This is an example to show you what it means to be closed:
If you multiply two real numbers, you will get another real number. Since this process is always true, it is said that the real numbers are "closed under the operation of multiplication.
I truly hope this helps!!
Answer:
<h3>Add 47.6 and 39.75, then round the answer</h3>
Step-by-step explanation:
If Ramina found the length of two pieces of ribbon to be 47.6 inches and 39.75 inches, the effective strategy of finding the sum of the two lengths is to:
1) First is to add the two values together
47.6 + 39.75
= (47+0.6)+(39+0.75)
= (47+39)+(0.6+0.75)
= 86 + 1.35
= 87.35
2) Round up the answer to nearest whole number.
87.35 ≈ 87 (note that we couldn't round up to 88 because the values after the decimal point wasn't up to 5)
Option C is correct
Step-by-step explanation:
g(t) = (t + 1)² − 20.25
0 = (t + 1)² − 20.25
20.25 = (t + 1)²
±4.5 = t + 1
t = -1 ± 4.5
t = -5.5 or 3.5
The zeros are (-5.5, 0) and (3.5, 0).
Riley : 0.48/12 = 0.04 per bead
Magdalena : 1.00/20 = 0.05 per bead
15 beads...
Riley : 15 x 0.04 = 0.60
Magdalena : 15 x 0.05 = 0.75
15 of Riley's beads cost (0.75 - 0.60) = 0.15 cents less then 15 of Magdalena's beads