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VARVARA [1.3K]
2 years ago
12

Which expression is equivalent to 20 + 8y − 9y − 21

Mathematics
1 answer:
Sindrei [870]2 years ago
4 0

Answer:

-y-1

Step-by-step explanation:

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Mae Ling earns a weekly salary of $325 plus a 7% commission on sales at a gift shop. How much would she make in a work week if s
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Answer:

$661

Step-by-step explanation:

Find how much she made from commission by finding 7% of 4,800

Multiply 4800 by 0.07

4800(0.07)

= 336

Then, add this to her weekly salary:

325 + 336

= 661

So, she would have made $661 that week

3 0
3 years ago
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Fractions equivelant to 1/4, 1/2, 3/4
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Just divide by 2 2/8 2/4 6/8

5 0
4 years ago
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3 2/3 as a decimal <br><br> Please help need to now
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2/3= 0.6

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Hope this Helps!!

5 0
4 years ago
Read 2 more answers
Which of the following is not an identity?
Shkiper50 [21]
A ) cos² x · 1 / sin x - 1 / sin x = - sin x
cos² x - 1 / sin x = - sin x 
- sin² x / sin x = - sin x
- sin x = - sin x     ( correct )
B ) sin x ( cos x / sin x + sin x / cos x ) = 1 / cos x
sin x · ( cos² x + sin²x ) / sin x cos x = 1 / cos x
sin x · 1 / sin x cos x = 1 / cos x
1 / cos x = 1 / cos x  ( correct )
C ) cos² x - sin² x = 1 - 2 sin² x
1 - sin² x - sin² x = 1 - 2 sin² x
1 - 2 sin² x = 1 - 2 sin² x   ( correct )
D ) 1/sin²x + 1/ cos²x = 1
cos²x + sin² x / sin² x cos² x = 1
1 / cos² x sin² x = 1
cos²x sin² x ≠ 1
Answer: D ) is not an identity. 
8 0
3 years ago
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