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ANEK [815]
3 years ago
7

yesterday, there was 80 problems assigned for math homework. harry did 20% of them correctly. how ,many problems did harry get r

ight?
Mathematics
2 answers:
larisa [96]3 years ago
6 0
80÷100 x 2 ÷10 = 400 ÷ 20 = 15

Igoryamba3 years ago
3 0
400 i think i am pretty sure but if it's wronge i apolize 


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It’s been found that 85% of American adults suffer from triskaidekaphobia (fear of the number 13). Researchers think this is too
uysha [10]

Answer:

Null Hypothesis, H_0 : p \leq 85%

Alternate Hypothesis, H_A : p > 85%

Step-by-step explanation:

We are given that it's been found that 85% of American adults suffer from triskaidekaphobia (fear of the number 13).

A USA Today/Gallup poll asked 1,006 randomly selected people 18 years old and older in telephone interviews "Suppose you checked into a hotel and were given a room on the thirteenth floor. Would this bother you or not?" 87% of the survey respondents answered they would be bothered.

Let p = <u><em>proportion of respondents who would be bothered about given a room on the thirteenth floor</em></u>

SO, Null Hypothesis, H_0 : p \leq 85%

Alternate Hypothesis, H_A : p > 85%

Here, <u>null hypothesis states that</u> the proportion of respondents who would be bothered about given a room on the thirteenth floor is less than or equal to 85%.

On the other hand, <u>alternate hypothesis states that</u> the proportion of respondents who would be bothered about given a room on the thirteenth floor is more than 85%.

Hence, this would be the correct null and alternative hypothesis.

6 0
3 years ago
Insert whether each of the following fractions is proper or improper
Nookie1986 [14]
A fraction with the numerator (the top number) being larger then the bottom is an improper fraction. 4/2
A fraction with the denominator (bottom fraction) being heavier is a proper fraction. 2/4
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3 years ago
Solve the following initial-value problem:<br><br> (ex+y)dx+(3+x+yey)dy=0, y(0)=1<br><br> 0=
alex41 [277]

Answer:

e^x+xy+3y+(y-1)e^y=4

Step-by-step explanation:

Given that

(e^x+y)dx+(3+x+ye^y)dy=0

Here

M=e^x+y

N=3+x+ye^y

We know that

M dx + N dy=0 will be exact if

\frac{\partial M}{\partial y}=\frac{\partial N}{\partial x}

So

\frac{\partial M}{\partial y}=1

\frac{\partial N}{\partial x}=1

it means that this is a exact equation.

\int d\left(e^x+xy+3y+(y-1)e^y\right)=0

Noe by integrating above equation

e^x+xy+3y+(y-1)e^y=C

Given that

x= 0 then y= 1

e^0+0+3+(1-1)e^1=C

C=4

So the our final equation will be

e^x+xy+3y+(y-1)e^y=4

3 0
3 years ago
Mitt is a quality control inspector for a local factory. In today's inspection, Mitt found 5 defective light bulbs out of 60 ins
Otrada [13]

Answer:hahahha

Step-by-step explanation:

Ima just type to get points lol

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3 years ago
Graph the line for y+1=−3/5(x−4) on the coordinate plane.
lyudmila [28]

Answer:

y=-3/5x+7/5

Step-by-step explanation:

put into slope form

Distribute the -3/5

y+1=-3/5x+12/5

subtract the one

y=-3/5x+7/5

3 0
4 years ago
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