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iragen [17]
3 years ago
15

3x^3 - 2y^-6x^2y^2+xy for x=2/3 and y=1/2

Mathematics
1 answer:
Dominik [7]3 years ago
4 0

Answer:

-13

Step-by-step explanation:

3x^3 - 2y^-6x^2y^2+xy

x=2/3 and y=1/2

Solve :

3x^3 - 2y^-6x^2y^2+xy

Put value of x and y in this equation

= 3(2/3)^3 - 2(1/2)^-6(2/3)^2(1/2)^2+(2/3)(1/2)

= -13

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Doris made 80 cookies this week. She baked 4 less than three times the total she made last week. Which equation, when solved for
sertanlavr [38]

Answer:

The equation is  3x-4=80

The value of x is 28 cookies

Step-by-step explanation:

Let

x ---->  the number of cookies she baked last week

we know that

The number of cookies she baked last week multiplied by 3 minus 4 must be equal to 80 cookies

so

The linear equation that represent this situation is

3x-4=80

solve for x

3x=80+4\\3x=84\\x=28\ cookies

3 0
3 years ago
Is (1, 6) a solution to this system of equations?<br> 5x + 2y = 17<br> x + 3y = 19<br> yes<br> no
Ulleksa [173]
Answer:
Yes

Explanation:
5x + 2y = 17

We are given the values (1, 6)

Substitute then into the equation

(I put a question mark to basically ask the question “is 5(1) + 2(6) equal to 17?”)

5(1) + 2(6) = 17?
5 + 12 = 17?
Yes!

Hope this helped and made sense :)
5 0
3 years ago
Read 2 more answers
What is the simple interest earned on $3,672 at 4.5% for three years?
olasank [31]

Answer: interest at the end of 3 years is $495.72

Step-by-step explanation:

The formula for simple interest is expressed as

I = PRT/100

Where

P represents the principal

R represents interest rate

T represents time in years

I = interest after t years

From the information given

T = 3 years

P = $3,672

R = 4.5%

Therefore

I = (3672 × 4.5 × 3)/100

I = 49572/100

I = 495.72

6 0
3 years ago
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Della by tree seedling that was 2 1/4 feet tall during the first year it grew 1 1/6 ft after two years it was 5 ft tall how much
jasenka [17]
<h2>Greetings!</h2>

Answer:

\frac{19}{12} feet

Step-by-step explanation:

First, we need to find the height after one year:

2.25 + 1 1/6 = \frac{41}{12}

Now to find the amount in the second year, we can subtract the above amount from 5:

5 - \frac{41}{12} = \frac{19}{12}

So in the second year it grew \frac{19}{12} feet


<h2>Hope this helps!</h2>
8 0
3 years ago
Simplify -4x - x. Plzzzz Help
Monica [59]

-4x - x

Combine like terms

= -5x

Hope it helps

7 0
3 years ago
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