Wesley estimated 5.82 - 4.21 to be about 2 is this an overestimate or an underestimate explain?

Mathematics

2 answers:

kirill [66]3 years ago

8 0

Answer:

Wesley made the correct estimation if numbers are rounded off.

He did over estimation, if normal calculation is considered.

Step-by-step explanation:

Wesley estimated 5.82 - 4.21 to be about 2.

Let us make fair estimations in round figures.

5.82 can be rounded to 6.

4.21 can be rounded to 4.

Now, $6-4=2$

In other way, we can see that $5.82-4.21=1.61$

Here he over estimated.

Trava [24]3 years ago

7 0

Overestimate because the answer is 1.61

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A rectangular poster is to contain 722 square inches of print. the margins at the top and bottom of the poster are to be 2 inche

Delvig [45]

Let
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y ----------> the width of the whole poster

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A(x)=x*y--------->A(x)=x*{[722/(x-4)]+2}
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find the derivative------> A1 (x)
A1(x)=2*[8x²-8x-1428]/[(x-4)²]

for A1(x)=0
8x²-8x-1428=0
using a graph tool
gives x=13.87 in

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y=[2x+714]/[x-4]-----> y=[2*13.87+714]/[13.87-4]-----> y=75.15 in

the answer is
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6 0

3 years ago

Please help easy stuff.......

nataly862011 [7]

To evaluate a function at a given input, you have to substitute every occurrence of the variable with that particular value.

So, for the first function, you have

$T(x) = -x-2 \implies T(-4) = -(-4)-2 = 4-2 = 2$