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4 years ago

the two way frequency table below shows data on quidditch goals blocked when a goaltender was using a luck potion or a placebo

Mathematics

1 answer:

tankabanditka [31]4 years ago

8 0

Answer:

If you want to find the percentages, you must use the equation:

P = ((total tries in where the event is true)/total tries)*100%

(if you only want the decimal form, you can not multiply it by 100% and you will get a number between 0 and 1)

ok, for placebo we have 30 + 8 = 38 tries.

the frequency where the player block the goal is: p1 = (30/38)*100% = 78.9%

the frequency in where the player don't block the goal is:

p2 = (8/38)*100% = 21%

For the luck potion we have a total of:

23 + 5 = 28 tries.

The frequency where the player did block the goal is:

p1 = (23/28)*100% = 82.1%

then the frequency where the player did not block the goal is:

p2 = (5/23)*100% = 17.9%

So we can see that, in percentage, the luck potion is more efficient.

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2/3x - 1/9x + 5 = 20

BabaBlast [244]

Answer:I think the answer is x=27

Step-by-step explanation:

6 0

3 years ago

Are the ratios 25/45 and 15/27 proportional? Explain.

liberstina [14]

Write them out as a fraction then reduce them. If theyre the same then its proportional.

25/45 can be cancelled down to 5/9

15/27 can be cancelled down to 3/9

So no theyre not.

6 0

3 years ago

Am I correct? If not please explain why!

Kipish [7]

yes, you are correct. every input corresponds to only one output

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3 years ago

PLz answer before 11:59 pm

Tpy6a [65]

Answer:

SA = 2520 ft^2

Step-by-step explanation:

a = 21ft

b = 29ft

c = 20ft

h = 30ft

SA = 2 $A_{B}$ + (a+b+c)h

$A_{B}$ = s(s﹣a)(s﹣b)(s﹣c)

s = $\frac{a + b + c}{2}$

SA= ah + bh + ch + $\frac{1}{2}$ $\sqrt{-a^4 + 2(ab)^2 + 2(ac)^2 - b^4 + 2(bc)^2 - c4}$

SA= (21 * 30) + (29 * 30) + (20 * 30) +

$\frac{1}{2}$ $\sqrt{-(21)^4 + 2(21 * 29)^2 + 2(21 * 20)^2 - (29)^4 + 2(29 * 20)^2 - (20)^4}$

SA = 2520 ft^2

6 0

3 years ago

Please help me with math, it’s easy!! explanation needed!

Olenka [21]

Answer:

Step-by-step explanation:

This equation is in "vertex form," meaning that you can identify the vertex and other features of the graph from the equation.

y = a(x -h)² +k . . . . . the vertex is (h, k); the vertical scale factor is "a"

Comparing to your equation, you see ...

a = -1/2, h = 3, k = -1

The vertex is (h, k) = (3, -1). The vertical scale factor is negative.

This tells you the graph opens downward (the scale factor is negative), and the vertex (maximum point) is below the x-axis. (It has a negative y-coordinate.)

Because it start below the x-axis and goes down from there, the graph does not intersect the x-axis. There are zero (0) x-intercepts.

3 0

3 years ago