Sanchezj104
28.11.2020 •
Mathematics
If line lis parallel to line m, find the value of x and y. (please help taking a test)
(7x + 12)
(12x - 28)
(9y - 77)"
O x = 10.3 and y = 17.9
O x = 8 and y = 21
O x = 7 and y = 12
x = 12 and y = 7
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Ответ:
x=8 and y=21
Step-by-step explanation:
12x-28=7x+12 (the 2 angles are equivalent)
12x-7x=12+28
5x=40
x=8
9y-77 + 12x-28 =180 (the sum of those 2 angles is a flat angle (180°))
9y-77+12*8-28=180
9y=180+28+77-96
9y=189
y=21
Ответ:
$96.15
$100
Step-by-step explanation:
If the store puts 30% on the wholesale price, it means that everything is 30% more than its wholesale cost. If the bike is $125 we can calcualte the wholesale price by subtracting 30%. Let x be the wholesale price. We can write an expression relating the price after 30% on the wholesale price:
Solve for x:
The whole sale price was $96.15
If the bike was discounted by 20%: