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ollegr [7]
3 years ago
13

Help plss (100pts) Direct variation

Mathematics
2 answers:
sasho [114]3 years ago
8 0
Is an inverse variation because the increase in points is not constant, thusly it is not a direct variation (appearently i can still answer?)
antiseptic1488 [7]3 years ago
7 0
No that is an inverse variation, a direct variation must have a y that is directly proportional to x while the picture shows a y that is inversely proportional to x <span />
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Grace and Zoe like to jump rope grades jump 66 times a minute Zoe jumps 56 times a minute they both Count Their jumps today and
san4es73 [151]

Answer:

Grace jumps for 9 minutes.

Zoe jumps for 12 minutes.

Step-by-step explanation:

Let the time for which Grace jumps the rope = x minutes

Let the time for which Zoe jumps the rope = y minutes

As per question statement:

x+y=21 ..... (1)

Number of times Grace jumps in one minute = 66

Number of times Zoe jumps in one minute = 56

Number of times Grace jumps in x minutes = 66

Number of times Zoe jumps in y minutes = 56

As per question statement:

66x+56y=1266 ...... (2)

Multiplying equation (1) with 66 and subtracting equation (2) from it:

10y = 1386 - 1266\\\Rightarrow 10y=120\\\Rightarrow  y =\bold{12\ min}

By equation (1):

x=21-12=\bold{9\ min}

Therefore, the answer is:

Grace jumps for 9 minutes.

Zoe jumps for 12 minutes.

5 0
3 years ago
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