How to solve (a-3)4

Mathematics

2 answers:

inessss [21]2 years ago

7 0

Answer:

4a - 12

Step-by-step explanation:

1. (a + −3) (4)

2. (a) (4) + (−3) (4)

4a − 12

Aloiza [94]2 years ago

5 0

Answer: a

−

Step-by-step explanation:

Multiply everything by 3 to cancel out the division by 3 on the left, and that should leave you with

⋅

−

(Dividing and multiplying are opposites, like adding and subtracting or integrating and differentiating. One does something, the other undoes it. If you want to get rid of a multiplication, divide it. If you want to get rid of an integration, differentiate it.)

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The number of ducks and pigs in a field totals 38. The total number of legs among them is 94 assuming each duck has exactly two

Reika [66]

Answer:

22 pigs and 3 ducks

Step-by-step explanation:

22 pigs would make 88 legs and 3 ducks will make 6 legs so u add that together and you get 94 legs (smile) ik i'm smart lol

8 0

3 years ago

Determine the margin of error, m , of a 99% confidence interval for the mean IQ score of all students with the disorder. Assume

madreJ [45]

Answer:

E= 6.45

standard deviation is σ = 15,

The critical value is z(α/2) = 2.58.

Step-by-step explanation:

Margin error is the value that is lie above and below the sample.It gives percentage of numbers.Its is the product of critical value standard deviation and standard error of statistic.

General formula for the margin of error is

Margin of error = critical value × standard error of statistic

= $z \alpha /2$ × σ √n