Iris wants to buy sneakers at $15 each and high heels at $30 each. Write an algebraic expression to find the total cost of the shoes if she buys x sneakers and y high heels. Write your answer in the form “ax + by” where a and b are positive or negative constants.

30y + 15x

If x is for sneakers, and y is for high heels, plug 15 in for a and 30 in for b. This means that x is how many sneakers she buys, and y is how many high heels she buys. The equation altogether represents the total amount of her purchases.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right