Is f (x) = - 4x squared - 2x-8, concave up or down

X+y = 10 Y=-x+10 System of equations

Marshal compares water tanks at home improvment store. One tank holds 2.02 gallons ofof water a second tank holds 28.1 gallons of water how much more water does the second tank hold than the first tank

If u = 1 + i and v = 1 - i, what is u + v?

Expand the following question 3t (4t-1)

An old bone contains 80% of its original carbon-14. Use the half-life model to find the age of the bone

How do I solve 1/8x=5

Can u guys answer these last 4 questions for me w / work shown and also label the ones u guys did so I won't get them mixed up 1.) yx divided by 2 use x=7 and y=2 2.) m-n divided by 4 use m=5 and n=8 3.) x-y+6 Use x=6 and y=1 4.

The consecutive angles of a parallelogram are congruent A) Always. B) Sometimes. C) Never

A student solved the following problem. t+7 = - 8 on Wow t=-15 t=-9 Which of the following statements is true? The solution is correct. o.

If a start time is 7:15 a. m and an end time is 8:05 a. m, why do you not have to count the hours to find the elapsed time?