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Natali5045456 [20]
3 years ago
14

Which expression represents the product of 2xy and 3xy+5y-xy^2

Mathematics
2 answers:
zheka24 [161]3 years ago
8 0
It’s D. Bc you’re multiplying 2xy to the whole second expression. And therefor you get D
galina1969 [7]3 years ago
4 0

Answer:

D. 6x2^2y^2 + 10xy^2 - 2x^2y^3

Step-by-step explanation:

You might be interested in
Please help! .........
stira [4]

Answer:

1) When x is 1, y is 4, and vice versa

2) When x is -6, y is 42, and when x is 7, y is 114

3) When x is -2, y is 2, and when x is 8, y is 42

Step-by-step explanation:

1)

y=x^2-6x+9

y+x=5 which can be rearranged as y=5-x.

Substituting this lone y into the first equation, you get:

5-x=x^2-6x+9

Move everything to one side:

x^2-5x+4=0

Factor:

(x-4)(x-1)=0

x=1, 4

y=4, 1

2)

y-30=12x which can be rearranged as y=12x+30.

y=x^2+11x-12

Let's use elimination this time and subtract the first equation from the second:

0=x^2-x-42

Factor:

(x-7)(x+6)=0

x=-6, 7

y= -42, 114

3)

y=x^2-2x+6

y=4x+10

Let's set the two equations equal to each other through substitution:

x^2-2x-6=4x+10

Move everything to one side:

x^2-6x-16=0

Factor:

(x-8)(x+2)=0

x=-2, 8

y= 2, 42

Hope this helps!

6 0
3 years ago
How many times does 7 go into 2,400
aksik [14]

Answer:

about 324 times.

Step-by-step explanation:

2400/7

342.857142857

4 0
3 years ago
Read 2 more answers
Y – 2 = 3(x - 1) <br><br>thank you​
PilotLPTM [1.2K]

Answer:

YOUR WELCOME

\:

7 0
3 years ago
Read 2 more answers
What is the solution to the equation?
Zielflug [23.3K]

Answer:

Exact form - \frac{25}{2}

Decimal form - 12.5

Mixed number form - 12\frac{1}{2}

Have a nice day.

4 0
3 years ago
The most recent poll of 50 randomly-selected members of a school club with a total of 80 members showed that 38 are planning to
melisa1 [442]

Answer with Explanation:

Total number of members in School Club = 80 members

Number of member randomly Selected,that is sample size used  (P) = 50 members

Number of members who are planning to vote for Talia = 38 members

Z Score for 95% confidence interval =1.96

it is given that Margin of Error ,E,of the poll using a 95% confidence interval=12%

E=\frac{Z*\sigma}{\sqrt{P}}\\\\ \frac{12}{100}=\frac{1.96 * \sigma}{\sqrt{50}}\\\\ \sigma=4.32890

Standard Deviation=4.3 (approx)

→95% confidence level for students who are planning to vote for Talia as president of the club lie between → 38 + 4.3 = 42.3 to 38 -4.3=33.7.

→So, members which will vote for Talia as president of the club lies between minimum of 33 members and maximum of 42 members.

5 0
3 years ago
Read 2 more answers
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