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Anna11 [10]
3 years ago
7

Functions need help fast

Mathematics
1 answer:
galina1969 [7]3 years ago
4 0

Konichiwa~! My name is Zalgo and I am here to help you out on this beautiful day. The answer is -7x-1. When you input it into the equation, you should get f (-7x-1) = -8.

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a dvd costs twice as much as a music cd. Jack buys 2 dvds and 2 cds and spends $45. Determine how much one cd costs. in dollars
VMariaS [17]
dvd=d \\ cd=c \\  \\  \left \{ {{d=2c} \atop {2d+2c=45}} \right.  \\  \\ 2(2c)+2c=45 \\ 4c+2c=45 \\ 6c=45 \\ c=7.5 \\  \\ d=2(7.5) \\ d=15

One CD costs $7.50.
One DVD costs $15.00.
3 0
4 years ago
Read 2 more answers
What are the factors of 21?
Genrish500 [490]
The factors 1 ,3 ,7 ,21
3 0
3 years ago
Explain how you know that the sum of 12.6,3.1,and 5.4 is greater than 20.
Galina-37 [17]
You have to only add the values
   12.6
     3.1
 +  5.4
=  21.1

so  21.1 > 20
8 0
3 years ago
I need help<br>22 - 3b = 7
skelet666 [1.2K]
I hope this helps you




22-7=3b



15=3b


b=5
6 0
4 years ago
HELP WILL MARK BRAINLIEST
ryzh [129]

Answer:

1 1/21

Step-by-step explanation:

let's make the first fraction (2 4/9)combined with the number, times 2*9=18 add that to 4= 22/9 now times across 22*3=66 and 9*7=63 we will get 66/63 simplify 1 3/63>1 1/21

7 0
3 years ago
Read 2 more answers
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