What is 5/18 + (-1/6)A.4/9

B.1/9

C.1/3

D.2/3

help please!

Answers

Answer 1

Answer: It's B.1/9
Hope this helps.:)

Answer 2

Answer: 5/18+(-1/6)=1/9 Hope it helps!

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There are 20 million bacteria per square centimeter of coral in a coral reef. The coral reef covers 13000 km^2. How many bacteria are there in the coral reef?

Answers

Answer:

2.6 * $10^(21)$ bacteria

Step-by-step explanation:

We know that there are 20 million bacteria in 1 $cm^2$ of coral reef. Let's write the number of bacteria in scientific notation with powers of 10:

$20,000,000= 2*10^7$

Now let's write 1 $cm^2$ in square meters, knowing that one cm equal 0.01 meter ( $10^(-2)$ meters:

$1 \, cm^2 = 1* (10^(-2)\,m)^2= 10^(-4)\, m^2$

So now we can find how many bacteria there is in one $m^2$ of coral reef:

Number of bacteria in $1\,m^2 = 2 * 10^7* 10^4 = 2 * 10^(11)$ bacteria

we can now express 13000 $km^2$ in $m^2$ knowing that 1 km = 1000 m = $10^3$ m:

$13000\,km^2= 1.3 * 10^4 \,km^2=1.3 * 10^4*(10^3m)^2= 1.3*10^4*10^6\'m^2=$

Since we know the number of bacteria per every $m^2$ of coral reef, the number of bacteria in $1.3*10^(10)\,m^2$ of coral reef will be the product of these two numbers:

Total number of bacteria: $2*10^(11) * 1.3*10^(10)=2.6* 10^(21)$

What is the measure of angle x?

Answers

Answer:

100 degrees

Step-by-step explanation:

because if it was in the middle i would of been 90 degrees.

the answer is 130

explanation : 50 + X = 180

If a rectangle shows has how many equal parts are there

Answers

well... umm there's two the sides and the top and bottom

there are 2 equal parts from top to bottom and 2 equal parts from side to side so 2 equal each parts.

Three vertices of a rectangle have coordinates (–3, 1), (7,1), and (7, –4). What are the coordinates of the fourth vertex of the rectangle?

A.
(–3, –4)

B.
(–3, –1)

C.
(7, –3)

D.
(7, 4)

Answers

The answer is A because a rectangle has sides that go straight down basically -3 there has to be two -3 for x coordinate and two 7 for y coordinate and the missing coordinate also has to line up with the coordinate right next to it so it must have -4 as it's coordinate so basically the coordinate vertically across from it has the same x coordinate and the coordinate horizontal from it has the same y coordinate. So it's (-3,-4)

Explain why 2.15 and-2.15 opposite

Answers

The two numbers 2.15 and -2.15 are opposite numbers

What do you mean by opposite of the numbers?

The opposite of the numbers can be obtained changing the positive numbers to negative equivalent of the number
The positive numbers are greater than 0 and lies on the right side of the number line
The negative numbers are less than 0 and lies on the left side of the number line

Given data ,

On a number line, 2.15 and -2.15 are the same distance away from 0. Therefore, they are opposites.

If you were to add 2.15 and -2.15 you'd get 0.

To learn more about opposite of the numbers click :

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Because on the number line the are an equal distance away from zero. One is just to the left, the other to the right.

Stella graphs the equation y=1/3x – 2. Select all statements about Stella's graph that are true.

A.The graph is a straight line.

B.The line passes through the origin.

C.The line passes through the point (0, –2)(0, –2) .

D.The slope of the line is 3.

E.The y-intercept of the line is 2.

Answers

The correct statements regarding the line y = (1/3)x - 2,

A. The graph is a straight line.

C. The line passes through the point (0, - 2) .

What are lines and their slopes?

We know lines have various types of equations, the general type is

Ax + By + c = 0, and the equation of a line in slope-intercept form is

y = mx + b.

Where slope = m and b = y-intercept.

the slope is the rate of change of the y-axis with respect to the x-axis and the y-intercept is the (0,b) where the line intersects the y-axis at x = 0.

Given, An equation of a line y = (1/3)x - 2.

The correct statements are,

The graph is a straight line.

The line does not pass through the origin at, when x = 0, y = - 2.

Now, for x = 0, y = - 2 so, The line passes through the point (0, - 2).

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The answer should be The graph is a straight line. and The line passes through the point (0, –2)(0, –2) .
Hope I helped.

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