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scoray [572]
3 years ago
14

Evaluate the expression x2 • x1 for x = 9

Mathematics
2 answers:
Mumz [18]3 years ago
8 0

Answer: 162

Step-by-step explanation: 9(2) • 9(1)

18 • 9

162

miskamm [114]3 years ago
5 0

Answer:

162

Step-by-step explanation:

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A square has a perimeter of 39.6 millimeters. What is the length of each side?​
garri49 [273]

Answer:

9.9 millimeters

Step-by-step explanation:

To find the perimeter of a square,

Equation: 4 • length = P

So in this case, we're just working backwards. To find the length, divide.

39.6/4 = 9.9

3 0
2 years ago
Read 2 more answers
228,227 what are the place value of all these numbers
lys-0071 [83]

Answer:

hundred thousand, ten thousand, thousand, hundreds, tens, and ones

Step-by-step explanation:

6 0
3 years ago
What are the first 5 terms of the sequence where a=1 a, a2=2 and an=1/2(a n-1•a n-2)
Sliva [168]

Answer:

\large\boxed{a.\ 1,\ 2,\ 1,\ 1,\ \dfrac{1}{2}}

Step-by-step explanation:

We have the recursive formula of a sequence:

\left\{\begin{array}{ccc}a_1=1\\a_2=2\\a_n=\dfrac{1}{2}(a_{n-1}\cdot a_{n-2})\end{array}\right\\\\\text{thereofre}\\\\a_3=\dfrac{1}{2}(a_2\cdot a_1)=\dfrac{1}{2}(2\cdot1)=\dfrac{1}{2}(2)=1\\\\a_4=\dfrac{1}{2}(a_3\cdot a_2)=\dfrac{1}{2}(1\cdot2)=\dfrac{1}{2}(2)=1\\\\a_5=\dfrac{1}{2}(a_4\cdot a_3)=\dfrac{1}{2}(1\cdot1)=\dfrac{1}{2}(1)=\dfrac{1}{2}

7 0
3 years ago
Your class rank in 2018 was 89 out of 360 students. In 2019 your class rank was 95 out of 450 students. a. In which year did you
spin [16.1K]

A) given that in 2019 you were among the 21.11% of the best students in the class, in that year you had the higher percentile ranking, and B) the measure of average that would be the most meaningful is the median.

Given that your class rank in 2018 was 89 out of 360 students, while in 2019 your class rank was 95 out of 450 students, to determine A) in which year did you have the higher percentile ranking, and B) if you had the data on the cumulative GPA of each student at the end of the spring semester in 2018, which measure of average would be the most meaningful - mean, median or mode -, the following calculation should be performed:

  • 360 = 100
  • 89 = X
  • 89 x 100/360 = X
  • 24.72 = X
  • 450 = 100
  • 95 = X
  • 95 x 100/450 = X
  • 21.11 = X

Therefore, A) given that in 2019 you were among the 21.11% of the best students in the class, in that year you had the higher percentile ranking, and B) the measure of average that would be the most meaningful is the median.

Learn more about maths in brainly.com/question/25748895

8 0
2 years ago
Cheyenne ran a 6.36-kilometer race in 53 minutes. What was her speed in kilometers per hour?
svlad2 [7]

Answer:

7.23km/h

Step-by-step explanation:

Speed = distance/time

Given

distance = 6.36km and

Time = 53minutes

Convert 53minutes to hour.

60 minutes = 1 hour

53 minutes = x hour

Cross multiply

X hour x 60 = 53

Xhour = 53/60

X = 0.88 hour

Therefore

Speed = 6.36km /0.88hr

= 7.23km/h

5 0
3 years ago
Read 2 more answers
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