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shamayajohnsonsh5
23.02.2021 •
Mathematics
Proportional Relationships & Percentages:Question 1
Latonya bought hotdogs for $1.29 each to sell in the
concession stand. She sold them for $3.00 each. What is
the approximate percent increase in price?
Solved
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Ответ:
57%
Step-by-step explanation:
Given data
Cost price = $1.29
selling price= $3
Change= 3-1.29
Change= $1.71
Hence the % increase
= 1.71/3*100
= 0.57*100
= 57%
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)