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uranmaximum [27]
3 years ago
12

????? help pls ??????

Mathematics
1 answer:
Paladinen [302]3 years ago
7 0
I believe the answer is the last one!<span />
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20. Solve the equation x2 - 17x + 72 = 0.
Rina8888 [55]

Answer:

x=8,9

Step-by-step explanation:

x^2-17x+72=0

(x-8)(x-9)=0

x=8,9

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3 years ago
What is a 20% decrease followed by 40% increas
qaws [65]

i think its 112%

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3 years ago
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est
amid [387]

Answer:

(38.1,88.6)

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} = 38.3

Sample size, n = 695

Alpha, α = 0.05

Population standard deviation, σ = 3.6

95% Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

38.3 \pm 1.96(\frac{3.6}{\sqrt{695}} ) = 38.3 \pm 0.267 = (38.033,38.567) \approx (38.1,88.6)

8 0
3 years ago
Can someone help me with this?<br>1⁵ + 5² / 25⁰ - 5¹=​
salantis [7]

Answer:

the answer is 21.Here is how I know

3 0
3 years ago
Read 2 more answers
PLZZZ HELPPPP ILL MARK BRAINLIEST TO FIRST AND CORRECT ANSWER THAT HAS WORK AND A THX TO SECOND AND CORRECT ANSWER.
Verdich [7]

Answer: Your answer is A, <9 and <5

Step-by-step explanation:

YW AND PLS MARK ME A STHE NEW KING(THE BRAINIEST)

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2 years ago
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