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cabo531
16.02.2021 •
Mathematics
When a number is increased by 9.5%, the result is 58. What is the original number to the nearest tenth? (I've seen other questions like this, but the answer is wrong. It's not 50 or 52.49 or 52.5.)
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Ответ:
53
Step-by-step explanation:
58÷1.095= 53 is the answer
Ответ:
5.03196347032
Step-by-step explanation:
We do:
.095x+x=58
1.095x=58
x=52.96
52.96 is a approximation and when you do the math and see what 9.5 of 52.96 plus 52.96 is you get 57.9912 which is super close to 8 The exact answer is x = 5.03196347032
Ответ:
(x-2) ( x+2) ( 2x + 5)
Step-by-step explanation:
We will factor the given expression by grouping
The expression is 2x³ + 5x² - 8x - 20
= ( 2x³ + 5x² ) - ( 8x + 20 )
= x² (2x + 5) - 4(2x + 5) [ distributive property ]
= (a² -4) ( 2x + 5)
= (x-2) (x+2) (2x+5) [since a² - b² = ( a+b ) (a-b) ]
Then the factored form of the expression will be (x-2) ( x+2) ( 2x + 5)