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Vesna [10]
3 years ago
12

I need help on 11-13 please i need this done asap! Can someone help me out

Mathematics
2 answers:
marin [14]3 years ago
7 0
Learn this the sum of angles in a polygon is (n-2)* 180. n is the number of sides or angles in the polygon.
Alex777 [14]3 years ago
4 0
13 is 141. A octagon has 1080 degrees and if you add all the angles up you get 939 and 1080-930=141
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Tony's class needs more than $500 for the school dance.
Liula [17]

Answer:

No, Tony is not correct. Solving the inequality tells us that x is greater than or equal to 37.5 . Since the class must wash a whole number of cars, they need to wash at least 38 cars.

Step-by-step explanation:

This is the sample response

(I just took the assignment lol)

7 0
3 years ago
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Find an explicit rule for the nth term of the sequence.
Pavel [41]
Hello ;
<span>an = 1 • 3n - 1</span>
5 0
3 years ago
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What is the square root of 90 exactly?!?!
Dmitriy789 [7]
The awnser is 9.48683298051, hope I helped!
6 0
3 years ago
Please help I don’t understand number 16
Allisa [31]

Let's go step by step:

a) You are given four couples of x and y values which model the relationship between the number of drinks and their cost. So, the couple (x,y)=(0,0) means that if you buy zero drinks, you spend no money. That makes sense. The next information we have is (x,y) = (2,3), which means that two drinks cost 3 dollars, and so on.

So, you simply need to draw on the grid the four points

(0,0),\ (2,3),\ (4,6),\ (6,9)

b) The domain is the set of inputs. Since we only know the value of the function on four different points (we know the price for 0,2,4 and 6 drinks), the domain is discrete. In fact, a continuous domain must contain an interval (for example, [1,2] is a continuous domain), whereas if you pick a certain number of points (like in this case: we picked 0,2,4 and 6), the domain is discrete.

c) Once the points are drawn on the grid, you can see that they all lie on the same line. To find that line, we will only need two of those points (once two points are fixed, there is only one line passing through them). In general, the equation of the line passing through P = (P_x,P_y) and Q = (Q_x,Q_y) is

\cfrac{x-P_x}{Q_x-P_x} = \cfrac{y-P_y}{Q_y-P_y}

Let's choose, for example, the first two points. The equation is

\cfrac{x-0}{2-0} = \cfrac{y-0}{3-0} \iff \cfrac{x}{2} = \cfrac{y}{3} \iff y=\cfrac{3}{2}x

d) Now that we know the equation of the line, we can compute the cost of any number of drinks: the equation of the line is a function that associates a cost, y, with every possible number of drinks, x.

Of course, some associations will be odd - we can compute the cost of \sqrt{2} drink, but what would it mean?

Anyway, the question about the cost of two drinks seems more than reasonable, so let's see which y value is associate with the particular x value of 2:

y = \cfrac{3}{2} x \implies y = \cfrac{3}{2}\cdot 2 = 3

So, two drinks cost 3 dollars.

3 0
3 years ago
If the area is 27 meters &amp; 6 meters is the height what is the length ?
bezimeni [28]
Area= legnth times width
or sometimes
area=legnth times height
area=measure1 times measure 2 on a flat plane
dependson the names

area=27
height=6
area=legnth times height
subsitute
27=legnth times 6
divide both sides by 6
27/6= legnth
simplified to 4 and 3/4
legnth=4 and 3/4 meter
subsitute
8 0
3 years ago
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