How to solve for -3x squared + 2y squared + 5xy - 2y + 5x squared - 3y squared when x = 0.5 and y = -1/10??

Mathematics

1 answer:

Pani-rosa [81]3 years ago

5 0

Answer:

0.44

Step-by-step explanation:

-3x^2 + 2y^2 + 5xy - 2y +5x^2 - 3y^2

Combine like terms

-3x^2 + 5x^2 = 2x^2 2y^2 - 3y^2 = -1y^2

2x^2 - 1y^2 + 5xy - 2y

Now plug in the solutions Note: it is easier if you have all decimals or all fractions (-1/10=-.1

2(0.5)^2 - 1(-0.1)^2 + 5(0.5)(-0.1) - 2(-0.1)

Simplify:

0.5 - 0.01 - 0.25 + 0.2

0.5 + 0.2 - 0.01 - 0.25

0.7 - 0.26

0.44

You might be interested in

You deposit $900 in a savings account. The account earns 4% simple interest per year. What is the balance after 8 years? What is

xeze [42]

$900+ $288( interest after 8 years)= $1, 188( total balance)

8 0

3 years ago

First let's go on a trip you have $10,000 US to take with you look up the current exchange rate of US dollars to see dollars wha

deff fn [24]

So the exchange rate from one US dollar to a Canadian dollar is equal to 1.30 Canadian dollars. So in this current situation if you swapped all of your US dollars for Canadian dollars you would have $13000 Canadian dollars

8 0

3 years ago

Help me in number 8 plzz

Karo-lina-s [1.5K]

8a) The monthly rainfall is 3.6

8b) Deviation for May is 1
Deviation for June is 2.725
Deviation for July is 0.65

8c) Yes, the average annual rainfall was exceeded by 0.525

Please give me a rating if this helped

5 0

3 years ago

Simplify and state the excluded values: 12x^3 - 12x/ 28x^3-56x^2+28x

Eddi Din [679]

12x³ - 12x = 3/7 - 1/56x² - 3/7 = 3/7 - 3/7 - 1/56x² = -1/56x²
28x³ - 56x² + 28x

8 0

3 years ago

ABC ~ DEF and the scale factor from ABC to DEF is 1/2, what are the lengths of DE

Likurg_2 [28]

Answer:

Step-by-step explanation:

ABC ~ DEF means that ABC and DEF are the same triangle either expanded or contracted.

In this case the scale factor is 1/2. That means DEF is half ABC.

Since AB = 26 then DE must be 26/2 = 13

6 0

3 years ago