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2 years ago

Handedness: 18 left-handed

Mathematics

2 answers:

guapka [62]2 years ago

6 0

Answer:

Let x be the number of left handed female students and let y be the number of left handed male students.

Then the number of right handed female students will be 5x and the number of right handed male students will be 9y. Since the total number of left handed students is 18 and the total number of right handed students is 122, the following system of equations must be satisfied.

x+y=18 and 5x+9y=122

Solving this system gives x=10 and y=8.

Thus, 50 of the 122 right handed students are female. Therefore, the probability that a right handed student selected at random is female is the fraction 50/122

which to the nearest thousandth is 0.410.

T is average time spend by shoppers in minutes

N average number of shoppers.

Here, shoppers/hour =84.

Hence r=

T=5

Hence N=rT=

×5=7

Average number of shoppers waiting at checkout =7

Deffense [45]2 years ago

6 0

Answer:

EMMA ITS KAIDN. text back.

Step-by-step explanation:

I had already answered this.

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Please help and explain

Murrr4er [49]

Answer: Option A

$x=\frac{3+i}{2}$ or $x=\frac{3-i}{2}$

Step-by-step explanation:

Use the quadratic formula to find the zeros of the function.

For a function of the form

$ax ^ 2 + bx + c = 0$

The quadratic formula is:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case the function is:

$2x^2-6x+5=0$

$a=2\\b=-6\\c=5$

Then using the quadratic formula we have that:

$x=\frac{-(-6)\±\sqrt{(-6)^2-4(2)(5)}}{2(2)}$

$x=\frac{6\±\sqrt{36-40}}{4}$

$x=\frac{6\±\sqrt{-4}}{4}$

Remember that $\sqrt{-1}=i$

$x=\frac{6\±\sqrt{4}*\sqrt{-1}}{4}$

$x=\frac{6\±\sqrt{4}i}{4}$

$x=\frac{6\±2i}{4}$

$x=\frac{3\±i}{2}$

$x=\frac{3+i}{2}$ or $x=\frac{3-i}{2}$

3 0

3 years ago

Simplify.

Deffense [45]

Step-by-step explanation:

$( \frac{3}{2} ) ^{2} + 4 \div 2 - 3 \\ \frac{9}{4} + 4 \div 2 - 3 \\ \frac{9}{4} + 2 - 3 \\ \frac{9}{4} - 1 \\ \frac{9 - 4}{4} \\ \frac{5}{4}$

5 0

2 years ago

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There were 324 adults surveyed. Among the participants, the mean number of hours of sleep each night was 7.5 and the standard de

kirill [66]

0.17 sense you have to round it to the nearest hundreth

5 0

3 years ago

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Each tire on your bicycle has a diameter of 26 inches.About how far will you travel when the tires make on complete revolution?

ValentinkaMS [17]

Circumference of a circle is an equation

c = (pie) x d or ........ c = 2(pie) × r
c = 3.14 × d or ...... c = 2(3.14) x r

d is the diameter and r is radius

c = (3.14) x 26
c = 81.64 in.

6 0

3 years ago

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PLEASE HELP 25PT

Bess [88]

Hi

1.If Mrs.Walters drives 360 miles on 25 gallons of gas , she drives 14.4 miles on 1 gallon of gas .

Work; I made a proportion , but you can just divide 360 and 25 .
x=14.4 miles

If Mr.Walters drives 480 miles on 32 gallons of gas , he drives 15.06 miles on 1 gallon of gas .
x=15.06 miles
2. Mr.Walter because he drives more miles with a gallon .
Work; 15.06 miles is greater than 14.4 miles.

Hope it helps and have a wonderful day.

7 0

3 years ago