Answer:
Step-by-step explanation:
5+19×2
Multiplication come first before addition
= 5 + 18
= 23
Answer:
When number of bricks is multiplied by 2, the length is multiplied by
B) 2
Step-by-step explanation:
Number of bricks is two times the length of the wall
i.e. Number of bricks= 2×Length of the wall
When the number of bricks is multiplied by 2, the length is also multiplied by 2
since, when number of bricks=6 then, length of wall=3
and when number of bricks=2×6=12 then, length of wall=2×3=6
Hence, when number of bricks is multiplied by 2, the length is multiplied by
B) 2
Answer:
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Step-by-step explanation:
Answer:
9 1/3
Step-by-step explanation:
Given:
Ten People
5 people = 30 years old
3 people = 32 years old
1 person = 31 years old
1 person = 65 years old
We need to arrange the ages in order from least to greatest.
30, 30, 30, 30, 30, 31, 32, 32, 32, 65
65 is the outlier.
A.) mean age without the outlier. count of the numbers : 9
5 x 30 = 150
1 x 31 = 31
3 x 32 =<u> 96</u>
total age 277
÷ # of pax<u> 9</u>
mean 30.77 round to the nearest tenth 30.80
b.) Standard deviation:
We need to calculate variance first:
5 pax : 30 - 30.80 = - 0.80 ⇒ -0.80² = 0.64 * 5pax = 3.20
1 pax : 31 - 30.80 = 0.20 ⇒ 0.20² = 0.04 * 1pax = 0.04
3 pax : 32 - 30.80 = 1.20 ⇒ 1.20² = 1.44 * 3 pax = 4.32
Variance : (3.20 + 0.04 + 4.32) / 9 pax = 7.56 / 9 = 0.84
Standard deviation is simply the square root of the variance.
Standard deviation = √0.84 = 0.916
0.916 round to nearest hundredths is 0.92
0.916 round to nearest tenths is 0.90
