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musickatia [10]
3 years ago
12

What’s the answer to number 13 14 and 15

Mathematics
1 answer:
UNO [17]3 years ago
6 0

Answer:

14. It is biased, because the store manager sends the survey to a customer who registered. I will send the survey to a customer who is not registered and who is new to the store.

15. This is unbiased, because they chose the students randomly.

Step-by-step explanation:

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Find the volume of given prism round to the nearest tenth necessary.
atroni [7]
First, find the area of the base (the triangle) and then multiply it by the height

to find the area of the triangle you need to know the height. cut the triangle in half and you get a right triangle, from there you can use the Pythagorean theorem. remember since you cut the triangle in half you have to divide one of the sides by 2

a^2 + b^2 = c^2              (plug in known information)
a^2 + (7.5)^2 = (15)^2      (solve, first solve the exponents)
a^2 + 56.25 = 225         (subtract 56.25 on both sides)
a^2 = 168.75                    (solve for a, put 168.75 under the square root)

then once you find the area multiply by the known height



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3 years ago
Need Help balancing the 3 questions on top
Scrat [10]

Answer:

4Na + 1O2 > 2Na2O

SF6 > 1S + 3F2

2FE2O3 > 4FE + 3O2

Step-by-step explanation:

1. Identify the Products and Reactants(always do O2 last)

2. determine how many atoms of each element are present on each side of the equation

3. Add Coefficients and never change the subscripts. If there's a coefficient in front of any compound, it is distributed to both elements.

4. find the total number of atoms on both sides of the equation and make sure they equal with each other

7 0
4 years ago
THIS IS URGENT!!! I NEED THE ANSWER ASAP!!! I'LL GIVE AWAY 20 POINTS!!!
Verizon [17]
The answer to that question should be 75 because S represents the additional cups of sugar Nate buys and since he bought 30 additional cups that means S equals 30
6 0
3 years ago
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Find all solutions to the equation. -\dfrac{2}{x(x+2)}=\dfrac{x+3}{x+2}− x(x+2) 2 ​ = x+2 x+3 ​ minus, start fraction, 2, divide
Gnoma [55]

Answer:

x=-1

Step-by-step explanation:

We have been given an equation \frac{-2}{x(x+2)}=\frac{x+3}{x+2}. We are asked to find the solutions of our given equation.

First of all, we will cross multiply our given equation as:

-2(x+2)=x(x+2)(x+3)

Subtract x(x+2)(x+3) from both sides:

-2(x+2)-x(x+2)(x+3)=x(x+2)(x+3)-x(x+2)(x+3)

-2(x+2)-x(x+2)(x+3)=0

Now we will factor out (x+2).

(x+2)(-2-x(x+3))=0

(x+2)(-2-x^2-3x)=0

(x+2)(-(x^2+3x+2))=0

Now we will factor by splitting the middle term.

-(x+2)(x^2+2x+x+2)=0

-(x+2)(x+2)(x+1)=0

-(x+2)^2(x+1)=0

Now we will use zero product property and solve for x as:

-(x+2)^2=0,(x+1)=0

(x+2)=0,(x+1)=0

x=-2,x=-1

Now, we will check for extraneous solutions.

We can see that x=-2 will make both denominators zero because our function is not defined at  x=-2.

Therefore, the solution for our given equation is x=-1.

7 0
4 years ago
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kotykmax [81]
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4 years ago
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