The sum of twice a number and a second number is 61. the second number is 17 less than four times the first. what are the two numbers?

We have two numbers, let's say a and b.

We must build our equations.

Sum = addition, and twice = multiplication, so:

where a represents "twice a number"

Less = subtraction, and four times = multiplication, so:

Now we have our two equations:

One of these is already solved for a variable, so we can substitute it.

Substitute b into the first equation:

We have solved for a's int value, being 13.

Plug a into the second equation and solve for b:

We have solved for b's integer value, 35.

Now that we have both numbers, let us check our solution:

a = 13

b = 35

The sum of twice a number and a second number is 61:

13(2) + 35 = 26 + 35 = 61 ✓

The second number is 17 less than four times the first:

35 = 4(13) - 17 = 52 - 17 = 35 ✓

Our answers are:

a = 13

b = 35

it would take 7/10 of an hour too fill the pool.

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.