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maria [59]
3 years ago
14

I need help with this percent problem ASAP

Mathematics
1 answer:
MrRissso [65]3 years ago
6 0
He gave 75 CDs away and that was 6% of his collection.
⇒ 6% = 75

Find 1 %:
6% = 75
1% = 75 ÷ 6 = 12.5

Find 100% (100% being his full collection):
1% = 12.5
100% = 12.5 x 100 = 1250

Answer: He had 1250 CDs before he gave some away.

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If the angles are represented in degrees, find both angles: sin(x+7)=cos(4x+8)
garri49 [273]

Answer:

m\angle 1 = 22\degree

m\angle 2 = 68\degree

Step-by-step explanation:

\sin(x + 7) =  \cos(4x + 8) \\  \sin(x + 7) =  \sin \{90  - (4x + 8) \} \\  \{ \because \cos \theta =  \sin(90 \degree -  \theta)  \}\\  \therefore \: (x + 7) = 90 - (4x + 8) \\ x + 7 + 4x + 8 = 90 \\ 5x = 90 - 15 \\ 5x = 75 \\ x =  \frac{75}{5}  \\ x = 15

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(4x + 8)° = (4*15 + 8)° = (60 + 8)° = 68°

m\angle 1 = 22\degree

m\angle 2 = 68\degree

7 0
3 years ago
Find the length of each model. Then find the scale factor. (Pictures attached #3/#4)
max2010maxim [7]

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Unrelated to the question, that house around number 3 gives me nostalgia of elementary school :)

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