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3 years ago

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Your teacher asks the class to evaluate the expression. Your classmate gives an incorrect answer of 256. Evaluate the expression

. Then find the likely error

1 answer:

Leya [2.2K]3 years ago

8 0

Answer:

What expression?

Step-by-step explanation:

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The length of the rectangle is three times its width.The perimeter of the rectangle is at most 112 cm .

Slav-nsk [51]

Option D is the correct answer

$2w+2.(3w)\leq 112$

Further explanation:

Let

$l\ be\ the\ length\ of\ rectangle\\and\\w\ be\ the\ width\ of\ rectangle$

The perimeter of a rectangle is given by:

$P=2w+2l$

It is also given that:

$P\leq 112$

So we can write as

$2l+2w\leq 112$

We also know that The length of the rectangle is three times its width

$l=3w$

Putting the value of l in the inequality

$2.(3w)+2w\leq 112$

Rearranging the terms

$2w+2.(3w)\leq 112$

Hence, option D is the correct answer.

Keywords: Inequalities, Perimeter

Learn more about inequalities at:

#LearnwithBrainly

5 0

3 years ago

Svetllana [295]

Answer:

The formula to find the value of the side is X ^ 3 = 10, and the side measures 2.15 cm.

Step-by-step explanation:

Given that a Rubik's Cube has a volume of 10 cm, to write an equation to find the length of the sides and find the length of the side to the nearest tenth, the following calculations must be performed, knowing that the volume of a cube is obtained to enhance one of its sides to the third:

X ^ 3 = 10

X = 3√ 10

X = 2.15

Thus, the formula to find the value of the side is X ^ 3 = 10, and the side measures 2.15 cm.

4 0

3 years ago

Do you like dough nuts or not I am just doing a survey

Scilla [17]

Answer:

yea I like them half of the time

3 0

3 years ago

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Please help!!!!!!!!!!

blsea [12.9K]

Answer:

Step-by-step explanation:

a) x = 1.786 & -1.120

Explanation:

Turning points are points where the derivative equals zero. Solving the derivative for the values of X will give the answer to part a.

The derivative of this equation $x^3 =x^2-6x[/t[tex] is [tex]3x^2+2x-6$ .

Solving the equation $3x^2+2x-6=0$ using the quadratic formula we get 1.786 & -1.120

b) x = -3, x=0 and x=2

Explanation:

The solution to this equation are the points where the graph intersects with the x axis. Looking at the graph we can see that these points are -3 , 0 and 2

3 0

3 years ago

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A $280 suit is marked down by 30%. Find the sale price.<br> The sale price is $

storchak [24]

Answer:

84

Step-by-step explanation:

30% * $280

$\frac{}{100}$

= 84

So, the sale price is $84

3 0

3 years ago

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