0.26÷1.56 ...........................................................................................

Answer:

The correct option is C: the isotope of iodine contains 81 neutrons.

Step-by-step explanation:

The mass (A) of the iodine isotope is given by:

[tex]A = Z + N[/tex]

Where:

Z: is the number of protons

N: is the number of neutrons

For iodine Z= 53, so if A = 134 the number of neutrons is:

[tex] N = A - Z = 134 - 53 = 81 [/tex]

Therefore, the correct option is C. The isotope of iodine contains 81 neutrons.

I hope it helps you!

Answer:

I

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

So it’s asking for the ratio for a diameter of 7.2 so if you look at the table 22.61 is the one next to it. So it’s A because it says circumference to diameter not diameter to circumference

Answer:

circumfrence = 108

Step-by-step explanation:

Radius = half the circumfrence

radius * 2 = circum.

54*2 = 108

108 = circum

Answer:

5=2x+4

5-4=2x

1=2x

x=1/2

Answer:

if f(x)=2x+4

Then f(5)=2•5+4=14

The answer is 14

Answer:

0.8 = 80%

Details:

To write a number as a percetage, just multiply the decimal value by 100. In this case we have: 0.8 × 100 = 80% (answer).

➥ The ease way:

1) Shift the decimal point two places to the right:

0.8 → 8 → 80.

2) Add a percent sign: 80%

Answer: 80%

Answer:

8% sorry if I'm wrong but I'm pretty sure

Answer:

The slope is 7/5

Step-by-step explanation:

Here, we want to find the slope of the line

We use the slope equation

m = (y2-y1)/(x2-x1)

m = (35-70)/(25-50) = -35/-25 = 7/5

what it means is that the rate of change of the number of red drops to number of blue drops to form the purple color is in the ratio of 7 to 5

Or simply put

To form a purple color, add 7 part red to 5 parts blue drops

Answer:

48/63

Step-by-step explanation:

16/21 in fraction form

Answer:

-16/21

Step-by-step explanation:

Multiply the numerators together then the denominators. (-48/63)

Reduce Divide each side by 3 (-16/21)

Answer:

B). to show the general tendency of the points in a scatterplot

Step-by-step explanation:

The purpose of a regression line is to show the general tendency of the points in a scatterplot option (B) is correct.

A regression line is a graph that illustrates the pattern of a group of statistics. In other words, it shows the data's best pattern.

It is given that:

The regression line is a line of best fit.

From the definition of the regression line, line is a graph that illustrates the pattern of a group of statistics and to show the general tendency of the points in a scatterplot.

Thus, the purpose of a regression line is to show the general tendency of the points in a scatterplot option (B) is correct.

Learn more about the regression line here:

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Answer:

-4

Step-by-step explanation:

its negative because it is decreasing from left to right and 4 because it goes down 4 over one not down one over four

Answer: B : -1/4

Step-by-step explanation: The line is going down to the right which is a negitive slope. So that takes out the options B and C. Then to find the slope you find a point and go over one down four, therefour -1/4. Hope This Helps!

Answer:

b

d

Step-by-step explanation:

Answer: C. about 3%

Step-by-step explanation:

In 2006 , Number of dogs in U.S. dogs  = 72 million

In 2010, Number of dogs in U.S. dogs  = 70 million

The percent decrease in the number of dogs in U.S. Homes from 2006 to 2010  =

[tex]\dfrac{\text{Change in number of dogs}}{\text{Number of dogs in 2006}}\times100\%\\\\=\dfrac{(72-70)\text{ million}}{70\text{ million}}\times100\%\\\\=\dfrac{2}{7}\times10\%\approx3\%[/tex]

So, the percent decrease in the number of dogs in U.S. Homes from 2006 to 2010 was about 3%.

Hence, the correct option is C. about 3%

Answer:

you have to give more explanation as right now the equation is unsolvable

Step-by-step explanation:

Answer:

If it's hypotenuse for the side angle I think the answer is 25

Step-by-step explanation:

[tex]\sqrt[n]{15^{2} + 20^2} = 25 If you're doing hypotenuse[/tex]

Answer:

x = 7 (i think..)

Step-by-step explanation:

-3 (4 - 3x) = 5x + 16

* multiple -3 to each number in the parenthesis

-12 + 9x = 5x + 16

* add 12 to both sides to cancel it and combine like terms on the other side

9x = 5x + 28

* subtract 5x from both sides to cancel it out and combine like terms

4x = 28

* divide 4 from both sides to get x alone

x = 7

Answer: Negative (negative 10)

Step-by-step explanation:

Given that:

- 20, blank, A, B, 0, 5, C, blank, D in Increment of 5

-20, - 15, - 10, - 5, 0, 5, 10, 15, 20

The point A on the number line is - 10 ;

The opposite of point A : will be

- (point A) = - (-10)

The opposite of point A should be (10) which is the equivalent point to the right of the number line and can be represented as - (-10)

Answer:

-(-10)

Step-by-step explanation:

the other person is correct

edge 2020/2021

Answer:

x=15

Step-by-step explanation:

[tex]-109+9x=86-4x\\ +109+4x=+109+4x\\13x=195\\x=15[/tex]

add 109 to both sides and add 4x to other sides

divide 13 by 195

Answer:

Is there a picture or choices?

Step-by-step explanation:

Answer:

(5,4) and (3,4)

Step-by-step explanation:

A line segment has 2 end points which can be denoted as:

[tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex]

When this line segment intersects at y.

This means that the coordinate on the y axis is the same at both end points

i.e.

[tex]y_1 = y_2 = y[/tex]

[tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] becomes [tex](x_1,y)[/tex] and [tex](x_2,y)[/tex]

x1 and x2 can be any value but the y value must remain unchanged

Using the above analysis, a possible coordinate is:

[tex](5,4)[/tex] and [tex](3,4)[/tex]

Note that there are as many answers as possible as long as the coordinate pair satisfy is of the form [tex](x_1,y)[/tex] and [tex](x_2,y)[/tex]

Take for instance, another possible pair is:

[tex](1,-3)[/tex] and [tex](0,-3)[/tex]

Answer:

y=4x-3

Step-by-step explanation:

We're given that the equation is linear (a line), so it must be in the form y=mx+b. We're also given that it contains the points (0,-3) and (1,1).

Plugging the values of the x and y coordinates in that first point, we get the equation -3=m*0+b, simplifying to -3=b. Therefore, the b-value is -3.

Next, we can plug in the values from the second point to get the equation 1=m*1-3, which simplifies to 1=m-3. Adding 3 to both sides, we get m=4. Therefore, the equation of the line is y=4x-3.

Note that -3 is the value where the line intercepts the y-axis, which means -3 is known as the y-intercept. The value of b is always the y-intercept.

Answer:

The equation is

15x = 610

Step-by-step explanation:

A dime is 10 cents while a nickel is 5 cents

$6.10 is same as 610 cents

Let the number of dimes and number of nickels be x

10x + 5x = 610

15x = 610

Answer:

1904 cookies

Step-by-step explanation:

2176/8=272

272 is how many cookies a shop gets a day

272x7=1904

Hope this helps

Answer: x = -7 and x = 2

(x,y)

look at the 2 that y=1

Using the graph the input values that correspond with f(x) = 1 is x = -7 and x = 2.

A graph is a visual representation of data or information, often used to show the relationship between variables.

The given graph is of a function f(x) which is shown on the y-axis. The horizontal line at y = 1 is also shown on the graph.

To find the input values that correspond with f(x) = 1, we need to look for the points where the function f(x) intersects with the horizontal line y = 1.

From the graph, we can see that there are two such points:

One point is where the function intersects the line at x = -7. At this point, f(x) = 1, since the function value is equal to the y-coordinate of the intersection point.

The other point is where the function intersects the line at x = 2. At this point, f(x) = 1 as well.

Therefore, the input values that correspond with f(x) = 1 are x = -7 and x = 2. So the answer is "x = -7 and x = 2".

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Answer: 2 inches in width

Step-by-step explanation:

4 - 6

divide both by 2

2 - 3

The width of a similar photo comes to be 2 inches.

Width of original photo = 4 inches

Height of the original photo = 6 inches

Height of the scaled photo = 3 inches

A scale factor is a number that multiplies (“scales”) a quantity.

Scale factor = height of scaled photo/ height of the original photo

Scale factor= 3/6 = 1/2

So, the width of the scaled photo = scale factor * width of the original photo

The width of the scaled photo = (1/2)*4

The width of the scaled photo =2 inches.

Therefore, the width of a similar photo comes to be 2 inches.

To get more about scaling visit:

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Answer:

3rd choice (1, -6)

Step-by-step explanation:

Answer:

2*2*2*3*3*5*7 is the answer

or B

Step-by-step explanation:

Answer:

answer 2

Step-by-step explanation:

Answer:

The directional bearing of the boat is N 30º E

Step-by-step explanation:

Let [tex]\vec v = (25, 25\sqrt{3})[/tex], where [tex]\vec v[/tex] is the vector velocity. Given that such vector is represented in rectangular, a positive value in the first component is the value of the vector in the east direction, whereas a positive value in the second component is in the north direction. The directional bearing of the boat ([tex]\theta[/tex]), measured in sexagesimal degrees, is determined by trigonometrical means:

[tex]\theta = \tan^{-1}\frac{v_{y}}{v_{x}}[/tex] (1)

If we know that [tex]v_{x} = 25[/tex] and [tex]v_{y} = 25\sqrt{3}[/tex], then the directional bearing of the boat is:

[tex]\theta = \tan^{-1} \sqrt{3}[/tex]

[tex]\theta = 60^{\circ}[/tex]

In consequence, we conclude that the direction bearing of the boat is 30 degrees to the East from the North (N 30º E).

Answer:

A) N 30 E

Step-by-step explanation:

Answer:

Step-by-step explanation:

f ( x ) = 17 ( 3 + x )

f ( -2 ) = 17 ( 3 + -2 )

f ( -2 ) = 51 + -34

f ( -2 ) = 17

= 17