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RUDIKE [14]
2 years ago
6

-3(n+3) - 10(8n + 9)

Mathematics
2 answers:
riadik2000 [5.3K]2 years ago
5 0

Answer:

-83n-99

Step-by-step explanation:

first you need to distribute through

-3n-9-80n-90

then you combine like terms

-83n-99

crimeas [40]2 years ago
3 0

Answer:

-83n -99

Step-by-step explanation:

Do -3(n+3)-10(8n+9) which is -3n-9 ; -80n-90, and then combine like terms.

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8 0
1 year ago
25% of all who enters a race do not complete. 30 haveentered.
nikklg [1K]

Answer:

The probability that exactly 5 are unable to complete the  race is 0.1047

Step-by-step explanation:

We are given that 25% of all who enters a race do not complete.

30 have entered.

what is the probability that exactly 5 are unable to complete the  race?

So, We will use binomial

Formula : P(X=r) =^nC_r p^r q^{n-r}

p is the probability of success i.e. 25% = 0.25

q is the probability of failure =  1- p  = 1-0.25 = 0.75

We are supposed to find the probability that exactly 5 are unable to complete the  race

n = 30

r = 5

P(X=5) =^{30}C_5 (0.25)^5 (0.75)^{30-5}

P(X=5) =\frac{30!}{5!(30-5)!} \times(0.25)^5 (0.75)^{30-5}

P(X=5) =0.1047

Hence the probability that exactly 5 are unable to complete the  race is 0.1047

6 0
3 years ago
John had $21 to spend on 2 notebooks. After buying them he had $13. How much did each notebook cost?
Eva8 [605]

john had 21.00After buying 2 notebooks he had 13.00

21-13= 8 / 2 =4 each notebook cost 4 dollars.

5 0
3 years ago
The length of a rectangle solid is 3.0 m the width is 0.6 meter, and the height is 0.4 meter. Find, to the nearest tenth, the nu
Ad libitum [116K]

Answer:

0.72\,\,m^3

Step-by-step explanation:

Given:

Length of a rectangle solid = 3 m

Width of a rectangle solid = 0.6 m

Height of a rectangle solid = 0.4 m

To find: Volume of the solid

Solution:

Volume of the solid = length × breadth × height

=3\times 0.6\times 0.4=0.72\,\,m^3

So, the number of cubic meters in the volume of the solid is 0.72\,\,m^3

3 0
3 years ago
Can you please help me figure out 6m=<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B-1%7D%7B3%7D%20" id="TexFormula1" title=" \f
Rainbow [258]
-1/3 divided by six... m=-1/18
8 0
3 years ago
Read 2 more answers
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