Twice jack's age plus 5 is 21. write and solve an equation. how old is jack? a) 8 b) 13 c) 32 d) 52

Jack is 8 years old (option A)

Step-by-step explanation:

Hi, to answer this question we have to write an equation using the information given:

Twice : Means that the age of jack (j) is multiplied by 2 (2j),  

Plus 5: we have to add 5 (2j+5).  

Is 21: all is equal to 21.

Mathematically speaking:

2j +5 =21

Solving:

2j =21-5

2j =16

j= 16/2

j=8

Option A). 8

Feel free to ask for more if needed or if you did not understand something.

to find the unit price, we must figure out the cost of one item (in this case one dish towel).   to do this, we divide the total price ($7.92) by the number of items bought (for this problem it is 8, because there are eight dish towels in one pack).  

$7.92/8 = $0.99

therefore, the unit price, or the price of one dish towel, is $0.99.

hope this !

answer: for each 3 girls there is 2 boys . 3: 2

hope this ! (:   mark me as brainliest if you can