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FromTheMoon [43]
4 years ago
5

(8 + 1) + 4 = 8+ (1+4)

Mathematics
1 answer:
Schach [20]4 years ago
4 0
It's 13=13. Add the numbers in the parenthesis first! So it would be 9+4=8+5, then just add them up and you get 13 on each side!
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A researcher is interested in the effects of exercise on mental health and he proposes the following study: Use stratified rando
Andre45 [30]

Answer:

Step-by-step explanation:

(a) The type of study described in the question is referred to as an experimental study.

(b) The treatment group is the group that exercises 2 times a week, whereas the control group is the group that does not exercise.

(c) Yes, the study under consideration makes use of blocking.

The blocking variables are 18-30-year-olds, 31-40-year-olds, and 41-55year olds.

(d) No, the study under consideration did not make use of blinding because the patients know if they are in the group that exercises or the one that doesn’t.

6 0
4 years ago
Inflation Rate Suppose the annual rate of inflation averages 2% over the next 10 years. With this rate of inflation, the approxi
alexandr1967 [171]

Answer:

After 10 years the cost will be $ 97.52.

Step-by-step explanation:

This problem requires us to calculate the cost of graphing after 10 years if inflation rate is two percent. This can easily be calculated by compounding present value of current cost at the rate of 2%. Detail calculation is given below.

FV= 80 (1+2%)^10

FV = $ 97.52

3 0
3 years ago
HELP MEE ITS FOR MATH ABD NOBODY HAD SAID WHAT TBE STORE MADE FROM HIS SALES
svet-max [94.6K]

Answer:

727.5

Step-by-step explanation:

If Jarrod made 3 percent in commissions then y have to find what 97 percent of 750 is

The equation set up would be .97 times 750

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7 0
3 years ago
In physics, pressure is the amount of force exerted on a surface per unit area, P=F/A .The pressure, in atmospheres (atms), of a
xz_007 [3.2K]

Answer:

{r|r>0}

Step-by-step explanation:

Pressure is the amount of force exerted on a surface per unit area, P=F/A.

The pressure, in atmospheres (atms), of a liquid on the circular base of a bucket is represented by the composite function PoA(r), where P(A) =  375 / A and A (r) = pi r²

We know that the domain is the set of input values.

Pressure, P=\dfrac{F}{\pi r^2}

At r = 0, it becomes not defined.

It means that r can be any value that is greater than 0. Hence, the correct option is (c). i.e. {r|r>0}

3 0
4 years ago
Solve 3(2y+4z) in Distributive Property
Rus_ich [418]

Answer:

6y+12z

Step-by-step explanation:

Multiply 3 with the numbers inside the parenthesis

3 x 2  and 3 x 4

6    and 12

7 0
4 years ago
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