5 days = 2 x 5 = 10 points

Answer:

12^2 = 144 and 13^2 = 169

So, the answer is 12 and 13

Step-by-step explanation:

Answer and Step-by-step explanation:

The answer would be the last answer choice.

[tex](n^{-3} )^{6}[/tex]

Exponents that are the being raised by another exponent get multiplied, so 6 times -3 is -18.

When a number/variable has a negative exponent, the number/variable will be put under 1, and the exponent will change to be positive.

#teamtrees #PAW (Plant And Water)

Answer:

0.01, 1%, or 1/100

Step-by-step explanation:

These are all the same.

Answer:

A

Step-by-step explanation:

'A' because it asks about pros and cons.

Answer:

80,66

Step-by-step explanation:

70 + 82 + 90 = 242

for average: you have 3 tests, so 242÷3 = 80,66667

Answer:

Independent: Time, Dependent: Distace

Step-by-step explanation:

The x Axis is usually independent, it lays on the ground. The Y-axis depends on the x-axis to hold it up up. < little way to remember

Answer:

-$82

Step-by-step explanation:

-402 + -390 = -792

-1038 -  -792 = -246

Since you are trying to find it for the remaining 3 months you divide by 3.

-246/3 = -$82

Answer:

Point Y

Step-by-step explanation:

I have attached a picture of me showing which point lies on the bisector since it says to bisects <C of polygon ABCDE.

Hope this helps, thank you :) !!

Answer:

Y=-x^2 -2x

Step-by-step explanation:

First distribute -1

Y=-x+0(x-2)

Foil and you get

y= x^2-2x

This is in standard form

Answer:

x = - 2, y = 1

Step-by-step explanation:

Comparing both the equations,

→ y = y → x + 3 = - 2x - 3

=> x + 3 = - 2x - 3

=> x + 2x = - 3 - 3

=> 3x = - 6

=> x = - 6/3 = - 2

Substitute the value of x in any of these:

=> y = x + 3 = - 2 + 3 = 1

Answer:

Step-by-step explanation:

If a solution exists for the system of equations y=y so we can say

x+3=-2x-3 Add 2x to each side

3x+3=-3 Subtract 3 from each side

3x=-6. Divide each side by 3

x=-2, since y=x+3

y=-2+3

y=1

So the solution to the system of equations is the point (x,y)=(-2,1)

Answer:

X axis is on the left of the Coordinates (x,y) and Y axis is on te right

X goes sideways

Y goes Vertical

Step-by-step explanation:

Answer:

90 inches

Step-by-step explanation: 7 feet*12 inches= 84 and .5 feet*12 inches= 6.

84 inches+ 6inches=90inches

Answer: 1.2ft × 12

= 14.4"

Step-by-step explanation:

GIVE ME DA BRAINS

Answer:

8/3 or 2 2/3 gallons of paint

Step-by-step explanation:

If 2/3 of paint covers 1/4 of the wall, you must multiply 2/3 by 4 to get 4/4 (the whole wall).

2/3 x 4 = 8/3 or 2 2/3

Answer:

800

Step-by-step explanation:

Set up your proportion first (6/20 = 72/x). Then, square 6 and 20 (36/400 = 72/x). Cross multiply and divide (36x = 28800). Divide 28800 by 36 and that gives you 800 as your answer.

Answer:

Step-by-step explanation:

There are nine numbers on the spinner with 4 even and 5 odd numbers. Flipping a tail is just 1/2 so

P(ETO)=(4/9)(1/2)(5/9)

P(ETO)=20/162

P(ETO)=10/81

Answer:

37.5

Step-by-step explanation:

First you have to realize that these are similar triangles.

You can do a easy cross multiplication with these types of questions by forming an equation with the similar angles.

put the smaller above the decimal and the bigger one below like this.

[tex]\frac{8}{25}[/tex]=[tex]\frac{12}{x}[/tex]

Now cross multiply

8x=300

x=37.5

Answer:

Ship one is closer to the coast guard

Answer:

yes

Step-by-step explanation:

Answer:

Yes.

Step-by-step explanation:

x + 4y = 13

 x - y = 3              Subtracting:

0 + 4y - (-y) = 13 - 3

5y = 10

y = 2.

Plug y = 2 into the second equation:

x - 2 = 3

x = 5.

Answer:

450

Step-by-step explanation:

One rotation would be 360 and a quarter of 360 is 90 so 360+90=450

Answer:

10 sections

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

i converted mixed number into decimals:

2 1/2 = 2.5

1/4= .25

Then 2.5/.25= 10

Answer:

1/7

Step-by-step explanation:

Answer:

Number of [tex]\frac{1}{3}[/tex] liters required to fill the tank = 27

Step-by-step explanation:

Amount of water needed to fill the tank = 9 liters

Measure of water to fill a vessel = [tex]\frac{1}{3}[/tex] liters

Number of [tex]\frac{1}{3}[/tex] liters vessels required to fill the tank = [tex]\frac{9}{\frac{1}{3}}[/tex]

                                                                                  = 9 × [tex]\frac{3}{1}[/tex]

                                                                                  = 27

Therefore, number of [tex]\frac{1}{3}[/tex] liters required to fill the tank = 27

Step-by-step explanation:

ES6 has a new Set data structure for storing sets of unique objects. However it is based on object references as opposed to value comparisons. As far as I can tell this makes it impossible to have a set of pairs of numbers without stringifying.

For example, typing in Chrome's console (needs Chrome 38+):

> var s = new Set(); < undefined > s.add([2, 3]); < Set {[2, 3]} > s.has([2, 3]) < false <--- was hoping for 'true'

This appears to be by design: since I passed a different array of [2, 3] to has(), it returns false, because although the contents is the same it only looks at object references, and I allocated a new and different array to pass to has(). I would need to store a reference to the original array I passed to add() to check with has(), but this is not always possible. For example if the number pairs represent co-ordinates, I might need to check if the set has [obj.x, obj.y], but this will always return false since it allocates a new array.

The workaround is to stringify the arrays and key on strings like "2, 3" instead. However in something performance-sensitive like a game engine, it is unfortunate if every set access needs to make a string allocation and convert and concatenate number strings.

Does ES6 provide any feature to solve this problem without stringifying, or is there any feature on the horizon with ES7 that could help as well?

javascriptperformancedata-structuressetecmascript-6

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asked Sep 21 '14 at 13:06



AshleysBrain

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3 Answers

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As you've noted [2, 3] === [2, 3] is false, meaning you can't use Set like this; however, is Set really the best option for you?

You may find that using a two-level data structure like this will be better for you

var o = {}; function add(o, x, y) { if (!o[x]) o[x] = {}; o[x][y] = true; } function has(o, x, y) { return !!(o[x] && o[x][y]); } function del(o, x, y) { if (!o[x]) return; delete o[x][y]; // maybe delete `o[x]` if keys.length === 0