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garri49 [273]
3 years ago
7

Thirty percent of a radioactive substance decays in four years.

Mathematics
1 answer:
wel3 years ago
8 0

Answer:

The substance decays by 7.5% every year

Step-by-step explanation:

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-2(x+6)+3= -11x+4(x+4)
Katarina [22]
Distribute 
-2(x+6)+3
-2x-12+3
-2x-12+3=-11x+4(x+4)
Distribute 
4(x+4)
4x+16
-2x-12+3=-11x+4x+16
Combine Numbers && Variables 
-2x-9=-7x+16
Add The 7 Over To The -2x 
5x-9=16
Add 9 Over To 16 
5x=25
x=5 
So 5 Is Your Answer

~Hope This Helps :)
Need More Help With Question Just Inbox Me 
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3 0
3 years ago
Write a linear equation in standard form given the line passes through (-4,-3) and (6,-2).
garik1379 [7]
(-2+3)/(6+4)= 1/10

y+3=1/10(x + 4)

y + 3 = (1/10)x + 4/10

y + 30/10 = ( 1/10)x + 4/10

y = (1/10)x + 4/10 - 30/10

y = (1/10)x - 26/10

y = (1/10)x - 13/5

10(y = (1/10)x - 13/5)

10y = x - 26

-x + 10y = -26

7 0
3 years ago
Please help me solve this problem
SSSSS [86.1K]
The answers or your problem is x=6
6 0
3 years ago
Read 2 more answers
Charlie reads quickly, he reads 1 3/7 pages every 2/3 minutes. how many pages does he reqd per minute.
elena-s [515]
1page and 3/7 of a page means 10/7pages.
2/3 minutes equals 40 seconds.
1 minute = 60 seconds
divide 10/7 by 40 then multiply the answer by 60 you get the number of pages Charlie can read per minutes.
(10/7 ÷ 40)*60=15/7=2 pages and 1/7 of the page.
Answer: 2 1/7
7 0
3 years ago
Read 2 more answers
A store is having a clearance special and every item is 20% off what is the sale price of a 230 suit
poizon [28]

Answer:

184

Step-by-step explanation:

80% of 230

0.8x230

8×23

=184

8 0
2 years ago
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