All categories

4 years ago

If x+y = -1, and xy= -12, what is the value of (x+3) (y+3) ?

Mathematics

1 answer:

9966 [12]4 years ago

7 0

Answer:

Here are my hints. You can solve it yourself

1/ xy = -12 --> x = -12/y

2/ (-12/y) + y = -1 --> -(12/y) + (y²/y) = -1 --> -12 + y² = -y --> y²+y-12=0

3/ From y²+y-12=0 we can find y then use y to find x and then do your

(x+3) * (y+3)

You might be interested in

Premises: All flowers are beautiful. All roses are flowers. Conclusion: All roses are beautiful

Alona [7]

Answer:

The conclusion is valid because the set of roses lying inside beautiful.

The required diagram is shown below:

Step-by-step explanation:

Consider the provided statement.

Premises: All flowers are beautiful. All roses are flowers.

Conclusion: All roses are beautiful

It is given that All roses are flowers that means all roses are the subset of flowers.

Now, it is given that All flowers are beautiful, that means all flowers are the subset of beautiful.

Thus, the required conclusion will consist all roses are the subset of flowers and all flowers are the subset of beautiful.

Therefore, the conclusion is valid because the set of roses lying inside beautiful.

The required diagram is shown below:

3 0

3 years ago

Click on the picture which is the answer ?

Ksenya-84 [330]

Answer:

L = 4πa²b

Step-by-step explanation:

Multiply both sides by 4πa²b.

4 0

3 years ago

A new auditorium is begging built for a college the balcony has 200 seats the floor has 25 rows with x seats in each row the num

aliya0001 [1]

Question:

A new auditorium is being built for a college. The balcony has 200 seats. The floor has 25 rows with x seats in each row. The number of people in the auditorium must be under 750 to meet safety regulations. What is the solution of this inequality, and what is its meaning?

Answer:

$200 + 25x < 750$

Number of seats in a row must be less than 22

Step-by-step explanation:

Given

Total = Less than 750

Current Seats = 200

Rows = 25

Seat per row = x

Required

Represent as an inequality

The scenario will be represented as:

$Current\ Seats + Rows * x = Total$

Substitute 200 for Current Seats

$200 + Rows * x = Total$

Substitute 25 for Rows

$200 + 25* x = Total$

$200 + 25x = Total$

Substitute <750 for Total.

The equation then becomes

$200 + 25x < 750$

Solving further:

$25x < 750 - 200$

$25x < 550$

$x < \frac{550}{25}$

$x < 22$

This means that:

Number of seats in a row must be less than 22

3 0

3 years ago

1. Simplify

siniylev [52]

Answer:

a. -6

b. -4

c. 8

d. -20

e. 7

f. -10

g. 8

h. 12

i. -12

j. 5

3 0

3 years ago

Two trucks were driven on a 1,680 kilometer (km) trip. the first truck averaged 14 km per liter of fuel for the trip, and the se

kiruha [24]

for the first truck 1680 / 14 = 120 liters used

the second 1680 / 12 = 140 litres used

so 140-120 = 20 liters <span>the second truck used more </span>

8 0

3 years ago