When I multiply by 4, add 12, divide by 2, then square root, I get 10. What number did I start with?

22

Step-by-step explanation:

To begin, the most reasonable way of figuring out the answer is creating an equation.

In that case, we can represent all possible numbers with the variable "N"

We basically have that 4n + 12 divided by 2 = 100 (because 10^2 = 100)

Simplifying:

4n + 12  ÷  6 = 100

Multiplying each side by 6:

24n + 72 = 600

Subtracting 72:

528

Dividing by 24:

N = 22

Check:

22 * 4 =  88. 88 + 12 = 100. Square rooting gives 10. Thus, an answer that the number you started with was 22 is correct.

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt