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3 years ago

Evaluate the polynomial when x = 3 and y = - 8x2 + y2 + xy

Mathematics

2 answers:

zalisa [80]3 years ago

8 0

Answer:

Step-by-step explanation:

We are given the polynomial:

$x^2+y^2+xy$

We want to evaluate when x=3 and y= -8. Therefore, we must substitute 3 for each x and -8 for each y.

$(3)^2+(-8)^2+(3*-8)$

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

Solve the parentheses first. Multiply 3 and -9.

3*-8=-24

$(3)^2+(-8)^2 + -24$

$(3)^2+(-8)^2-24$

Now, solve the exponents.

3^2= 3*3 =9

$9+ (-8)^2 -24$

-8^2= -8*-8= 64

$9+64-24$

Add 9 and 64

$73-24$

Subtract 24 from 73

$49$

The polynomial evaluated for x=3 and y= -8 is 49.

Ivahew [28]3 years ago

5 0

<h3>Answer: 49</h3>

Work Shown:

Replace x with 3, replace y with -8. Use order of operations PEMDAS to simplify.

x^2 + y^2 + x*y

3^2 + (-8)^2 + 3*(-8)

9 + 64 - 24

73 - 24

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If a and b are odd integers, then a – b is an even integer.

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So the answer choices are
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not even=odd so choice 5 is really a-b=odd
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then both are odd
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an even number is represented as 2n where n is an integer
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you are left with odd
using integers
7 and 11
11-7=4
even

so odd-odd=even, it depends on weather you consider 0 odd or even

so the asnwers are:
a and b are odd
a-b is not an even integer

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A scatter diagram has points that show the relationship between two sets of data.

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where <em>x</em> is the average number of employees in a group health insurance plan and <em>y</em> is the average administrative cost as a percentage of claims.

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Step 3: Use the following equations to find intercept a and slope b:

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3 years ago

Evaluate the polynomial when x = 3 and y = - 8x2 + y2 + xy​

Evaluate the polynomial when x = 3 and y = - 8x2 + y2 + xy