Answer:
Step-by-step explanation:
Yes. The commutative property of addition (as well as the commutative property of multiplication) applies to all real numbers, and even to complex numbers. As an example (for integers):
5 + (-3) = (-3) + 5
14. 6.4 blocks
15. 1.78
16. 7.47
A- price of adult's ticket
c- price of children's ticket
a+3c=20
a=c+2
c=a-2
a+3(a-2)=20
a+3a-6=20
4a=26
a=6.5
The cost of an adult's ticket is $6.50
I think the problem is this: 8, 4, 2. 1, 1/2 , 1/4
Each term in the sequence is 1/2 of the previous term.
The next term is 1/2 * 1/4 = 1/8.
Answer:
sometimes, if their average angle is over 45 degrees
never are 2 obtuse angles summing to 180 degrees
always. two 90 degree angles always sum to 180 which is a straight line
