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3 years ago

What is the factorization of x2+ 10x+21

Mathematics

1 answer:

Marta_Voda [28]3 years ago

7 0

Answer:

(x+7) (x+3)

Step-by-step explanation:

x times x equals x2

3x + 7x = 10x

7 x 3 = 21

(x+7) (x+3)

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Kipish [7]

Answer:

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Step-by-step explanation:

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3 years ago

The sum of two numbers is 20.8 and their difference os 10.2. Find these numbers.

Slav-nsk [51]

Answer:

the numbers are 10.6 and 10.2

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3 years ago

What is the average group numbers for 85,92,84,85,96,95

laiz [17]

To find the average, add all numbers together and divide by the amount of numbers there are

(85 + 92 + 84 + 85 + 96 + 95)/6 = 537/6 = 89.5

you're answer is 89.5 as average

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3 years ago

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Answer:

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3 years ago

One of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average

Nonamiya [84]

Answer:

0.0930

Step-by-step explanation:

Given that one of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average, 6 days.

she tests a one-sided alternative about the population mean cold duration when drinking coffee, H0: μcoffee = 6 Ha: μcoffee < 6 She finds z = −1.68 with one-sided P-value P = 0.0465.

If hypotheses changed to two tailed as:

$H_0: \mu_{coffee} = \mu_{tea}\\H_a: \mu_{coffee}\neq \mu_{tea}$

(Two tailed test)

Since we have mean difference and std error the same, test statistic would remain the same.

p value for two tailed would be = twice the p value for one tail

= $2(0.0465)\\= 0.0930$

6 0

3 years ago