T M - time that Maria drove;
49 * t C + 52 * t M = 191
t C + T M = 3.8 hours
t C = 3.8 - t M
49 * ( 3.8 - t M ) + 52 * t M = 191
186.2 - 49 t M + 52 t M = 191
3 t M = 191 - 186.2
3 t M = 4.8
t M = 4.8 : 3
t M = 1.6 hours
Answer:
Maria drove 1.6 hours.
<span>Differentiate implicitly:
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<span>
Solve for y
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<span>When the tangent is parallel to the x-axis we have y'=0, so we must solve
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<span>To find the actual value of x we plug this expression for y into the original equation
</span>
<span>Plugging this into the formula for y above gives the points
</span>
<span>which is where our tangent will be parallel to the x-axis.</span>
<span>
</span>
Answer: search; d e s m o s.com
Step-by-step explanation: Use this site to graph the points! :)
Answer:
3:4, 15:20, 60:80
Step-by-step explanation:
If a train is traveling 8 miles every 6 minutes then you find the ratio 6:8 to find the first answer you divide both numbers by two. To find the second number you multiply the 3:4 by five, and to find the third number you multiply the 3:4 by 20.
3:4
15:20
60:80