3 years ago

I have a bad memory,i learned this but I forgot it (I swear I'm not lying)

Mathematics

1 answer:

mihalych1998 [28]3 years ago

3 0

Answer:

Step-by-step explanation:

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The mean weight 20 students in a room is 65 kg one student one student who weight is 88kg went into the room what is the new mea

umka2103 [35]

The new mean is 66.09

<u>Explanation:</u>

Mean weight of 20 students = 65kg

One student with 88kg entered the room.

New mean = ?

$\frac{x_1+x_2+....+x_2_0}{20} = 65$

$\frac{x_1+x_2+....+x_2_0 + 88}{21} = ?$

The above equation can further be written as:

$x_1 + x_2 +....+x_2_0 = 65 X 20\\\\x_1 + x_2 +....+x_2_0 = 1300$

New mean = $\frac{1300 + 88}{21}$

= 66.09

Therefore, the new mean is 66.09

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3 years ago

Create at least three equations where the quadratic has a vertex of (-3,-4). Explain how you would do that, please.

Helen [10]

$vertex = \binom{ - \frac{b}{2a} }{ \frac{4ac - {b}^{2} }{4a} }$

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3 years ago

If angles P and Q are supplementary angles, which of the following must always be true?

user100 [1]

Answer:

180

Step-by-step explanation:

for two angles to be supplementary, their sum must be equal to 180°

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A jet ski rental charges A flat rate of $75 ,plus an additional $60 per hour you want to spend less than $200. for how many hour

cluponka [151]

The equation to solve would be setting

60×- the m plus 75,the b set to 200 the maximum that's wanted to be used. the equation will look like this

200=60x+75

-75. -75

125=60x
125/60 60x/60

2.08=x

and since you cant round the time the answer will be left at 2

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How much would $100 invested at 8% interest compounded continuously be worth after 15 years? Round your answer to the nearest ce

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$100\%+8\%=108\%=1.08\\\\\$100\cdot1.08^{15}\approx\$317.22\leftarrow answer$

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3 years ago

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