Is this set closed or not closed under the operation? Negative integers under multiplication

X divided by A equals Y plus ZX divided by B

What's the expression for 150 decreased by the quantity of 6 plus b

n 1917 the cost of a first-class postage stamp was 3¢. In 1974 the cost for a first-class postage stamp was 10¢. What is the percent of increase in the cost of a first-class postage stamp?

3 (2y-3) = 27can u solve this one

Cost of 35 envelopes is rs105. How many envelop can be purchased for rs 99

Colin and Brian were playing darts colin scored 74 brian scored 66 less then Colin what's there combined score

Find the value of the variable if P is between J & K.

A rectangle has an area of 54 feet. What could be the dimensions of it?

What does the left y-axis represent? What does the left y-axis represent? total generation of municipal solid waste, in metric tons per year per capita generation of municipal solid waste, in kilograms per year per capita generation of municipal

If an equation of the linear function in the figure above is y=mx=b, than m=