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svet-max [94.6K]
3 years ago
8

b) x 2 + x -2 Find the zeroes of the quadratic polynomial and verify the relationship between the zeroes and the coefficients;

Mathematics
1 answer:
natulia [17]2 years ago
3 0
Well ...I don't understand that but here's something that would help me calm down

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The numbers 55 and 55.
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Read 2 more answers
You want to test the claim that the average age of students at Gorka College is greater than the average age of students at Yapo
777dan777 [17]

Answer:

Kindly check explanation

Step-by-step explanation:

The hypothesis :

H0 : μ1 = μ2

H1 : μ1 > μ2

Given :

x1 = 21.1 ; n1 = 53 ; s1 = 1.1

x2 = 20.7 ; n2 = 46 ; s2 = 1.2

The test statistic :

(x1 - x2) / √[(s1²/n1 + s2²/n2)]

(21.1 - 20.7) / √[(1.1²/53 + 1.2²/46)]

0.4 / 0.2326682

Test statistic = 1.719

The degree of freedom using the conservative method :

Comparing :

Degree of freedom = n - 1

Degree of freedom 1 = 53 - 1 = 52

Degree of freedom 2 = 46 - 1 = 45

Smaller degree of freedom is chosen ;

The Pvalue from Test statistic, using df = 45

Pvalue = 0.0462

Pvalue < α ; Hence, there is significant evidence to conclude that average age of Gorka student is higher than Yaphoa.

7 0
3 years ago
Factorise X2 + 5x - 66?
masha68 [24]

Step-by-step explanation:

Two factors that have a sum of 5 and a product of -66: 11 and -6.

x² + 5x - 66

= (x + 11)(x - 6).

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What is 1 and 2 10ths written as a decimal?
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1 is the whole number which means it goes before the decimal point. 2/10 is the fractional piece making it go after the decimal point in the tenths place.

1 2/10 = 1.2
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