2 years ago

Find the value of x²+y² if x+y=9 xy=14

Mathematics

1 answer:

vekshin12 years ago

8 0

Step-by-step explanation:

It's a system of equations.

From the first one we isolate x:

x = 9-y

And we substitute in the second one:

(9-y)y = 14

-y^2 + 9y - 14 = 0

y^2 - 9y + 14 = 0

D = 25

y1/2 = (9 +- 5)/2 = 2 or 7

y = 2 => x = 7

y = 7 => x = 2

x^2 + y^2 = 7^2 + 2^2 = 53

You might be interested in

Quick i need help thank you, i wil give branliest

Nostrana [21]

The answer to this is B

8 0

3 years ago

Read 2 more answers

Help please n ty :P<br> sdhgfahedgewkgfzndb

Ugo [173]

Answer:

$y=-3.2\\\\y=-2.2\\\\y=-1.8$

Step-by-step explanation:

Insert the given x values for the given equation to find the corresponding y coordinate:

$y=0.2x-2$

$x:-6,-1,1$

Insert -6:

$y=0.2(-6)-2$

Simplify multiplication (when multiplying a negative and a positive, the result will always be negative):

$y=-1.2-2$

Simplify (when subtracting from a negative number, add the values, but keep the negative symbol):

$y=-3.2$

Insert -1:

$y=0.2(-1)-2\\\\y=-0.2-2\\\\y=-2.2$

Insert 1:

$y=0.2(1)-2\\\\y=0.2-2\\\\y=-1.8$

:Done

3 0

2 years ago

What is the converted metric unit for 75 cm

STALIN [3.7K]

Answer:

To inches?

Step-by-step explanation:

75 cm = is about like 30 inches

7 0

2 years ago

What is the product of -3 and 5

weeeeeb [17]

Answer:

45 is the correct answer

6 0

2 years ago

Read 2 more answers

Find the value of the trig function indicated

taurus [48]

Answer:

Step-by-step explanation:

base x height divided by 2

4x3=12

12 divided by 2 = 6

6x5= 30

6 0

3 years ago

Read 2 more answers

Find the value of x²+y² if x+y=9 xy=14​

Find the value of x²+y² if x+y=9 xy=14