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3 years ago

Can you help me on question 25?!

Mathematics

1 answer:

Gre4nikov [31]3 years ago

4 0

Not sure if I’m correct because I don’t know if I solved it the right way but it should be(and this is just a guess) A.

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Evaluate the expression when n=9.<br> n2-14

Semenov [28]

Answer:

Step-by-step explanation:

9×2-14(n=9)
18-14
4 is answer

5 0

3 years ago

Mike and Pat traveled 492 miles in seven hours. If they travel at the same rate, how long will it take them to travel 728 miles?

LenKa [72]

10 hours and 37 min?

4 0

4 years ago

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A train station employee collects data on 160 incoming trains to the station. He notices that 18 of the 90 incoming trains on li

Elena L [17]

Answer:

Probability of a train on line A arriving on time: 80%

Probability of any train arriving on time: 96%

Step-by-step explanation:

If 18 of the 90 incoming trains on line A arrive late, we have that 90 - 18 = 72 trains of the 90 arrive on time, so the probability of a train on line A arriving on time is:

P(A) = 72/90 = 0.8 = 80%

on line B, we have that 70 - 14 = 56 trains of the 70 arrived in time, so the probability of a train from line B arriving on time is:

P(B) = 56/70 = 0.8 = 80%

To find the probability of any train arriving on time, we can use this formula:

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 0.8 + 0.8 - 0.8*0.8

P(A or B) = 1.6 - 0.64 = 0.96 = 96%

4 0

3 years ago

Simplify x - 2 / 7(x-2)^2

VashaNatasha [74]

Answer:

1 / 7 (x - 2)

Step-by-step explanation:

x - 2 / 7(x - 2)^2

= (x - 2) / 7 (x - 2) (x - 2)

= 1 / 7 (x - 2)

7 0

3 years ago

Consider the following sets. U = {ordered pairs on a coordinate plane} A = {ordered pair solutions to y = x} B = {ordered pair s

4vir4ik [10]

Answer:

(0,0)

Step-by-step explanation:

We have,

U = { (x,y) : x,y belong to real numbers }

A = { (x,y) : (x,y) is a solution of y=x }

B = { (x,y) : (x,y) is a solution of y=2x }

We need to find the ordered pair (x,y) that belong to A $\bigcap$ B.

Let, (x,y) belong to A $\bigcap$ B

i.e. (x,y) belong to A and (x,y) belong to B

i.e. y = x and y = 2x

i.e. x = 2x

i.e. x = 0

Now, substitute x= 0 in any of the equation say y = x, we get y = 0.

Hence, the ordered pair satisfying A $\bigcap$ B is (0,0).

5 0

3 years ago

Read 2 more answers