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erastovalidia [21]
3 years ago
12

"Five times the difference of twice a number and three,

Mathematics
1 answer:
Gala2k [10]3 years ago
7 0

Answer:

4

Step-by-step explanation:

5(2x-3)-(x+8) = 13

10x-15-x-8 = 13

9x = 36

x = 4

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In a random sample of n1 = 162 males, there are x1 = 63 people that have blue eyes. In a random sample of n2 = 333 females, ther
sesenic [268]

Answer:

z = 2.1784 > 1.96,

Reject the null hypothesis

Step-by-step explanation:

For the males:

n1  = 162, x1 = 63

P1 = x 1/ n1 = 0.3889

For the Females:

n2 = 333,

x2 = 97

P 2 = x2/n2

= 0.2913

P 1= P2 Null hypothesis

P 1 is not equal to P 2 alternative hypothesis

Pooled proportion:

P= (x1 + x2) /( n1+ n2)

= (63 + 97) / (162 + 333)= 0.3232

Test statistics :

Z= (p1 - p2) /√p(1-p)× (1/n1 + 1/n2)

0.3889- 0.2913 / √0.3232 × 0.6768 × (1/162 +1/333)

=2.1784

c) Critical value :

Two tailed critical value, z critical = Norm.S .INV (0.05/2) = 1.960

Reject H o if z < -1.96 or if z > 1.96

d) Decision:

z = 2.1784 > 1.96,

Reject the null hypothesis

7 0
3 years ago
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Nuetrik [128]
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5 0
2 years ago
I’ve been trying to figure out this question on my homework and I’ve been confused for days now.
dsp73

Answer:

18m^12n^3

Hope this helps!!

Step-by-step explanation:

4 0
2 years ago
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Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1.
Sedbober [7]

Answer:

B)Y=3

Step-by-step explanation:


7 0
3 years ago
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Does (-24,-12) and (-15,-9) line pass through point (18,2)?
Dmitrij [34]

Find the slope using the formula [ y2-y1/x2-x1 ].

-9-(-12)/-15-(-24)

3/9

1/3

Find the y-intercept using the formula [ y = mx + b ].

y = 1/3x + b

-12 = 1/3(-24) + b

-12 = -8 + b

-4 = b

Use (18, 2) to see if the line passes through it

y = 1/3x - 4

2 = 1/3(18) - 4

2 = 6 - 4

2 = 2 TRUE

Thus, the line does pass through (18, 2).

Best of Luck!

4 0
2 years ago
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