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aksik [14]
3 years ago
12

Tanya is buying a skateboard for $42.38,a helmet for $17.60,and a set of elbows an nee pads for $12.89.She estimates the total c

ost to be about $71.Is her estimates higher or lower than her actual cost?Explain
Mathematics
1 answer:
Mila [183]3 years ago
4 0
Her estimate is lower than her actual cost because her total is 72.87 she is off by 1.72 because she only added 42,17,and 12 and forgot all about adding the cent or the .60,.38,and the .89.
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10x + x^4/x-2

Step-by-step explanation:

Combine like terms

(10x + x^4)/(x-2)

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1 year ago
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3 years ago
How do you add a fraction and a whole? Please explain step by step to get marked as brainliest
Dimas [21]

Step-by-step explanation:

How do you add a fraction and a whole number?

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Whole numbers are all natural numbers including 0.

A fraction represents a numerical value, which defines a part of a whole.

Answer: To add a fraction to a whole number, convert the whole number into a fraction, form a common denominator, and then add the two numerators.

Let's look into the steps to add a fraction to a whole number.

Explanation:

Convert the whole number into a fraction by taking the denominator as 1.

Compare the denominators and make them common so that they become like fractions.

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Example: Add 2/15 and 5

Step 1: Converting the whole number into a fraction.

5 in terms of a fraction is written as 5/1

Step 2: Make the denominator common.

Since, 2/15 has 15 as the denominator, hence, we need to make the denominator of 5/1 as 15

Multiplying numerator and denominator with 15 we get,

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5 0
2 years ago
What is the area of the largest rectangle with lower base on the x-axis and upper vertices on the curve y = 27 - x2?
statuscvo [17]
The answer is 54 square units.
let the vertex in quadrant I be (x,y) 
<span>then the vertex in quadratnt II is (-x,y) </span>
<span>base of the rectangle = 2x </span>
<span>height of the rectangle = y </span>
<span>Area = xy </span>
<span>= x(27 - x</span>²<span>) </span>
<span>= -x</span>³<span> + 27x </span>
<span>d(area)/dx = 3x</span>²<span> - 27 </span><span>= 0 for a maximum of area </span>
<span>3x</span>²<span> = 3 x 3</span>² = <span>27 </span>
<span>x</span>²<span> = 9 </span>
<span>x = ±3 </span>
<span>y = 27-9 = 18 </span>
So, the largest area = 3 x 18 = 54 square units
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3 years ago
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