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3 years ago

The following two-way frequency table shows information collected from a survey of

Mathematics

1 answer:

Novay_Z [31]3 years ago

3 0

Answer:

0.62

Step-by-step explanation:

In the picture attached, the table is shown.

We want to find the probability that a student uses the Internet, given that he or she is in eighth grade. Mathematically:

P(Internet | eighth grade) = P(Internet ∩ eighth grade)/P(eighth grade)

P(Internet | eighth grade) = (8/28)/(13/28) = 8/13 = 0.62

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Avani has a loyalty card good for a discount at her local hardware store. The item she wants to buy is priced at $17, before dis

Pachacha [2.7K]

The percentage discount on the item will be equal to 8%.

<h3>What is the percentage?</h3>

The Percentage is defined as representing any number with respect to the 100. It is denoted by the sign %.

Given that:-

Price of the item before tax and discount = $17
After discount and before tax price is = $15.64

The percentage of the discount will be calculated as:-

Percentage discount = ( 17 - 16.64 ) / ( 17 )

Percentage discount= ( 1.36 ) / ( 17 )

Percentage discount = 0.08 x 100 = 8%

Therefore the percentage discount on the item will be equal to 8%.

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5 0

1 year ago

An airplane needs to head due north, but there is a wind blowing from the northeast at 50 km/hr. The plane flies at an airspeed

laiz [17]

Answer: $\theta =2.415^{\circ}$

Step-by-step explanation:

Using vector method to solve it

Resultant can be given by

$R^2=700^2+40^2+2\times 700\times 40cos135$

$R^2=450,408$

R=671.12 Km/hr

The angle made by resultant with 700 km/hr is $\theta$

using sine rule

$\frac{40}{sin\theat }=\frac{R}{sin45}$

$sin\theta =0.0421509$

$\theta =2.415^{\circ}$

8 0

2 years ago

A t-shirt decreased in price by

snow_tiger [21]

Answer:

£20

Step-by-step explanation:

1-1/4=3/4

3/4=15

1*15/3/4

15*4/3=20

7 0

2 years ago

Solve for r in the diagram below.<br> (x + 12)<br> 100°

shusha [124]

Answer:

x = 34

Step-by-step explanation:

The sum of the three angles is 180 since they make a straight line

x+12 + 100 +x = 180

Combine like terms

2x+112=180

Subtract 112 from each side

2x+112-112= 180-112

2x = 68

Divide by 2

2x/2 =68/2

x = 34

7 0

2 years ago

Is it true that (x^2–3x+2)/(x –1) = x – 2, for all values of x? Justify your answer.

Nimfa-mama [501]

Answer:

x²-3x+2=0

x²-2x-x+2=0

(x²-2x)(-x+2)=0

x(x-2)-1(x-2)=0

(x-2)(x-1)=0

x-2=0 or x-1=0

x=2 or x=1

6 0

2 years ago