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lara [203]
4 years ago
12

Martin's average score after 4 tests is 89. What score on the 5th test would bring Martin's average up to exactly 90?

Mathematics
2 answers:
krok68 [10]4 years ago
6 0

Answer:

104

Step-by-step explanation:

89x4=356 90x5=450

450=356=104

never [62]4 years ago
6 0

Answer:

94

Step-by-step explanation:

((89x4)+94) divided by 5 = 90

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Anwser: 18=9 groups  and 20= 10 groups

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Arlecino [84]

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3 years ago
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kobusy [5.1K]
Multiply the 5 over the answer is b
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3 years ago
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Please help and explain! *Serious answers only* 30 points :)
topjm [15]
Ok so it's a proportion so this fraction is to this fraction. the smaller rectangle has sides 4 and 12. the larger one has 8 and x. so u set it up 4/12=8/x. the 4 and 8 r both the short sides so u want those on top and 12 and x r long sides so those on bottom. since that is not an answer option u can set it up as 8/4=x/12 because u still keep the variables of the same rectangle from being multipled with each other. so answer #2 is correct
4 0
3 years ago
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Graph ​ y−5=−2/3(x+9)​.<br> plot two different points. please show work i am very lost. thank you
Sidana [21]
Y -:5 = 2/3x + 6 because 6 is 2/3 of 9
add 5 to both sides
y - 5 +:5 = 2/3x + 6 + 5
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the y intersept is 11 or (0 , 11) when x is 0
when x is 3
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so a 2nd point could be (3 , 13)
4 0
3 years ago
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