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Pavel [41]
3 years ago
15

The difference between a country's exports and imports is called the country's trade balance. If one country had a trade balance

of - $86 billion in 1991, $142 billion in
1995, and - $43 billion in 1994. What was the total trade balance for these years?
A. -271 billion dollars
OB. 271 billion dollars
O C. 13 billion dollars
O D . -13 billion dollars
Mathematics
1 answer:
liq [111]3 years ago
8 0

Answer:

C: 13 billion dollars

Step-by-step explanation:

- 86 + 142 - 43 = 13 billion dollars

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Researchers wanted to determine if there was an association between the level of satisfaction of an individual and their risk of
castortr0y [4]

Answer:

Step-by-step explanation:

Hello!

To see if there is an association between the variables:

"Level of satisfaction of an individual"

"Risk of diabetes of an individual"

The researchers studied 1621 people over 5 years.

Observations recorded:

Interviews of daily lives and hassles and hypothetical situations that were studied to assess their emotions.

Determination, if in the course of these 5 years the individuals experienced any type of diabetes.

Conclusion "Satisfied individuals are less likely to have diabetes"

a) This is a prospective cohort study.

In this type of study, a group of individuals that share the same characteristics is observed over some time, recording the events of interest.

b) Considering that the experiment concluded that "satisfaction" reduces the "risk of diabetes", we can determine that the response variable is "Risk of diabetes of an individual" and the explanatory variable is "Level of satisfaction of an individual".

Remember, the explanatory variable is the one considered to have a direct effect over the response variable.

c) "the research team also hasn't ruled out that a common factor like genetics could be causing both the emotions and the lung cancer."

There is a new variable that may affect the experiment. Be "genetic factor" the new variable and it affects directly "emotions and lung cancer", we can say that if some of those individuals are genetically predisposed to have lung cancer, this affects their emotions (satisfaction) and therefore, modifying their risk of having diabetes.

If this is so, then the genetic factor could be a lurking variable affecting directly the result of the observational experiment. Then the correct answer is:

A. The researchers may be concerned with confounding that occurs when the effects of two or more explanatory variables are not separated or when some explanatory variables were not considered in a study, but that affects the value of the response variable.

I hope it helps!

3 0
2 years ago
If ABC = DEF, then angle <br> A. SAS congruence <br><br> B. SSS congruence<br><br> C. CPCTC
saveliy_v [14]
Hey there! :D

If you already know that two triangles are congruent, (which is given)

then any other part of the triangle can be proved congruent by CPCTC.

Congruent Parts of Corresponding Triangles are Congruent.

I hope this helps!
~kaikers


8 0
3 years ago
An angle measures 40.2° more than the measure of its complementary angle. What is the measure of each angle?
vampirchik [111]
<h3>Solving for the measurements of Complementary Angles</h3><h3>Answer:</h3>

24.9^{\circ} and 65.1^{\circ}

<h3>Step-by-step explanation:</h3>

Recall that Angles that are complementary to each other add up to 90^{\circ}.

Let a be the measure of the complementary angle.

If an angle is 40.2^{\circ} more than its complementary angle, the measure of that angle is a +40.2. The sum of both angles are expressed a +(a +40.2) but since the have to add to 90 as they are complementary, a +(a +40.2) = 90.

Solving for a:

a +(a +40.2) = 90 \\ a +a +40.2 = 90 \\ 2a +40.2 = 90 \\ 2a +40.2 -40.2 = 90 -40.2 \\ 2a = 49.8 \\ \frac{2a}{2} = \frac{49.8}{2} \\ a = 24.9

Since the other angle measures a +40.2, we can plug in the value of a to find the measure of the angle.

Evaluating a +40.2:

a +40.2 \\ 24.9 +40.2 \\ 65.1

The measure of the angles are 24.9^{\circ} and 65.1^{\circ}

4 0
2 years ago
Find a number such that three less than four times the number is two.
dimaraw [331]
Answer:
X=5/4 or 1.25

Solution:
Make algebraic equation to solve
4x-3=2
Solve
4x=2+3=5
X=5/4

Hope this helps. Please mark brainliest.
4 0
3 years ago
5x+y=0 use the intercepts to graph the equation
IRINA_888 [86]
Y-intercept:  Let x = 0.  Result: 5x=0, and x= 0.  y-intercept is (0,0).
Similarly, x-int. is (0,0) (after going thru the same procedure:  set y=0 and find x)

6 0
3 years ago
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