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0gNanaa
17.10.2020 •
Mathematics
in a class test containing 10 questions 5 marks are awarded for every correct answers and -2 for every incorrect answer and 0 for questions not attempted Reshma gets 5 correct answers and 5 incorrect answers, what is her score?
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Ответ:
15
Step-by-step explanation:
marks for correct answers = 5×5= 25
marks lost for incorrect answers = 5 ×2= 10 or -10 gained
so total marks = 25 +(-10) = 15
Ответ:
b = 3/8a
Step-by-step explanation:
The following table shows a proportional relationship between A and B.
a b
8 3
24 9
40 15
1/4
Let's find the constant of proportionality.
In the proportional relationship between aaa and bbb, one constant of proportionality is the number we multiply by aaa to get bbb.
a\, \times\, ?=ba×?=b
2/4
a b
8 3 8 × 3/8=3
24 9 24×3/8=9
40 15 40×3/8=15
The constant of proportionality is 3/8. This means we can multiply 3/8 by a to get b.
Now, let's represent that as an equation.
b= constant of proportionality × a
b = 3/8a
One correct equation is b=3/8a
hi. So I did copy this answer from Khan Academy, but I thought it would help you guys so I put it on here. -Alicia Dugaw