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Helga [31]
3 years ago
9

Please help me please i really neeed help

Mathematics
2 answers:
mamaluj [8]3 years ago
5 0

Answer:

positive

negative

positive

Step-by-step explanation:

-7-8+22

-15+22

+7

Hence, positive sign is correct.

6-4+(-5)

6-4-5

6-9

-3

Hence, negative sign is correct.

-3+(-8)+12

-3-8+12

-11+12

+1

Hence, positive sign is correct .

777dan777 [17]3 years ago
4 0

Answer:

A: positive B: Negative C: Positive

Step-by-step explanation:

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Which equation has the same solution as 10x-x+5=4110 x − x + 5 = 41?
Tatiana [17]
D or the last dot how ever you wanna describe it
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3 years ago
To test the belief that sons are taller than their​ fathers, a student randomly selects 13 fathers who have adult male children.
KATRIN_1 [288]

Answer:

1) B. The differences are normally distributed or the sample size is large

C. The  sample size mus be large

E. The sampling method results in an independent sample

2) The null hypothesis H₀:  \bar x_1 =  \bar x_2

The alternative hypothesis Hₐ: \bar x_1 <  \bar x_2

Test statistic, t = -0.00693

p- value = 0.498

Do not reject Upper H₀ because, the P-value is greater than the level of significance. There is sufficient evidence to conclude that sons are the same height as their fathers  at 0.10 level of significance

Step-by-step explanation:

1) B. The differences are normally distributed or the sample size is large

C. The  sample size mus be large

E. The sampling method results in an independent sample

2) The null hypothesis H₀:  \bar x_1 =  \bar x_2

The alternative hypothesis Hₐ: \bar x_1 <  \bar x_2

The test statistic for t test is;

t=\dfrac{(\bar{x}_1-\bar{x}_2)}{\sqrt{\dfrac{s_{1}^{2} }{n_{1}}-\dfrac{s _{2}^{2}}{n_{2}}}}

The mean

Height of Father, h₁,  Height of Son h₂

72.4,      77.5

70.6,      74.1

73.1,       75.6

69.9,      71.7

69.4,      70.5

69.4,      69.9

68.1,       68.2

68.9,      68.2

70.5,       69.3

69.4,       67.7

69.5,       67

67.2,       63.7

70.4,       65.5

\bar x_1  = 69.6      

s₁ = 1.58

\bar x_2 = 69.9

s₂ = 3.97

n₁ = 13

n₂ = 13

t=\dfrac{(69.908-69.915)}{\sqrt{\dfrac{3.97^{2}}{13}-\dfrac{1.58^{2} }{13}}}

(We reversed the values in the square root of the denominator therefore, the sign reversal)

t = -0.00693

p- value = 0.498 by graphing calculator function

P-value > α Therefore, we do not reject the null hypothesis

Do not reject Upper H₀ because, the P-value is greater than the level of significance. There is sufficient evidence to conclude that sons are the same height as their fathers  at 0.10 lvel of significance

8 0
3 years ago
The Kitchen committee purchased 76 boxes of cookies for Vacation Bible School,
iren2701 [21]
269 I think :) not sure
5 0
2 years ago
I will give out brainliest noooooo spams ok
alekssr [168]

Answer:

0.077

Step-by-step explanation:

Marco can divide 77 by 1000 to convert it to dekagrams

There are 0.077 decagrams per 77 centagrams

5 0
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Which equation is equivalent to the equation 5X+30=45?
nika2105 [10]

Answer:

its probably 45-30=5x

6 0
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