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avanturin [10]
3 years ago
11

Help please me with this ....

Mathematics
1 answer:
Nonamiya [84]3 years ago
5 0
Ext. 13/44 hope it helpa
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Kalsom answers 25 questions in math tests. He scored 81% to 93%. Calculate all possible number of questions successfully answere
cricket20 [7]

Answer:

21 and 22

Step-by-step explanation:

Let's work backward from that 81%:  x/25 = 0.81 yields x = 20.25.  Nominally, 20.25 / 25 = 0.81, but x must be an integer.  Let's round 20.25 off to 20.

Thus, if Kalsom got 81%, it was a result of his having done 20 questions correctly.

81% corresponds to 20 questions correct;

82% to 20.5 questions correct, or, rounding up, to 21 questions correct;

83% to 20.75, or 21;

84% to 21 questions correct; this is the only result that makes sense (whole number of questions answered correctly)

85% to 21.25;

86% to 21.5;

87% to 21.75;

88% to 22 questions correct (this makes sense, unlike the last three)

89% to 22.25;

90% to 22.5;

91% to 22.75;

Assuming that the number of questions correct MUST be integer, then the possible number correct are 21 and 22, corresponding to 84% and 88% respectively.

4 0
3 years ago
Please help me with this equation, the values are in the file <br><br> x + B = Fx - Dx + H
Olin [163]

Answer:

x = -6

Step-by-step explanation:

B = 2

F = 6

D = 4

H = 8

x + B = Fx - Dx + H

x + 2 = 6x - 4x + 8

x + 2 = 2x + 8

-x = 6

x = -6

3 0
2 years ago
Read 2 more answers
Given angle A B C , in which Line AD bisects angle BAC. If m angle B=64 and m angle C =42, determine m angle BAD.
Andrew [12]
D=54 i might be wrong
3 0
3 years ago
The cost of tuition at a 2 year school is $11,000 per academic year. Ming is eligible for $9,500 in financial aid to cover tuiti
goldenfox [79]

Answer:

$125

Step-by-step explanation:

11,000 - 9,500 = 1,500

1,500 / 12 = 125 (we use 12 because 12 months = 1 year)

8 0
2 years ago
Read 2 more answers
Find the perimeter and area of the polygon with the given vertices C (4,0) D (4,7) E (8,7) F(8,0)
Dafna11 [192]
The perimeter would be 7+7+4+4 or 14+8 which equals 22 and the area would be 7x4 which is 28
3 0
2 years ago
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