Communicative Property: (5+7) +3
Associative prop: (3+5) +7 or (3+7) +5
And the last one, I don’t fully understand what it is asking, but I believe it is asking for the answer which would be 15
Answer: D, an equilateral triangle has three congruent sides.
Answer:

Step-by-step explanation:
we have

Solve for x
Multiply by 6 both sides to remove the fractions

Combine like terms




Answer:
Miguel start to swim when Ario has traveled 4.4 m.
Step-by-step explanation:
The total lenght of the pool is 25.
Since both of them standing 3 m from one side of the pool, then, the total distance both need to cover is
m= 22 m.
Assume that the distance traveled by Ario before Miguel start to swin is
. That means, the remaining distance to Ario (to cover the total size of the pool) is
.
Then, in acoordance to the problem, the ratio between these two distances must be equal to 1/4.
That is,
.
So, we need to obtain
from this equation. We must note that
, otherwise we have a zero in the denominator.
So, we rearrange the equation,
(Multiplying both sides of equation by (
).
Then,
.
Therefore,
m.
Answer:
Vertically angles
Step-by-step explanation: