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kotegsom [21]
3 years ago
12

Factor of −21x^2+2x+8

Mathematics
1 answer:
Vanyuwa [196]3 years ago
5 0

Answer:

-(7x + 4)(3x - 2)

Step-by-step explanation:

Hope this helps! have a nice day! Please consider making me Brainliest

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In a 3M Privacy Filters poll, 806 adults were asked to identify their favorite seat when they fly, and 492 of them chose a windo
Snowcat [4.5K]

Answer:

Step-by-step explanation:

If majority of adults prefer a window seat when they fly, it means that more than half or more than 0.5 of the population prefer a window seat when they fly.

We would set up the hypothesis test.

For the null hypothesis,

p = 0.45

For the alternative hypothesis,

p > 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

Sample proportion, P = x/n

Where

x = number of success = 492

n = number of samples = 806

P = 492/806 = 0.61

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

z = (0.61 - 0.5)/√(0.5 × 0.5)/806 = 6.24

From the normal distribution table, the p value < 0.00001

Since alpha, 0.01 < than the p value, then we would reject the null hypothesis. Therefore, at a 1% significance level, we can conclude that the majority of adults prefer a window seat when they fly.

8 0
3 years ago
How do you increase 300 by 54%?
Vanyuwa [196]
Multiply 300 by 54%= 16,200
Divide 16,200 by 100
= 162.20
Round 162.20 to the nearest whole
= 162
hope this helps.
This is the steps to finding a percent
4 0
3 years ago
Cindy is making a 21.5 inch necklace. There are beads every 3.25 inches along the necklace from the beginning of the necklace. W
DochEvi [55]

21.5 divided by 3.25

equals 6.615

round up to 6.62

7 0
3 years ago
Help ASAP help ASAP please help me ASAP
natita [175]

Answer:

f = 119

e = 61

d = 90

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Find the product or quotient for each. simple form<br> 5/9 divide 5/6
MakcuM [25]

Answer: 2/3

Step-by-step explanation:

5/9 and 5/6 doesn't have the same denominator. So 5/9 changes to 10/18, while 5/6 changes to 15/18.

10/18 divided by 15/18= 10/18 x 18/15 = 180/270

180/270= 2/3

8 0
3 years ago
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