The exchange rate between non-fixed currencies continually fluctuates. The chart below shows the exchange rate of the US dollar to the Japanese yen over the course of six days.

Day
$:¥
Monday
1:88.6122
Tuesday
1:90.8305
Wednesday
1:87.5507
Thursday
1:91.2323
Friday
1:92.7120
Saturday
1:89.4477

Mary has $311.75 to convert into yen. The currency exchange she is using charges a surcharge of 6% when converting currency. About how many more yen will Mary receive if she makes her trade on the day with the most favorable exchange rate than if she makes her trade on the day with the least favorable exchange rate?
a.
¥1,125
b.
¥1,513
c.
¥1,609
d.
¥1,706

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Ответ:

jamaiciaw6

20.04.2023

Mathematics

$\frac{5(2k - 3)-3(k + 4)}{3k+2}$

Substitute -2 for k into the expression.

$\frac{5[2(-2) - 3]-3[(-2) + 4]}{3(-2)+2}$

Solve inside the parentheses first.Multiply 2 * (-2) in the first parentheses, and add (-2) + 4 in the second parentheses. Multiply 3 * (-2) on the bottom.

$\frac{5(-4 - 3) - 3(2)}{-6+2}$

Solve inside the first parentheses.Add -6 + 2.

$\frac{5(-7) - 3(2)}{-4}$

Multiply 5 * (-7) and 3 * (2).

$\frac{(-35) - (6)}{-4}$

Subtract -35 and 6.

$\frac{(-41)}{-4}$

-41/-4 is the same as 41/4, and 41/4 cannot be simplified further, so:Your answer is 41/4.

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