All categories

3 years ago

Find the probability that the next student will select hamburger for lunch. You

Mathematics

1 answer:

adell [148]3 years ago

6 0

Answer=3/10

Step wise =

Total number of student=40

student who eat Hamburger=12

now,

Probability of eating hamburger student = 12/40

=3/10

You might be interested in

Together, Aanya and Krish can wash and wax Aanya's car in 50 minutes. Alone it takes Krish ten minutes more than Aanya. To the n

Leto [7]

Answer:

95 ; 105

Step-by-step explanation:

Let :

Aanya's time = x

Krish's time = x + 10

Together = 50

Hence

Aanya's rate = 1/x

Krish's rate = 1/(x + 10)

Together rate = 1/50

Hence,

1/x + 1/(x + 10) = 1 / 50

((x + 10) + x) / x(x + 10) = 1/ 50

(2x + 10)/ x² + 10x = 1/50

50(2x + 10) = x² + 10x

100x + 500 = x² + 10x

x² + 10x - 100x - 500 = 0

x² - 90x - 500 = 0

Using the quadratic equation solver :

x = 95.24 ; x = - 5.24

Time can't be negative

Hence, x = 95 (nearest minute)

It takes Aanya 95 minutes Alone a ND

Krishna (95 + 10) = 105 minutes alone

6 0

3 years ago

the graph shows that lisa's earnings are proportional to the number of hours that she works.This relationship can be represented

Annette [7]

c. 25 because she gets $25 per hour

3 0

3 years ago

What is the chance of rolling two dice and the dice add up to six?

emmainna [20.7K]

around 13% chance

Step-by-step explanation:

5 0

3 years ago

Answer this pls pls pls pls pls

kotegsom [21]

Answer:

1= 0.25feet per 1 second

2.= 120 seconds

3. 72 seconds or 1 minute 12 seconds

Step-by-step explanation:

1.= 2/8=1/4=.25

2.= 50-20=30

30/.25=120

3.= 18 feet/.25 feet= 72 seconds

3 0

2 years ago

Read 2 more answers

Please give the answer

Alex

Step-by-step explanation:

f(a):

So for this you simply plug in "a" as x, and this doesn't really do anything beside replace all values with x, so you just have the equation:

$f(a) = 5a+4$

2 f(a):

So for this one, you want to represent f(a) using the equation it's equal to (5a + 4), and substitute it in for f(a). In doing so, you get the expression:

2*f(a) -> 2(5a + 4) -> 10a + 8

f(2a):

So this is very similar to the first question, although you will have to do some multiplication. So just plug in 2a as "x" to get the equation:

$f(2a) = 5(2a) + 4 = 10a+4$

f(a+2):

Basically the same process, you plug in (a+2) as "x" and simplify:

$f(a+2) = 5(a+2) + 4\\f(a+2) = 10a+10+4\\f(a+2) = 10a+14$

f(a) + f(2):

This is similar to the second question, and you simply want to replace the f(a) with the equation that represents it (5a + 4) and same thing for f(2) = 5(2) + 4

$f(a) + f(2) = (5a+4)+(5(2)+4) \\f(a) + f(2) = (5a+4)+(10+4)\\f(a)+f(2) = (5a+4) + (14)\\f(a) + f(2) = 5a+18$

7 0

2 years ago