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nadya68 [22]
3 years ago
9

How do you solve the equation 0.4(2x+0.5)=3[0.2x+(-2)]-4

Mathematics
2 answers:
dusya [7]3 years ago
6 0
 <span>0.4(2x+0.5)=3[0.2x+(-2)]-4 
</span>
 <span>0.8x+0.2=0.6x-6-4 </span> 
<span>
0.8x-0.6x=-6-4-0.2 
</span>
 <span>0.2x=-10.2 </span> 
<span>
x=-10.2/0.2 
</span>
 <span>x=-51</span>
sergey [27]3 years ago
6 0
0.4(2x+0.5)=3[0.2x+(-2)]-4<span>

</span>0.8x+0.2=0.6x-10

0.2x=-10.2

x= \frac{-10.2}{0.2}

x=-51
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56 points for whoever answers correctly !
vladimir2022 [97]

We need to use what we know about rectangles to get:

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2) area = 2*W^2 + 24ft*W + 64ft^2

<h3>Working with rectangles:</h3>

We know that rectangles are defined by two measures, width W and length L.

Here we do know that the length of the pool is twice the width, and the width is W, then the length of the pool is:

L = 2*W

And we also have a sidewalk of 4ft all around the pool, now we want to get:

1) The total length and the total width.

This will be equal to the length/width of the pool <u>plus twice the width of the sidewalk</u> (we add it twice because is in both ends) then we have:

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2) Now we want to get an expression for the total area of the pool.

Remember that for a rectangle the area is just the product between the width and the length, so to get the area of the pool with the sidewalk we just take:

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area = (2*W + 8ft)*(W + 8ft) = 2*W^2 + 3*W*8ft + 64ft^2

area = 2*W^2 + 24ft*W + 64ft^2

This is the equation that gives the total area as a function of W, the width of the pool.

If you want to learn more about rectangles, you can read:

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2 years ago
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Gre4nikov [31]

In this picture dots are clearly shown the frequency of the concert.

<h3>What is Frequency?</h3><h3>Frequency refers to the number of times an event or a value occurs. A frequency table is a table that lists items and shows the number of times the items occur.</h3>

Here, in given data about the six concerts

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    1                               2

    2                              1

    3                              1

Thus, on number line we mark 2 dots on zero, 2 dots on one, 1 dot on two and 1 dot on 3.

Learn more about Frequency from:

brainly.com/question/5102661

#SPJ1

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Step-by-step explanation:

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To find the best fit, draw a line through the center of the most points. This line will have as its y-intercept a value around 12 and a gentle slope. This means the answer choice is C.

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