3 years ago

Help PLEASE. I got number 3 but I can't figure out number 4.

Mathematics

1 answer:

Sergeeva-Olga [200]3 years ago

6 0

Answer:

Verify the identity using trig rules.

tan ( x − π /2 ) = − cot ( x ) is an identity

Step-by-step explanation:

i think this is it, hope it helps

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Dmitry [639]

Step-by-step explanation:

(20). FH= 22-15 = 7

(21). FH = 42 - 22 = 20

(22). FH = 53 - 40 = 13

8 0

2 years ago

Can any one please help me in this the teacher did not explain this it have to be in the lowest term also no decimal answer than

Zinaida [17]

Answer:

Step-by-step explanation:

$A . -5+3x =-41\\3x=-41+5\\3x = -36\\\frac{3x}{3} =\frac{-36}{3} \\x = -12\\\\\\\\\\B. 7x-4=-2x+11\\Collect-like-terms\\7x+2x=11+4\\9x=15\\\frac{9x}{9} =\frac{15}{9} \\\\x = \frac{5}{3} \\\\C. \frac{-4x}{5} =8\\Cross-multiply\\-4x=40\\\frac{-4x}{4} =\frac{40}{-4} \\x = -10\\\\D. \frac{x}{3} -\frac{1}{2} =\frac{1}{4} \\\frac{x}{3} =1/4+1/2\\\frac{x}{3} = \frac{3}{4} \\Cross-multiply\\4x =9\\4x/4 =9/4\\x = 9/4\\$