3 years ago

Tom and JAERRY SHARE 56KD in the ratio 4:3

Mathematics

1 answer:

expeople1 [14]3 years ago

3 0

a) 4:3 so 4+3= 7

56÷7=8

final answer : 8

b) 3×8 = 24

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If (x + y)^2 = 105 and x^2 + y^2 = 65, what is the value of xy?

lesya692 [45]

$\boxed { \boxed {(a + b)^2 = a^2 + 2ab + b^2}}$

$(x + y) ^2 = 105$

$x^2 + 2xy + y^2 = 105$

$x^2 + y^2 + 2xy = 105$

$\text{Given that } x^2 + y^2 = 65,$

$65 + 2xy = 105$

$2xy = 105 - 65$

$2xy = 40$

$xy = 20$

$\boxed { \boxed {\text{Answer: xy = 20}}}$

8 0

3 years ago

Please help!!

Fudgin [204]

Answer:

C=13

Step-by-step explanation:

Pythagorean theorem

a^2 + b^2=c^2

a squared plus b squared equals c squared