Aika spent a total of 80 minutes to complete her math and science homework. The ratio of the amount of time she spent to complet
e her science homework to the amount the time she spent to complete her math homework was 3 : 2. How many minutes did she spend on her math homework?
2 answers:
32 minutes
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3+2 = 5
80/5 = 16
16 x 2 = 32 - math
16 x 3 = 48 - science
48 + 32 = 80 so she spent 32 minutes on math
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X + 3y = 7
x = -3y + 7
2x + 4y = 8
2(-3y + 7) + 4y = 8
-6y + 14 + 4y = 8
-2y = 8 - 14
-2y = - 6
y = -6/-2
y = 3
x + 3y = 7
x + 3(3) = 7
x + 9 = 7
x = 7 - 9
x = -2
solution is (-2,3)
Answer:
40, 41, 42
Step-by-step explanation:
x +x+1+x+2=123
3x+3=123
3x=123-3
3x=120
x=120:3
x=40(the first number
40+1=41 (the second number
40+2=42 (the third number
Answer:
(-9,-7)
Step-by-step explanation:
(x,y)—>(-x,-y)
(9,7)—>(-(9),-(7))=(-9,-7)
