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4 years ago

D. 61 Just checking I tend to 2nd guess a lot

Mathematics

2 answers:

kramer4 years ago

8 0

WHen you see the word "or" in a probability problem, just add the probabilities together for your answer.

In this case:

52% + 9% = 61% (d)

pochemuha4 years ago

7 0

You're correct: the logical OR operator is true whenever one of the two options is true.

So, the sales of shoes OR socks is given by the 52 and 9%, which together evaluates to $52+9=61$

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Westkost [7]

Answer: a

Step-by-step explanation:

5 0

3 years ago

If (x^2+1)/x = 7 find x^2+(1/x^2)

White raven [17]

Answer:

x²+(1/x²) = 47

Step-by-step explanation:

by identity : (a+b)² = a²+b²+2ab

(x+1/x)²= x²+(1/x)²+2(x)(1/x)

(x+1/x)²= x²+(1/x²)+2....(1)

since : (x²+1)/x = 7

(x²/x) +(1/x) = 7

x + (1/x )= 7

put the value for : x +(1/x) in (1) :

49 = x²+(1/x²)+2

x²+(1/x²) = 47

4 0

3 years ago

Escribe dos radicales equivalentes a cada radical

Alex777 [14]

1.64

2.512

3.27

4.125

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5 0

3 years ago

2 hours after a freight train leaves delhi a passenger train leaves the same station traveling in the same direction at an avera

insens350 [35]

The average speed of the freight train was 10.67 km/hr.

<h3>What is average speed?</h3>

The average speed is the total distance traveled by the object in a particular time interval.

Now it is given that,

Average speed of the passenger train = 16 km/hr

Time taken by passenger train to overtake the freight train = 4 hours

So, the distance between two trains = Average speed of the passenger train * Time taken by passenger train overtake the freight train

⇒ distance between two trains = 16 * 4 = 64 km

Thus, Distance to be covered by freight train = 64 km

Since, freight train leaves the same station in the same direction after 2 hours.

Hence, total time taken to cover 64 km by freight train = 2 + 4

= 6 hours

⇒ Average speed of the freight train = Distance covered by freight train/total time taken to cover 64 km

⇒ Average speed of the freight train = 64/6 km/hr

⇒ Average speed of the freight train = 32/3 km/hr

or, Average speed of the freight train = 10.67 km/hr

Thus, the average speed of the freight train was 10.67 km/hr.

To learn more about average speed:

brainly.com/question/14556289

#SPJ4

5 0

1 year ago

Can somebody please help

Ray Of Light [21]

Answer:

The vertex angle = 28 degrees.

Each of the base angles = 76 degrees.

Step-by-step explanation:

The 2 base angles of an isosceles triangle are equal.

The relation between the vertex angle and one of the base angles is as follows:

2x + y = 180 where x = the measure of a base angle and y = the measure of the vertex angle.

Also, from the information given in the question:

x = 3y - 8

so we have the system of equations:

2x + y = 180........(1)

x - 3y = -8...........(2)

Multiply equation (2) by -2:

-2x + 6y = 16......(3)

Adding (1) and (3):

7y = 196

y = 28.

Substituting for y in equation (2):

x - 3(28) = -8

x = -8 + 84

x = 76.

7 0

3 years ago