Which statement correctly describes mass-energy equivalence? All energy in the universe will be converted to an equivalent amount of mass.
O Mass can decrease in nuclear changes without the production of energy.
O All energy in the universe is a result of mass being converted into energy.
O A large amount of mass is equivalent to a small amount of energy.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

you are uyytr tyy

step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

4+4+2x

or

2x+8

step-by-step explanation: