Will give brainliest
grades in a college english class are weighted: tests 60%, book review 20%, project 20%. find the final grade of a student with averages of: tests 86, project 76, reviews 77.

57.9
91.7
65.5
82.2

82.2 (the last option)

Step-by-step explanation:

Weighted Sum

When we get a sequence of values a,b,c... and we want to know the sum of all but with different percent weights pa,pb,pc... where pa+pb+pc...=100%, we compute the weighted sum as

S=a.pa+b.pb+c.pc...

The student got this final grades: tests 86, project 76, reviews 77 and their relative weights are tests 60% (0.6), book review 20% (0.2), project 20% (0.2)

The final grade is

s=86(0.6)+76(0.2)+77(0.2)

S=82.2

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.