Simplify the expression.

( I got 144, but i'm not sure)

Answer:

Step-by-step explanation:

A: The charge of each electron is -1, so the charge of three electrons is -3. Removing something is denoted by a negative sign. The expression that represents the removal of three electrons from each of four atoms is (-3)(-4).

B: (-3)(-4) = (-1)(3)(-1)(4) = (-1)(-1)(3)(4) = 12

The net change in the charge for the group of atoms is 12 (or +12); that is, the charge of the atoms increases by 12.

C: Adding two electrons to each of six atoms results in a net change in charge of (-2)(6). Removing two protons from each of six atoms results in a net change in charge of (2)(-6).

D: (-2)(6) = (-1)(2)(6) = (-1)(12) = -12

(2)(-6) = (2)(6)(-1) = (12)(-1) = -12

E: The products are the same: -12.

F: If the signs of the numbers are the same, the product is positive. If the signs of the numbers are different, the product is negative.

Answer:

A)

The charge of each electron is -1, so the charge of three electrons is -3. Removing something is denoted by a negative sign. The expression that represents the removal of three electrons from each of four atoms is (-3)(-4).

B)

(-3)(-4) = (-1)(3)(-1)(4) = (-1)(-1)(3)(4) = 12

The net change in the charge for the group of atoms is 12 (or +12); that is, the charge of the atoms increases by 12.

C)

Adding two electrons to each of six atoms results in a net change in charge of (-2)(6). Removing two protons from each of six atoms results in a net change in charge of (2)(-6).

D)

(-2)(6) = (-1)(2)(6) = (-1)(12) = -12

(2)(-6) = (2)(6)(-1) = (12)(-1) = -12

E)

The products are the same: -12.

F)

If the signs of the numbers are the same, the product is positive. If the signs of the numbers are different, the product is negative.

solved it on edmentum <3

Answer:

Below

Step-by-step explanation:

1.  50

2.  40

3.  55

4.  39

5.  40

6.  92

Answer:

1. 60 deg

2. 40 deg

3. 65 deg

4. 39 deg

5. 60 deg

6. 88 deg

Step-by-step explanation:

hope this helps

Answer:

(3 + 5i) – (2 + i).

Step-by-step explanation:

Answer:

first one is D. (3 + 5i) – (2 + i) second is C. –12 – 10i

Step-by-step explanation:

this is correct for the assignment portion of Edge

Answer:

Step-by-step explanation:

Given the various variance of normal body temperature expressed by the function f(t) = |98.6-x| where x is persons current body temperature in degree Fahrenheit.

If medical professional says that healthy individual cannot have a variance of no more than 0.5F, we can get the variance by substituting x = 0.5 into the modeled function as shown;

Note that the function can either be negative or positive because of the modulus sign

If x = 0.5

For positive value,

f(0.5) = 98.6-0.5

f(0.5) = 98.1

If the function is negative

f(0.5) = -(98.6-0.5)

f(0.5) = -98.6+0.5

f(0.5) = -98.1

The variance for healthy individual will be expressed as -98.1≤f(x)≤98.1

Answer:

Plan C

Step-by-step explanation:

sorry if i'm wrong

The probability of rolling any number on a 6-sided die is 1/6.

The probability of rolling a 4 = 1/6

The probability of rolling a 6 = 1/6

The probability of rolling 4 and then 6 = (1/6) * 1/6) = 1/36

Answer:

no solutions

Step-by-step explanation:

Answer:

x < -8, third from top option in the picture.

Step-by-step explanation:

5(2x - 4) < -100

10x - 20 < -100

10x < -80

x < -8

Answer:

3rd option from the top (open circle arrow going left)

Step-by-step explanation:

5(2x-4) is less than - 100

5 times 2x is 10x and 5 times - 4 is - 20 so,

10x - 20 is less than - 100

now do inverse operations to isolate x, add 20

- 20 plus 20 is 0 and -100 plus 20 is - 80

10x is less than -80

divide both sides by 10 and you get,

x is less than - 8

Answer:

d. y=2x+6

Step-by-step explanation:

the slope is 2 because it goes up 2 over 1 and the y-intercept is 6 because that is where the line intercepts the y-axis

Answer:

D

Step-by-step explanation:

D

Answer:

A(x) = x(200-x)

Step-by-step explanation:

400 feet of fencing to enclose a rectangular dog exercise pen means the perimeter of rectangle is 400 feet

If x is length and y is breadth. Perimeter is given by :

P = 2(x+y)

400 = 2(x+y)

⇒ (x+y) = 200 .....(1)

y = 200-x

Area of a rectangle is given by :

A = xy

A(x) = x(200-x)

Hence, the area as a function of length of rectangle is x(200-x).

Answer:

please spare me

Step-by-step explanation:

Answer:

75 cents or $0.75

Step-by-step explanation:

1. We see that Shirley takes the train to work and back home. This means she takes the train twice a day. We also see that she uses the train five times a week. So step 1, multiple 5 and 2.

5x2 = 10

2. She pays $25 for a weekly train pass. Divide 25 and 10.

25/10 = 2.5

3. Now, we compare how much money she saved. Subtract 3.25 and 2.5.

3.25-2.5 = 0.75

4. This means she saved 75 cents by purchasing the weekly pass.

===================================================

Explanation:

The remainder theorem says that if we divide some polynomial p(x) over (x-k), then p(k) is the remainder.

The expression x+1 is the same as x-(-1). Comparing this to x-k shows k = -1.

So we'll need to evaluate p(-1)

To do so visually, draw a vertical line through -1 on the x axis. Make sure this vertical line crosses the blue curve at some point, which I'll call point A.

From point A, draw a horizontal line to the y axis. You should reach y = 3.

This is all shown in the diagram below.

In other words, the point (-1,3) is on the blue curve, and p(-1) = 3.

So the remainder is 3.

Answer:

3

Step-by-step explanation:

Answer:

9. y=-2x+1

10. y=3/2x-2

Step-by-step explanation:

could u vote me brainliest plz? thx :)

Answer:

FREE POINTS!!!

Step-by-step explanation:

Answer:

4,000 dollars i think

Step-by-step explanation:

because in this case you have have to divide and multiply 20/5 and 4x5

Answer: 17500

Step-by-step explanation: 7000 + 15000 + 22000 + 23000 +38000/ 6

The difference between a collection of numbers' highest and lowest values is known as the range.

The mean(average) salary exists 17500.

The range salary exists 35000.

Range, which shows statistical dispersion, is the size of the smallest interval in descriptive statistics that encompasses all the data. It is best suited to capturing the dispersion of tiny data sets because it only depends on two observations.

The difference between the highest and lowest values for a given data collection is the 35000in statistics. For instance, the range will be 10 - 2 = 8 if the given data set is 2, 5, 8, 10, and 3. As a result, the range may alternatively be thought of as the distance between the highest and lowest observation.

The salaries of six employees are $3000, $7000, $15,000, $22,000, $ 23,000, and $38,000.

a) Mean = Sum of terms / Number if terms

substitute the values in the above equation, we get

= 7000 + 15000 + 22000 + 23000 + 38000/ 6

= 17500

Therefore, the mean(average) salary exists 17500.

b) The maximum is $38,000 and the minimum is $3000 then the range exists

Range = maximum - minimum

substitute the values in the above equation, we get

Range = $ 38,000 - $ 3000

= $ 38,000 - $ 3000

= $ 35000

Therefore, the range salary exists 35000.

To learn more about range refer to:

brainly.com/question/26098895

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Answer:

-9or

Step-by-step explanation:

im not sure, i reccomend using a slope calculator

Answer:

90

Step-by-step explanation:

7 x 12 + 6

Answer:

6/142 > 4/136

Step-by-step explanation:

6/142 = 0.04225352113

4/136 = 0.02941176471

Answer:

6/142

Step-by-step explanation:

because 6/142 in percentage form is .04225 and 4/136 in its' percentage form is .0294. Basically if you don't know the answer then just change it from a fraction to a percent to see it better.

Answer:

4

I multiplyed them all by two and then added them to see f it equaled 12 and it did

Moving downstream (with the current), the boat moves at a rate of (252 mi)/(12 h) = 21 mph. Upstream (against the current), it moves at a rate of (252 mi)/(84 h) = 3 mph.

When traveling downstream, the boat's speed is the sum of its own speed in still water and the speed of the current. It's the same going upstream, but the boat and current move in opposite directions. Let b and c denote these speeds, respectively. Then

downstream: b + c = 21 mph

upstream:      b - c = 3 mph

Adding these equations eliminates c and lets us solve for b :

(b + c) + (b - c) = 21 mph + 3 mph

2b = 24 mph

b = 12 mph

Now solve for c :

12 mph + c = 21 mph

c = 9 mph

Answer:

x = [tex]\frac{1}{13}[/tex]

Step-by-step explanation:

Bases are the same. Move to exponents and set them equal to.

x = [tex]\frac{1}{13}[/tex]

Answer:

83

Step-by-step explanation:

Answer:

83

Step-by-step explanation:

Not sure how to explain how to divide these, but the answer is 83.

I'm sorry I couldn't explain, but please have an amazing day C:

Answer:

16384

Step-by-step explanation:

=4^4*4^3

=(4*4*4*4)*(4*4*4)

=4*4*4*4*4*4*4

=4^7

Answer:

[tex]10^{4}[/tex]

Step-by-step explanation:

square has 4 sides each side is 10cm

The area of a square with a side length of 10 cm written in exponent form is  10² cm².

The perimeter of any given 2D figure is the sum of the lengths of all the sides.

We know the area of a square is a product of its two sides.

Assuming the length of a side of a square is a unit.

∴ The area of the square is (a×a) sq units,

and we know that a×a = a¹×a¹ = a¹⁺¹ = a².

So, given a square has a side length of 10cm.

∴ The area of the square will be (10×10) sq cm.

= 10² cm².

learn more about circumference here :

https://brainly.com/question/28757341

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Answer:

X would have to be any number greater than 6.25

Step-by-step explanation:

8*7=56, 8*8=64, and so on.

Answer:

Percentage Calculator: 0.62 is what percent of 100? = 0.62.

Step-by-step explanation:

Hope this helps!!!

Answer:

well there cant be 2 decimal points in a decimal, but .062 is 6.2% and 0.62 is 62%

Step-by-step explanation: