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Svetach [21]
2 years ago
8

What will be 50% of 42

Mathematics
2 answers:
zimovet [89]2 years ago
7 0
Twenty one is the answer
Airida [17]2 years ago
7 0

To find 50% of 42, first write 50% as a decimal by moving the decimal point 2 places to the left to get .50.

Next, the word "of" means multiply, so we have to multiply.

(.50) × (40) = 21

Therefore, 50% of 42 is 21.

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It is a rectangle and I need to get x and the top is -1+4x and the bottom is 3x+3 I’m in 8th grade geometry
Rainbow [258]

Answer:

The value of x is 4.

Step-by-step explanation:

Consider a Rectangle ABCD

AB as Top

CD as Bottom

AB = -1 + 4x

CD = 3x + 3

To Find:

x = ?

Solution:

In a Rectangle ABCD

Opposite sides of Rectangle congruent,......Property of Rectangle

AB = CD

Top = Bottom

On substituting we get

-1+4x=3x+3\\\\4x-3x=3+1\\\\x=4\\

Therefore the value of x is 4.

6 0
3 years ago
3. 3(a + 1) - 5 = 3a - 2<br>a=​
Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

6 0
3 years ago
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Explain how you would use a number line to find to find the absolute value of-12
victus00 [196]
So a absolute value is just the opposite of the value given, (unless it is a positive number) so you start on -12 and count 24 units to the right so it would make positive 12
8 0
3 years ago
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a pharmacist believes the proportion of prescriptions that are antibiotics is decreasing. the pharmacist would like to test the
Lunna [17]

Since,Z < -1.65 we reject H₀

i.e there is enough evidence for the pharmacist to reject the null hypothesis

What is the null hypothesis?

Conjectures used in statistical tests, which are formal techniques for drawing conclusions or making judgments based on data, include the null hypothesis and the alternative hypothesis. The hypotheses, which are based on a sample of the population, are suppositions regarding a statistical model of the population. The tests are essential components of statistical inference and are frequently used to distinguish between statistical noise and scientific claims when interpreting experimental data in science.

"The null hypothesis is the proposition under investigation in a statistical significance test. The significance test is intended to determine how strong the evidence is against the null hypothesis. The null hypothesis is typically a claim that there is "no effect" or "no difference.H₀ is a common way to represent it.

The alternative hypothesis is the assertion that is being compared against the null hypothesis. Two symbols are H₁ and Hₐ.

Calculation:

Here H₀:  P=0.52

  H₁: P<0.52

Test statistic, Z = -1.89

critical value = -1.65

Decision rule: If zZ< -1.65 we reject H₀ and vice-versa

Since,Z < -1.65 we reject H₀

i.e there is enough evidence for the pharmacist to reject the null hypothesis

Learn more about the null hypothesis here:

brainly.com/question/13776238

#SPJ4

Disclaimer: The question was given incorrectly on the portal. Here is the correct question

Question:

6 0
1 year ago
Find the intersection of the following sets.<br><br>a= 1,2,3,4,5,6,7,8 b= 2,4,6,8,10<br>​
Neporo4naja [7]

{2,4,6,8}

Intersection means common elements in both sets

7 0
2 years ago
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