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jeka57 [31]
3 years ago
12

Dr. Johnson is studying the effects of alcohol consumption on memory. He randomly assigns people to four groups. Three groups co

nsume varying amounts of alcohol, and one group is given only soft drinks. This research design is called a(n) ________.
Mathematics
1 answer:
Hunter-Best [27]3 years ago
8 0

Answer:

Experiment

Step-by-step explanation:

I'm guessing ill look it up later in a dictionary, if its wrong, report the answer.

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What is the factored form of this expression? 4t2 − 27t + 18
seraphim [82]

Answer:

(4t − 3) (t − 6)

Step-by-step explanation:

Using AC method:

Given a quadratic ax² + bx + c, find factors of ac that add up to b.  Divide those factors by a and reduce.  The denominators become the coefficients and the numerators become the constants.

Here, a = 4, b = -27, and c = 18.

ac = 4 × 18 = 72

Factors of 72 that add up to -27: -3 and -24

Divide factors by a: -3/4 and -24/4

Reduce: -3/4 and -6/1

So the factored expression is:

(4t − 3) (t − 6)

5 0
4 years ago
2<br> Do side lengths 23, 16, and 7 create a<br> triangle?<br> Show Your Work
Alexus [3.1K]

Answer:

what type? if right then

7^2+16^2=23^2

49+256=529

305≠529

so its not a right triangle

Step-by-step explanation:

7 0
3 years ago
PLEASE HELPPPPP PLEASE ILL GIVE YOU BRAINLIST
schepotkina [342]

Answer:

12

Step-by-step explanation:

The number of combinations for  2 shirts 3 pants and 2 shoes can be counted from the tree.

Count the different items at the end of the tree

There are 12 different combinations

5 0
3 years ago
F(x)=|x-5|+2<br><br> Evaluate f(3).<br><br> A.) 10<br> B.) 0<br> C.) 4<br> D.) 6
Talja [164]
F(x)=|x-5|+2
plug it in

so f(3)
f3)=|3-5|+2
solve whats inside first
|-2|+2
since its absolute value its actually positive
2+2
4

Your answer is C.) 4
4 0
3 years ago
4.) Mr. Lakey is a taxi cab driver. He earns $5.00 hour plus tips. One week he works 40
Arisa [49]

Answer:

87

Step-by-step explanation:

earning rate (R) = $5/hr

total (T) = $287

time (t) = 40 hr

tips = T - Rt

= $287 - $5*40

$87

3 0
3 years ago
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