Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Two students in the same Spanish class, Chloe and Diane, plan to get together after school to make vocabulary flashcards. Chloe started on the project yesterday and has already made 5 flashcards. Diane hasn't started yet. Since Chloe makes 4 flashcards per minute and Diane makes 9 flashcards per minute, Diane will soon have the same number of flashcards. How many flashcards will each student have at that point? How long will that take?

Chloe and Diane will each have BLANK
flashcards in BLANK
minutes.

after 1 minute they will both have 9

Step-by-step explanation

1 minute  

5             9

+      

4

9                   9        

9 flashcards is how many each student will have to make.

It will take 1 minute

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.