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il63 [147K]
2 years ago
14

What is the rate of change between interval 4 and 7 ?

Mathematics
2 answers:
DIA [1.3K]2 years ago
4 0

Answer:

Rate of change = 75%

(V1) = 4

(V2) = 7

NEED:

Rate of change.

= [(V2 - V1) / V1]100

= [(7 - 4) / 4]100

= [(3) / 4]100

= [0.75]100

Rate of change = 75%

slamgirl [31]2 years ago
3 0

Answer:

Rate of change = 75%

Step-by-step explanation:

Given:

First value (V1) = 4

Final value (V2) = 7

Find:

Rate of change.

Computation:

⇒ Rate of change = [(V2 - V1) / V1]100

⇒ Rate of change = [(7 - 4) / 4]100

⇒ Rate of change = [(3) / 4]100

⇒ Rate of change = [0.75]100

Rate of change = 75%

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the area of a rectangle is 90 in2^. the ratio of the length to the width is 5:2. find the length and the width
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Length and width of rectangle is 15 inches and 6 inches respectively

<h3><u>Solution:</u></h3>

Given that area of a rectangle is 90 square inch

Ratio of length to the width = 5: 2.

Need to determine length and width of rectangle.  

As ratio of length to the width is 5 : 2

Lets assume length of rectangle = 5x inches and width of rectangle = 2x inches.

<em><u>The formula for area of rectangle is given as:</u></em>

\text { Area of rectangle }=\text { length of rectangle } \times \text { width of rectangle}

Substituting the given value of area of rectangle and assumed value of length and width of rectangle we get:

\begin{array}{l}{90=5 x \times 2 x} \\\\ {=>90=10 x^{2}}\end{array}

On solving the above expression for x we get

\begin{array}{l}{=>\frac{90}{10}=x^{2}} \\\\ {=>x^{2}=9} \\\\ {=>x=\sqrt{9}=3}\end{array}

\begin{array}{l}{\text { Length of rectangle }=5 \times x=5 \times 3=15 \text { inches }} \\\\ {\text { Width of rectangle }=2 \times} x=2 \times} 3=6 \text { inches }}\end{array}

Hence length and width of rectangle is 15 inches and 6 inches.

4 0
3 years ago
Substitution and elimination
nlexa [21]
Whats The Question ????
3 0
3 years ago
The accountant charged $35 for the first hour of work and $23 for each hour after that.He earned a total of$127 how many hours d
dexar [7]

Answer:

He worked a total of 5 hours.

Step-by-step explanation:

The first hour the man makes $35 dollars for the first hour then for the other hours he earns $23 dollars, right? So we start off with 35.

35 = one hour.

35 + 23 = 2 hours .  =  58.

35  + 23 + 23 = 3 hours. =  81.

35 + 23 + 23 + 23 = 4 hours.  =  104.

35 + 23 + 23 + 23 + 23 = 5 hours. =  127.

We were looking for if the man earned $127 dollars how many hours would be be working.


He'd be working 5 hours.

Hope this helps (:


5 0
3 years ago
2x+3y is greater than or equal to 500 simplified
madreJ [45]
Its already simplified
3 0
3 years ago
Tracy needs to find the length and width of the equipment storage room where she works. The room is 2 meters longer than it is w
____ [38]

Answer:

3 meters

Step-by-step explanation:

We assume the storage room is a rectangle, like most rooms, no indication it is otherwise.

We know it's a rectangle and not a square because it is longer than wide.

We have the perimeter measurement (16 meters).

So, we can make the following equation:

2x + 2y = 16

x being the width of the room, y being it's length.  A perimeter is the sum of all sides.

We also know the room is 2 meters longer than wide... so:

y = x + 2

If we replace y in the first equation by its value relative to x, we get:

2x + 2(x + 2) = 16 which becomes

2x + 2x + 4 = 16

4x =12

thus x = 3

Width: 3 meters

Length: 5 meters.

Confirms the 16 meters perimeter.

5 0
3 years ago
Read 2 more answers
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