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Evgesh-ka [11]
3 years ago
8

Which of the following expressions is equivalent to a(4-a)-5(a+7)

Mathematics
2 answers:
MissTica3 years ago
5 0

Answer:

-a² - a - 35

Step-by-step explanation:

a(4 - a) - 5(a + 7)

(4a - a²) - (5a + 35)

4a - a² - 5a - 35

-a² - a - 35

Licemer1 [7]3 years ago
4 0

Answer:

dude give answer choices


Step-by-step explanation:


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The growth of bacteria is modeled as P = P0ert. In a sample culture, the bacteria grows at a rate of 6 percent per minute. If th
xxTIMURxx [149]
Initial number of Bacteria = Po = 1000
Growth rate = r = 6% = 0.06
We want to find the number of Bacteria after 5 minutes.

Using the given equation, we can write:

P= P_{o}e^{rt} \\  \\ 
P=1000(2.718)^{0.06*5}  \\  \\ 
P=1000(2.718)^{0.3} \\  \\ 
P=1350

Rounding of to nearest integer, the number of Bacteria after 5 minutes will be 1350. So option C gives the correct answer
5 0
3 years ago
True or False: A p is the probability that the results are not due to chance, the probability that the null hypothesis (H0) is f
professor190 [17]

Answer:

False

Step-by-step explanation:?

The hypothesis tests compare weather an event is meant to alter a population mean results, for example, a scientist experiment might have or not have a significant effect over the population results. The test aims to reject the null hypothesis, so what it really want to find out is if the alternative Hypothesis H1 is likely true. The null hypothesis is the probability that the results are not due to chance – if it’s rejected, then the results are due to chance.The level of significance , or so called p-value, is the probability that the null hypothesis (H0) happen , If p is very small then the null hypothesis is rejected - isn’t true- and the alternative Hypothesis is accepted. A higher P value implies a higher probability than results are not happening so that the H0 is accepted and H1 rejected. The null Hypothesis will normally will rejected when the level of significance are either lower than 0.05 or 0.01, the lower P value the higher the level of confidence that the results are due to chance.

Since the first part of the statement (A p is the probability that the results are not due to chance) is correct, and the second part is wrong (…the probability that the null hypothesis (H0) is false), the total statement is false. The correct statement would be as follows : A p is the probability that the results are not due to chance, the probability that the null hypothesis (H0) is true.  

7 0
3 years ago
Determine which windsurfer is traveling faster. EXPLAIN YOUR REASONING 5meters per second or 720 feet per minute.
alexdok [17]
The first windsurfer is travelling faster. Solution:
1 meter = 3.28084 feet
The first surfer travels at 5 meters/second so you have to multiply 3.28084 by 5 which equals 16.4042 ft/second
There are 60 seconds in a minute so you will have to multiple 16.4042 ft/second by 60 seconds which equals 984.252 ft/minute

984.252 ft/minute > 720 ft/minute
5 0
3 years ago
Given: If x, then not y, if not y, then z.<br> Y is true. So:
Fed [463]

If x, then not y, if not y, then z. Y is true. So: X is true, Z is True

<h3>How to Interpret Conditional Statements?</h3>

A conditional statement is a type of structure to express the relationship between two dependent variables. Its structure is as follows:

If P, then Q...

Now, from the question we are told that;

If x, then not y, if not y, then z.

Y is true. So:

Now, when looking at conditional statements in depth, and comparing to this question we can easily see that since Y is true, then it means that if X is true, then Z is also true.

Thus,

If x, then not y, if not y, then z.

Y is true. So: X is true, Z is True

Read more about Conditional Statements at; brainly.com/question/11073037

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8 0
1 year ago
3^-6 x (3^4 divided by 3^0)^2. simplfyed i need it quick im about to guess
11111nata11111 [884]

Answer:

Step-by-step explanation:

first the parenthesis

3^4/3^0=3^4

anything raised to the power of 0 is 1

(3^4)^2=3^8     you multiply the powers

3^-6 * 3^8= 3^(-6+8)=3^2

7 0
3 years ago
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