WILL GIVE BRAINLIEST PLZZZ HELP Which of the following problems can be solved using the equation x-9=15
a. The sum of two numbers is 15. If one of the numbers is 9, what is x, the other number?

b. David’s portion of the bill is $9 more than Jaleel’s portion of the bill. If Jaleel pays $9, find x, the amount in dollars that David pays.

c. Allison is 9 years younger than her sister Pam. Allison is 15 years old. What is x, Pam’s age?

D. Calvin owns 15 CDs. If he gave 9 of them to a friend, what is x, the number of CDs he has left?

Option D

Step-by-step explanation:

You can use the equation x - 9 = 15 for question number D.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

answer: 10 turtles

step-by-step explanation: as turtles have four legs so 4.10=40 therefore birds are 4 which sue counted