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Vadim26 [7]
3 years ago
13

Solve for r. 12-1/5r=2r+1

Mathematics
2 answers:
LuckyWell [14K]3 years ago
6 0

Answer:

r=5

Step-by-step explanation:

hope this helps!

9966 [12]3 years ago
5 0

Answer:

r = 5

Step-by-step explanation:

I hope this helps djndjdnnznz

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In the diagram, CD = 15 and CF = 39. If line DF is tangent to point C, then DF = ?
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I hope this helps you


DF^2+DC^2=FC^2



DF^2+15^2=39^2


DF^2=39^2-15^2


DF^2=24.54


DF=36
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Debbie has equal numbers of dimes and quarters with a total value of $1.40. How many coins does she have altogether?
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A science class is tracking the progress of plant growth. The class starts the experiment with a plant five centimeters high. Th
Liono4ka [1.6K]

Answer:

A

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8 0
3 years ago
A company's revenue from selling x units of an item is given as R=1700x-2x^2 . If sales are increasing at the rate of 25 units p
viva [34]

Answer:

The daily rate is: 17500 units per day

Step-by-step explanation:

Given

R = 1700x - 2x^2

\frac{dx}{dt} = 25

Required

Find \frac{dR}{dt} when x = 250

We have:

R = 1700x - 2x^2

Differentiate both sides with respect to time

\frac{dR}{dt} = 1700\frac{dx}{dt} - 4x\frac{dx}{dt}

Factorize

\frac{dR}{dt} = (1700- 4x)\frac{dx}{dt}

Substitute: \frac{dx}{dt} = 25 and x = 250

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\frac{dR}{dt} = (1700- 4*250)*25

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\frac{dR}{dt} = 17500

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3 years ago
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