Write and evaluate expression for 21+18+16+18 in addition then in addition and multiplication

If x+y=-10 and x-y=2, what is the value of x?

Is this a function or not a function (1, 3) (2, 5) (3, - 4) (4, - 3) (5, - 1)

A number tripled and tripled again is 702. What is the number?

The square of mark's age 3 years ago is 6 times the age he will be in 9 years. what is his age now? 9 12 15

When factoring, what is the first thing you need to do?

The angle of Inclination from the base of skyscraper A to the top of skyscraper B is approximately 11.9°. If Skyscraper B is 1424 feet tall, how far apart are the two skyscrapers? Assume the bases of the two buildings are at the same elevation. feet.

Quadratic equation whose roots are 6 and 4, and whose leading coefficient is 5.

How many numbers less than 1000 are divisible by 7?

What shape has 4 equal sides. and sometimes has 4 right angles

Together, selina and pam have 132 stamps. selina's collection has 34 more stamps than pams collection how many stamps does pam have