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Suppose your grades on four science exams are 99, 86, 76, and 95. What grade do you need on your next exam to have a 91 average on the five exams?


A.
89.4


B.
93


C.
90


D.
99

Respuesta :

calculista

Answer:

Option D. [tex]99[/tex]

Step-by-step explanation:

Let

x------> the grade in the fifth exam

we know that

[tex]91=(99+86+76+95+x)/5[/tex]

solve for x

[tex]91*5=(356+x)[/tex]

[tex]455=(356+x)[/tex]

[tex]x=455-356=99[/tex]

Answer:Correct is 99

Step-by-step explanation:

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