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3 years ago

Can someone please help me with these questions!! Thanks,

Mathematics

1 answer:

fiasKO [112]3 years ago

8 0

6a. 1 - 2sin(x)² - 2cos(x)² = 1 - 2(sin(x)² +cos(x)²) = 1 - 2·1 = -1

6c. tan(x) + sin(x)/cos(x) = tan(x) + tan(x) = 2tan(x)

6e. 3sin(x) + tan(x)cos(x) = 3sin(x) + (sin(x)/cos(x))cos(x) = 3sin(x) +sin(x) = 4sin(x)

6g. 1 - cos(x)²tan(x)² = 1 - cos(x)²·(sin(x)²)/cos(x)²) = 1 -sin(x)² = cos(x)²

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2 years ago

Write systems of equations from context Lincoln is preparing many gifts for a family holiday party each gift must either be wrap

Angelina_Jolie [31]

Answer:

w + b = 13
6.5w + 2b = 57.5

Step-by-step explanation:

Let w represent the number of gifts wrapped. Let b represent the number of bags prepared.

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6.5w +2b = 57.5 . . . . total time spent preparing gifts

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3 years ago

PLZ HELP ME PLZ I don't understand this

FinnZ [79.3K]

Answer:

Step-by-step explanation:

For this equation we have to plug in, so z= 6 and w=7. the question is 8z+7w

so plug in 6 for z and 7 for w. 8(6)+7(7) so 8*6 is 48 and 7*7= 49. 48+49= 97

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5 0

3 years ago

. If mZJ= (7x + 13)", mZK = (83 - 2x), and

OLga [1]

Answer:

m∠J = 76°
m∠K = 65°

Step-by-step explanation:

The sum of angle measures is ...

(7x +13)° +(83 -2x)° = 141°

5x +96 = 141 . . . . . collect terms, divide by °

5x = 45 . . . . . . . . . subtract 96

x = 9 . . . . . . . . . . . divide by 5

7x +13 = 7·9 +13 = 76 . . . . . find m∠J

m∠J = 76°

m∠K = 141° -76°

m∠K = 65°

8 0

3 years ago