2 years ago

HELP DUE SUPER SOON!!

Mathematics

1 answer:

kow [346]2 years ago

6 0

Answer:

2022 students

Step-by-step explanation:

Since 18 out of 270 students speak three or more languages, a prediction would be 30,330 x 18/270 = 2,022 students

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Someone please help with 4-6?

forsale [732]

4-6=-2 hope that helps!

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2 years ago

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Find the solution: -9(2x - 1) = 45<br> x = -4<br> x =23/-9<br> x = -2<br> x = 3

Aleks [24]

Answer:

x=-2

Step-by-step explanation:

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Is 2/3 a rational or irrational

anygoal [31]

Answer:

it is a rational number

Step-by-step explanation:

hope dis helps ;D

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20 POINTS HELPPPPP

kiruha [24]

For this case we have the following expression:

$\frac {216 ^ {n-2}} {(\frac {1} {36}) ^ {3n}} = 216$

We multiply both sides by: $(\frac {1} {36}) ^ {3n}$

$216 ^ {n-2} = 216 * (\frac {1} {36}) ^ {3n}$

We divide both sides by 216:

$\frac {216 ^ {n-2}} {216} = (\frac {1} {36}) ^ {3n}$

To divide powers of the same base, we place the same base and subtract the exponents:

$216 ^ {n-2-1} = (\frac {1} {36}) ^ {3n}\\216 ^ {n-3} = (\frac {1} {36}) ^ {3n}$

Rewriting:

$(6 ^ 3) ^ {n-3} = (\frac {1} {6 ^ 2}) ^ {3n}\\6 ^ {3n-9} = \frac {1} {6 ^ {6n}}\\6^{ 3n-9} * 6^{ 6n} = 1$

To multiply powers of the same base, we place the same base and add the exponents:

$6^{ 3n-9 + 6n} = 1\\6^{ 9n-9} = 1$

We know that any number raised to zero is 1, $a ^ 0 = 1.$

So, for equality to be true:

$9n-9 = 0\\9n = 9\\n = \frac {9} {9}\\n = 1$

Answer:

$n = 1$

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2 years ago

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Please help 20-23 it is 6th grade math and it is due October 16 please I really need help we are doing simplifying expressions a

mel-nik [20]

Hey I'm in 6th too, Simplify means to solve the prob

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3 years ago