How do I solve this twice the difference of a number and seven is less than or equal to forty

Factor: x^2 - 81

Without dividing or listing multiples how can u tell if 61 is a multiple of 6

What is the value of the digit 6 in the number 106,534

What is a graph that has a slope of-2

Perimeter and area of a rectangle 11 cm by 19.3cm

How do you work out 12r-8-12=

Daeshon is in the math club. there are 21 students in the club. the math teacher will pick 2 students at random to guide visiting students from colorado. what is the probability that daeshon will not be picked as a guide?

Chris is behind in 9 classes of school he has a total time of 25 days to make up 75 hours and 4 minutes worth of late work how many hours does Chris need to do each day in each class to be able to complete the deadline make you brianilist

True or false a function is a preset formula that performs a calculation?

The sum of tow negative numbers will be what kind of number