Marla has $4.55 in dimes and quarters. if she has 7 more quarters than dimes, how many quarters does she have?

She have 15 quarters.

Step-by-step explanation:

Given:

Marla has $4.55 in dimes and quarters.

Now, to find the quarters she have, if she has 7 more quarters than dimes.

Let the number of dimes be .

And the number of quarters be .

As the value of dime = $0.10.

And the value of quarter = $0.25.

So, according to question:

⇒

⇒

⇒

Subtracting both sides by 1.75 we get:

⇒

Dividing both sides by 0.35 we get:

⇒

Thus, the number of dimes = 8.

And the number of quarters = = 7+8 = 15.

Therefore, she have 15 quarters.

i can answer this question sweetie!

step-by-step explanation:

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.