(3d + 3 < or = -1) (5d + 2 > or = 12)
( 3d < or = -4) (5d > or = 10)
(d < or = -4/3) (d > or = 2)
Put a dark dot on -4/3 on the number line, and draw an arrow going left from that point. Put a dark dot on 2 on the number line, and draw an arrow going right from that point.
Answer:
(c) n(n+1)/√2
Step-by-step explanation:
√2+√8+√18+√32+...
1√2+2√2+3√2+4√2+...+n√2
- First term= √2
- Common difference= √2
- Sₙ= n/2(2√2+(n-1)√2)= n/2(n√2+√2)=n(n+1)√2/2= n(n+1)/√2
Option (c) is correct
D. the length is the same as the length of MN
17×2= 34
76-34= 40
2x=40
x= 20
Legth: 17
Width: 20
Answer:
Mean of boiling times = 26.9 seconds
Step-by-step explanation:
Times ella recorded are given as;
24.5 seconds, 23.2 seconds, 29.8 seconds, and 30.1 seconds.
Now, we want to find the mean of these boiling times.
Formula for mean is;
Mean = sum of terms/number of terms
In this question,
number of terms = 4
Sum of terms = 24.5 + 23.2 + 29.8 + 30.1 = 107.6
Thus,
Mean = 107.6/4
Mean = 26.9 seconds