Answer:
4 hours and 7 hours
Step-by-step explanation:
Marcus = x hours
Donnell = x + 3 hours
Total = 11 hours
- x + x + 3 = 11
- 2x + 3 = 11
- 2x = 8
- x = 4
So Marcus practiced 4 hours and Donnell practiced 7 hours
Answer:
A = 22 yd² ( 22 square yards )
Step-by-step explanation:
Im assuming those are the sides of the triangle. Next time, probably post the picture with the pieces in place.
Area for triangle is Base•Height/2
If 4 is the height and 11 is the base, you multiply then together like so.
4 • 11 = 44
then divide in half
44 / 2 = 22
Answer:
10
Step-by-step explanation:
If W is the present age of the woman and D is the present age of the daughter, then:
W = 4D
W + 5 = 3(D + 5)
Substituting the first equation into the second:
4D + 5 = 3(D + 5)
4D + 5 = 3D + 15
D = 10
The daughter is 10 years old.
Answer:
(5 -b)^4 = b^4 -20b^3 +150b^2 -500b +625
Step-by-step explanation:
The applicable rules of exponents are ...
√a = a^(1/2)
(a^b)^c = a^(bc)
__
You have √((5-b)^8) = ((5 -b)^8)^(1/2)
= (5 -b)^(8/2) = (5 -b)^4
Sometimes, "simplify" means "remove parentheses".
(5 -b)^4 = b^4 -20b^3 +150b^2 -500b +625
