vanessasmith47
27.07.2019 •
Mathematics
*the sum of two numbers is 2,490. find the numbers if 8.5% of the first is equal to 6.5% of the second.
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Ответ:
0.085x=0.065y
multiply the first equation with 0.085: 0.085x+0.085y=211.65
repleace 0.085x with 0.065y (because 0.085x=0.065y): 0.065y+0.085y=211.65
0.15y=211.65
y=1411
x=2490-1411=1079
so the first number is 1079, the second number is 1411
Ответ:
D. c/7
Step-by-step explanation:
An algebraic expression refers to the equation. In the question, it says to divide a number (c) by seven, giving you c/7