You have a coupon for an additional 25% off the price of any sale item at store. the store has put a robotics kit on sale for 15% off the original price of $40. what is the price of the robotics kits after both discounts?

Firstly we need to count how much is 15% from $40:

40 * 15% =
= 40 * 15/100 =
= 40 * 3/20 =
= 2 * 3/1 =
= 2 * 3 =
= 6 [dollars]

So the kit costed $40 - $6 = $34 after the first general discount. Now the question is if the coupon relates to the original price or to the lowered price. We'll do both:

If it relates to the original price, we need to find how much is 25% of $40. We can do it in mind - it's $10. So with two discounts the price would be $40 - $6 - $10 = $24.

However, if it relates to the lowered price, we need to find how much is 25% from $34:

34 * 25% =
= 34 * 25/100 =
= 34 * 1/4 =
= 8.5 [dollars]

So the final price in such a situation would be $40 - $6 - $8.5 = $25.5.

Dang i wish i could , good luck (i’m bad at math)

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.