What is the x-coordinate of the solution for the system of equations?

{y−x=9
{10+2x=−2

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x =

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

For each proportion find the unknown number x 1/5/8=×/15

Your client has saved $1,860 for a down payment on a house. a government loan program requires a down payment equal to 3% of the loan amount. what is the largest loan amount that your client could receive with this program