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icang [17]
3 years ago
7

Solve using the quadratic formula.

Mathematics
1 answer:
Ivanshal [37]3 years ago
7 0

the answer is z=0, 1 over 3

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The mean number of words per minute (WPM) typed by a speed typist is 149 with a standard deviation of 14 WPM. What is the probab
Troyanec [42]

Answer:

78.81%

Step-by-step explanation:

We are given;

Population mean; μ = 149

Sample mean; x¯ = 147.8

Sample size; n = 88

standard deviation; σ = 14

Z-score is;

z = (x¯ - μ)/(σ/√n)

Plugging in the relevant values;

z = (147.8 - 149)/(14/√88)

z = -0.804

From z-distribution table attached, we have; p = 0.21186

P(X > 147.8) = 1 - 0.21186 = 0.78814

In percentage gives; p = 78.81%

6 0
2 years ago
What is the graph of the equation y-1=2/3(x-2)
Montano1993 [528]

Answer:

Step-by-step explanation:

Just download Photomath

4 0
3 years ago
A sequence is defined by the recursive function f(n + 1) = one-halff(n). If f(3) = 9 , what is f(1) ?
almond37 [142]

Answer:

d.) 81

Step-by-step explanation:

f(2) would be 27 and 27x3 is 81.

81/3=27

27/3=9

9 0
3 years ago
Read 2 more answers
Yo make lemonade you have to mix 2 quarts is water with 8 tablespoons is lemonade mix. How much mix will you need for 12 quarts
Alisiya [41]
2 quarts- 8 tablespoons
12 quarts- 8 x 6 = 48 tablespoons
6 0
3 years ago
Select all equations that have the same solution as 3x - 12=24
Evgen [1.6K]

Answer:

4

Step-by-step explanation:

3x-12=24

-12 to both sides

3x-12-12=24-12

3x=12

3x/3=12/3x

x=4

7 0
3 years ago
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