2 years ago

This is probably pretty easy, I could solve all the other ones but I got stuck on this one.

Mathematics

1 answer:

anyanavicka [17]2 years ago

8 0

Answer:

Step-by-step explanation:

Let x be the score on the next test

We are averaging 6 tests and want an average of 75

( 82+91+38+78+83+x) /6 = 75

Multiply each side by 6

( 82+91+38+78+83+x) = 75*6

( 82+91+38+78+83+x) =450

Combine like terms

x+372 = 450

Subtract 372 from each side

x+372-372 = 450-372

x =78

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polet [3.4K]

y+z=10

x+z=8

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(y+z)-(x+z)=10-8

y-x=2

y+x=12

solve simultaneously

x=5, y=7

then substitute to get z=3

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3 years ago

Can some one help me with number 1.

sammy [17]

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3 years ago

An arc on a circle measures 85°. The measure of the central angle, in radians, is within which range? 0 to StartFraction pi Over

barxatty [35]

Answer:

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Step-by-step explanation:

we know that

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Remember that

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the range in radians is $(0,\frac{\pi}{2})$

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3 years ago

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hram777 [196]

Answer:

A function can be reflected about an axis by multiplying by negative one. To reflect about the y-axis, multiply every x by -1 to get -x. To reflect about the x-axis, multiply f(x) by -1 to get -f(x).

Step-by-step explanation:

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3 years ago

Elton is a candle maker. Each 15 cm long candle he makes burns evenly for 6 hours if Elton makes a 45 cm long candle, how long w

tatuchka [14]

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