In my neighbourhood, 90% of the properties are houses and 10% are shops. 10% of the houses are for sale and 30% of the shops are for sale. what percentage of the properties for sale are houses?

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

Need on this one asap im almost done with this subject

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.