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stellarik [79]
4 years ago
5

Find the unit rate of $4.80 for 4

Mathematics
2 answers:
-Dominant- [34]4 years ago
7 0
Though I do not think that we have the full question here, if we have 4 anything and the total cost is $4.80, we can solve for the unit rate.

What we do is we take the $4.80 and we divide it by the number of units (or anything) that we have - in this case it is 4.

\frac{4.80}{4}=1.20

So we know that the unit rate is $1.20.
serious [3.7K]4 years ago
3 0
The unit rate for $4.80 for 4 is $1.20 for each individual object.
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iragen [17]
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3 years ago
4. A store had 86 DVDs and 52 CDs. When the equal number of DVDs and CDs were sold,
11Alexandr11 [23.1K]

Answer:

51 DVDs

Step-by-step explanation:

Let the number of DVDs and CDs sold be x each.

<u>Initial</u>

Number of DVDs= 86

Number of CDs= 52

<u>After selling</u>

Number of DVDs= 86 -x

Number of CDs= 52 -x

Given that there are 3 times as many DVDs than CDs left,

86 -x= 3(52 -x)

<em>Expand:</em>

86 -x= 156 -3x

<em>Bring x terms to 1 side, constant to the other:</em>

3x -x= 156 -86

<em>Simplify:</em>

2x= 70

<em>Divide both sides by 2:</em>

x= 35

Amount of DVDs left

= 86 -x

= 86 -35

= 51

3 0
4 years ago
Each side of a square is increasing at a rate of 8 cm/s. At what rate (in cm2/s) is the area of the square increasing when the a
statuscvo [17]

Answer:

Step-by-step explanation:

This is nice and simple. I'm going to walk through it like I do when teaching this concept to my class for the first time. This is a good problem for that.

We are given a square and we are looking for the rate at which the area is increasing when a certain set of specifics are given. That means that the main equation for this problem is the area of a square, which is:

A=s^2 where s is a side.

Since we are looking for the rate at which the area is changing, \frac{dA}{dt}, we need to take the derivative of area formula implicitly:

\frac{dA}{dt}=2s\frac{ds}{dt} that means that if \frac{dA}{dt} is our unknown, we need values for everything else. We are given that the initial area for the square is 49. That will help us determine what the "s" in our derivative is. We plug in 49 for A and solve:

49=s^2 so

s = 7

We are also given at the start that the sides of this square are increasing at a rate of 8cm/s. That is \frac{ds}{dt}. Filling it all in:

\frac{dA}{dt}=2(7)(8) and

\frac{dA}{dt}=112\frac{cm^2}{s}

5 0
3 years ago
Read 2 more answers
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e-lub [12.9K]

Answer:

-13

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Step-by-step explanation:

A x = B

To find X

A ^ -1 A  x = A ^ -1 B

x = A^ -1 B

x = -3/2  -5/2      2

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Across times down

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7 0
4 years ago
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The answer would be

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