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Nina [5.8K]
3 years ago
13

58:11

Mathematics
1 answer:
navik [9.2K]3 years ago
7 0

Answer:

not sure of the answer cause

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Please show step by step<br><br> a)6 ÷2(1+2)<br> b)48 ÷2(9+3)<br> c)9-3 ÷⅓ +1
UNO [17]

Answer:

1

Step-by-step explanation:

a)2 times 1 and then times 2 become (2+4) then 6 ÷ 6 (because 2 plus 4)

7 0
3 years ago
The atmospheric pressure at sea level is 14.7 lb/in2. This pressure is reduced by half for each 3.6 miles above sea level. Which
Nina [5.8K]
It could be a linear graph with a negative slope 
x axis  is height above ground and y axis id air pressure
so there willbe a point  at (0,14.7) on y axis representing the pressure at sea level. There will be another point at (3.6, 7.35) where  air pressure is half that at ground level. The straight line will continue until it reaches the x axis  ad (0, 7.2)  where there is no air pressure.
4 0
3 years ago
Read 2 more answers
An independent-measures research study was used to compare two treatment conditions with n= 12 participants in each treatment. T
Maurinko [17]

Answer:

(a) The data indicate a significant difference between the two treatments.

(b) The data do not indicate a significant difference between the two treatments.

(c) The data indicate a significant difference between the two treatments.

Step-by-step explanation:

Null hypothesis: There is no difference between the two treatments.

Alternate hypothesis: There is a significant difference between the two treatments.

Data given:

M1 = 55

M2 = 52

s1^2 = 8

s2^2 = 4

n1 = 12

n2 = 12

Pooled variance = [(n1-1)s1^2 + (n2-1)s2^2] ÷ (n1+n2-2) = [(12-1)8 + (12-1)4] ÷ (12+12-2) = 132 ÷ 22 = 6

Test statistic (t) = (M1 - M2) ÷ sqrt [pooled variance (1/n1 + 1/n2)] = (55 - 52) ÷ sqrt[6(1/6 + 1/6)] = 3 ÷ 1.414 = 2.122

Degree of freedom = n1+n2-2 = 12+12-2 = 22

(a) For a two-tailed test with a 0.05 (5%) significance level and 23 degrees of freedom, the critical values are -2.069 and 2.069.

Conclusion:

Reject the null hypothesis because the test statistic 2.122 falls outside the region bounded by the critical values.

(b) For a two-tailed test with a 0.01 (1%) significance level and 23 degrees of freedom, the critical values are -2.807 and 2.807.

Conclusion:

Fail to reject the null hypothesis because the test statistic 2.122 falls within the region bounded by the critical values.

(c) For a one-tailed test with 0.05 (5%) significance level and 23 degrees of freedom, the critical value is 1.714.

Conclusion:

Reject the null hypothesis because the test statistic 2.122 is greater than the critical value 1.714.

6 0
3 years ago
Which equation has the greatest product? A 5x 6 B 7x 3 C 9x 3 D 3x 8
borishaifa [10]

Answer:

A: 5x6

Step-by-step explanation:

5x6=30

7x3=21

9x3=27

3x8=24

3 0
3 years ago
Which describes the steps that can be used to solve this problem?
ludmilkaskok [199]
It's b. You have to times $4 by 6 to get $24. Then you take it away from $30 to get the change so $6
3 0
3 years ago
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