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Dovator [93]
3 years ago
8

Philip is saving money to buy a new computer. He saves the same amount of money each

Mathematics
1 answer:
Alenkasestr [34]3 years ago
4 0

Answer: 1020

Step-by-step explanation:

300 + 200 = 500 + 520 = 1020

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three couples go to the movies and sit together in a row of six seats. In how many ways can they arrange themselves if each coup
vagabundo [1.1K]

Answer:

6

Step-by-step explanation:

im just gonna name these couples by numbers 1 , 2 and 3 and each couple will take up 2 seats together.

1 2 3

3 2 1

2 3 1

1 3 2

2 1 3

3 1 2

7 0
3 years ago
Read 2 more answers
A study is performed in a large southern town to determine whether the average amount spent on food per four-person family in th
hoa [83]

Step-by-step explanation:

H0: u = 150

H1: u ≠ 150

Total sum = 15933.24

N = 100

Mean = 15933.24/100

= 159.3324

σ² = 25954.03 - (159.3324)²/100

σ² = 556.213

σ = √556.213

σ = 23.8162

Testing hypothesis

t = (bar x - u)/ σ/√n

= 159.3324-150/23.8162/√100

= 3.91

We will have a p value of 0.02

0.0002 < 0.01

We reject null hypothesis at 1% level of significance

C. Mean = 159.3324

Se= 2.3936

Df = 100-1 = 99

Critical value at 0.01 = +-2.626

T = x-u/s.e

= -2.626 =( x -150)/2.3936

When we cross multiply and solve this

X = 143.714 for the lower tail

2.626 = (x-159)/2.3936

= 156.286 for upper tail.

We therefore reject H0 at

Bar X <= 143.71

Bar X >= 156.286

At 10%

Critical t = 1.660

-1.660 = (x - 150)/2.3936

Solving this ,

X =146.02 at the lower tail

1.660 = (x-150)/2.3936

X = 153.97

We reject H0 at

X<= 146.03

X>=153.97

4 0
3 years ago
Is -4x binomial trinomial or monomial
kenny6666 [7]
The answer to your question is Monomial (:
8 0
3 years ago
What is 2+2? i seriously dont know ;)
Cerrena [4.2K]

Answer:

uhhhhhhhhh i think its 8   yep its 8

Step-by-step explanation:

3 0
3 years ago
4(x+1)+x=5(x-1)+9 is there a solution
grigory [225]

Answer:

Kind of ... any value of x is a solution, but there isn't any unique solution.

Step-by-step explanation:

4(x+1)+x=5(x-1)+9

4x + 4 + x = 5x - 5 + 9

5x + 4  =  5x + 4

4 0
3 years ago
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