Work out 3/4 - 1/6
Give the answer in the simplest form

Answers

Answer 1

Answer: $(3)/(4)-(1)/(6)=(3 * 3)/(4 * 3)-(1 * 2)/(6 * 2)=(9)/(12)-(2)/(12)=(9-2)/(12)=(7)/(12)$

Answer 2

Answer: $(3)/(4)- (1)/(6) = (3\cdot3)/(4\cdot3) - (1\cdot2)/(6\cdot2) = (9-2)/(12) [tex]= \boxed {(7)/(12) }$

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20 is what percent of 52?

Answers

20 is 38.46% of 52. Hope i helped

If 52 ------> =100% (=1)
Then 20----> x
(Rule of 3)
X=20/52 =38.46%

Cos2a=1-2sin^2a for all values of a.

Answers

$cos2a= cos^(2) a- sin^(2) a \n but \ cos^(2) a + sin^(2) a=1 \n i.e. \ cos^(2) a=1- sin^(2) a$
Therefore,
$cos2a=1- sin^(2) a- sin^(2) a \n =1-2 sin^(2) a$

true (just did this on apex)

Find the value of x that makes the equation true.9x = –54

A.6

B.–9

C.–6

D.–54

Answers

To find the answer you divide both sides by 9. Which then gives you x=-6 as your answer.
C. -6

What is -7nx+2nx+2n+7x equal to

Answers

-7nx + 2nx + 2n + 7x ...combine like terms
-5nx + 2n + 7x

5nx+2n+7x which is combined like terms all you do is cut the problem down.

If 1/4 inch represents 50 miles, how many inches are needed to represent 225 miles?

Answers

0.25 inch ---> 50 miles
?? inches ---> 225 miles
so the answer is (225*0.25)/50 = 1.125 inches

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