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Gnesinka [82]
3 years ago
6

Your classmate is starting a new fitness program. He is planning to ride his bicycle 60 minutes every day. He burns 7 calories p

er minute bicycling at 11 mph and 11.75 calories per minute bicycling at 15 mph. How long should he bicycle at each speed to burn 600 calories per hour?
Mathematics
1 answer:
zaharov [31]3 years ago
6 0
Let the time he spent bicycling at 11 mph be x and the time spent bicycling at 15 mph be y, then
x + y = 60 . . . (1)
7x + 11.75y = 600 . . . (2)
(2) x 7 => 7x + 7y = 420 . . . (3)
(2) - (3) => 4.75y = 180
y = 180 / 4.75 = 38
x = 60 - 38 = 22

Therefore, he should bicycle 22 minutes at 11 mph and 38 minutes at 15 mph.
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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DaniilM [7]
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\bf \begin{array}{lllll}
&x_1&y_1\\
%   (a,b)
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\end{array}
\\\quad \\\\ % slope  = m
slope = {{\boxed{ m}}}= \cfrac{rise}{run} \implies 
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\\ \quad \\\\
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for 2)

\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ -3}}\quad ,&{{ 17}})\quad 
%   (c,d)
&({{ -7}}\quad ,&{{ 37}})
\end{array}
\\\quad \\\\
% slope  = m
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One side of a triangle is increasing at a rate of 9 cm/s and a second side is decreasing at a rate of 2 cm/s. if the area of the
LenKa [72]
Use the attached figure to guide yourself through the explanation. In the figure:
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