The ratio of Maths and science books in a school library is 4:5. If the number of science books is 75, find the number of Maths books? Pls help me​

An equation where variables are used to represent known values—function notation true or false

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

The square root of 9x plus 7 plus the square rot of 2x equall to 7