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11Alexandr11 [23.1K]
3 years ago
10

Witch expression is the factorization of x2+10x+21

Mathematics
1 answer:
Alenkasestr [34]3 years ago
6 0

Answer:

x^2 +x(7+3) +21

x^2 +7x + 3x +21

x(x+7) +3(x+7)

(x+7) (x+3)

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Ed is doing a survey of popular colors for cars for a school report. He decides to take a sample by sitting near a busy intersec
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Number of white cars: n1=25
Number of blue cars: n2=17
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Number of silver cars: n4=21
Number of red cars: n5=9
Number of silver and red cars: n6=n4+n5=21+9→n6=30

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n=?

n=n3-n6=42-30→n=12

Answer: There are 12 white and blue cars more than silver and red cars.
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3 years ago
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3 years ago
What is the sum of the geometric series: <br>3<br>∑5(-2/3)^i<br>i=0
marta [7]
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A pair of pants with a marked price of $35.00 has a discount of 20%. How much is the discount?
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The discount is 20% off, right? What's 20% of 35? To do that, you need to do the problem 35*.20, because .20 is equivalent to 20%. Remember how it is 20% off? That means subtract here. When you do 35*.20, you'll get 7. Now, subtract 7 from 35. 35-7=28, and your answer is in money; $28.00. :)
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