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Bess [88]
3 years ago
5

Help what’s this answer

Mathematics
1 answer:
Kryger [21]3 years ago
6 0
The answer is 9 and that on period
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What are the units for the variable in the following scenario?
lisabon 2012 [21]

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Her grocery bill is $4.62

Step-by-step explanation:

The first step is to multiply 6 and .43 to get how much it was for all of the apples.

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y=-x

Step-by-step explanation:

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3 years ago
The length of a rectangle is increasing at a rate of 9 cm/s and its width is increasing at a rate of 7 cm/s. When the length is
Hunter-Best [27]

Answer:

<em>129 </em>cm^2/s

Step-by-step explanation:

Increasing rate of length, \frac{dl}{dt}= 9 cm/s

Increasing rate of width, \frac{dw}{dt} = 7 cm/s

Length, l = 12 cm

Width, w = 5 cm

To find:

Rate of increase of area of rectangle at above given points.

Solution:

Formula for area of a rectangle is given as:

Area = Length \times Width

OR

A = l \times w

Differentiating w.r.to t:

\dfrac{d}{dt}A = \dfrac{d}{dt}(l \times w)\\\Rightarrow \dfrac{d}{dt}A = w \times \dfrac{d}{dt}l +l \times \dfrac{d}{dt}w

Putting the values:

\Rightarrow \dfrac{dA}{dt} = 5 \times 9 + 12 \times 7\\\Rightarrow \dfrac{dA}{dt} = 45 + 84\\\Rightarrow \bold{\dfrac{dA}{dt} = 129\ cm^2/sec}

5 0
2 years ago
You are selling candy bars for a fundraiser. you want to sell at least $200. If snickers cost $2 per bar and M&amp;M's cost $3 p
sveticcg [70]

Answer:

Step-by-step explanation:

Goal = > $2500

Amount raised = $700

Amount needed to raise = $2500 - 700 = $1800

Number of candy bars needed = x

Price of a candy bar = $1.50

1.5x > 1800

x > 1800 ÷ 1.5

x > 1200

Answer: They need to sell more than 1200 candy bars.

6 0
2 years ago
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