What is the answer to this

4x+7y+-80; 3x+5y=-58

What is the height of a hemisphere if it has a radius of 0.8m (80cm) ?

Write two fractions, both not positive, whose product is 5/8

Jeremy has to chose his classes for next year. there is a 95% chance he will take english and an 80% chance he will take both english and astronomy. what is the probability that he takes astronomy given he takes english?

What is 1,424,000,000 in scientific notation

The ratio of Geoff's to Ethan's age is 1:10. If the total of their ages is 88, how old is Ethan

Which type of correlation would you expect to see between the weight of a dog and the amount of food the dog eats? Positive Negative None

The sum of 3 times a number and 6=2 variable b

Find the value of x2 - 7x + 9 when x = 6. The value of the expression when x = 6 is

What is the degree of 7x^7+10x^4+4x^3-5x^11-10x^6-6x^7?

Round 46.895 to the nearest tenth