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Elina [12.6K]
2 years ago
6

Find the mean of the following numbers 7 21 2 17 3 13 7 4 9 7 9

Mathematics
1 answer:
Hitman42 [59]2 years ago
6 0

Answer:

9

Step-by-step explanation:

sum of the terms

mean=------------------------------

number of the terms

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Please help me quick!!
andrezito [222]

Answer:

B. (52,32)

Step-by-step explanation:

32 = 52 - 20

32 = 32

52 + 32 = 84

84 = 84

6 0
3 years ago
-3/16 7/4 -3/8 in order from least to greatest
jonny [76]

Answer:

-3/8,-3/16,7/4

4 0
3 years ago
Read 2 more answers
A number is chosen uniformly at random from among the positive integers less than $10^8$. Given that the sum of the digits of th
Reil [10]

Answer:

 

If the sum of the digits of a number is divisible by 9, then that number is divisible by 9. An..... sorry if this does not help :(

Step-by-step explanation:

3 0
2 years ago
If the squared difference of the zeroes of the quadratic polynomial x2+kx+30 is equal to 169 find the value of k and the zeroes
anyanavicka [17]

ANSWER

x  =  2 \: \: or \:  \:  x  =  15

Or

x  =   - 2 \: \: or \:  \:  x  =   -  15

EXPLANATION

The given polynomial is

f(x) = {x}^{2}  + kx + 30

where a=1,b=k, c=30

Let the zeroes of this polynomial be m and n.

Then the sum of roots is

m + n =  -  \frac{b}{a}  =  -k

and the product of roots is

mn =  \frac{c}{a}  = 30

The square difference of the zeroes is given by the expression.

( {m - n})^{2} =  {(m + n)}^{2} - 4mn

From the question, this difference is 169.

This implies that:

( { - k)}^{2}  - 4(30) = 169

{  k}^{2}  -120= 169

k^{2} = 289

k=  \pm \sqrt{289}

k=  \pm17

We substitute the values of k into the equation and solve for x.

f(x) = {x}^{2}   \pm17x + 30

f(x) = (x  \pm2)(x  \pm 15)

The zeroes are given by;

(x  \pm2)(x  \pm 15) = 0

x  =  \pm2 \: \: or \:  \:  x  =  \pm 15

5 0
3 years ago
HELPP!? (EASY MATH?!?) QUESTION BELOW (;<br><br><br> Second option correct?
Katarina [22]
Hey there !!

there rate of change represent slope

so here m = 0.5

y intercept = 3

so using this :- y = me+c

y = 0.5x + 3

option b is correct
3 0
3 years ago
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