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Rashid [163]
3 years ago
11

A group of forty-eight eight grade students was surveyed to find out much time they spent studying for their final exam and thei

r final grade. The table below summarizes the responses.
-------------------------------------------------------------------------------------------------------------
Exam grade of 80% Exam grade less than
or higher 80%
---------------------------------------------------------------------------------------------------------------
Studied 4 or 18 6
more hours
--------------------------------------------------------------------------------------------------------------
Studied less
than 4 hours 10 14
-----------------------------------------------------------------------------------------------------------------
What percent of students who took the exam scored an 80 or above on the exam?
Mathematics
1 answer:
cluponka [151]3 years ago
7 0

Answer:

58.33333%

Step-by-step explanation:

                                 Exam ≥ 80%          Exam < 80%

Studied 4+ hours         18                                6

Studied < 4 hours         10                               14

The number of students who took the exam is 18+10+6+14 =48

The number of students who got an 80 or above is 18+10 = 28

The percent with 80 or above is  80 or above over total

28/48

.5833333

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Add three on both sides to get rid of it
9+3 and -3 + 3 the three is negative because you drop the minus sign down
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3 years ago
Given f(x)=3x-1 find f(-1)
vaieri [72.5K]

Answer:

<h2>f( - 1) = - 4</h2>

Step-by-step explanation:

f(x) = 3x - 1

To find f(-1) substitute the value of x that's

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Hope this helps you

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