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docker41 [41]
3 years ago
6

Determine whether the description corresponds to an observational study or an experiment.Research is conducted to determine if t

here is a relation between stomach cancer and alcohol consumption.
Mathematics
1 answer:
Maslowich3 years ago
8 0

Answer:

Observational

Step-by-step explanation:

Observational studies are studies that measure the outcome of events without the introduction of interventions. They are useful in the formation of a hypothesis. The experiment described above is an observational study that compares two groups so as to measure the predictors of an outcome. No intervention is introduced to influence the outcome of the research.

An experiment on the other hand is often organized as a randomized control trial where subjects are divided into groups and a placebo or control group is introduced to monitor the outcome of the study.

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Which point gives the vertex of ƒ(x) = –x2 + 4x – 3?
Dmitriy789 [7]

Answer:

The vertex is (2,1)

Step-by-step explanation:

ƒ(x) = –x^2 + 4x – 3

Factor out the negative

   = -(x^2 -4x+3)

 Factor

What 2 numbers multiply to +3 and add to -4

-3*-1 = 3

-3+-1 = -4

f(x) =  -( x-3)(x-1)

Find the zeros

0 = -( x-3)(x-1)

0 = x-3   0 = x-1

x=3            x=1

The x value of the vertex is 1/2 way between the two zeros

(3+1)/2 = 4/2 =2

To find the y value, substitute x=2 in

f(2) =  -( 2-3)(2-1)

       =-(-1)(1) = 1

The vertex is (2,1)

4 0
3 years ago
If DB = 36 and AC = 3x - 3, what is the value of x?
algol13

Answer:

A.) 13

Step-by-step explanation:

Since DB =36, and AC is the same line, then AC = 36. The new equation is 36 = 3x - 3. Do inverse operation. Add 3 to both sides of the equation: 36+3=39 & -3+3=0. New equation is 39=3x. Finally divide. 39/3= 13.

3 0
3 years ago
No one was born ugly<br> we just live in a judgmental world
bogdanovich [222]

Answer:

Ikr >:(

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Can anyone help me answer this question (find x)? (15 points)
Greeley [361]

Answer:

The answer to your question is x = 6

Step-by-step explanation:

Process

1.- We can prove that the triangles are congruent.

Two angles measure the same 23°

Two sides measure the same 9

Two angles measure the same the are vertical angles

The third angle measure the same

From this information, we conclude that the triangles are congruent  ASA

2.- If the triangles are congruent then x = 6, the sides are congruent

6 0
3 years ago
Find the​ slope-intercept form of the line whose slope is 2 and that passes through the point (-2,5).
MrRissso [65]

Answer:

xtcygvubhjnlkm;lbu

Step-by-step explanation:

4 0
3 years ago
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