All categories

3 years ago

I am a number between 78 and 88. I have a 3 in the ones place. What number am I?

Mathematics

2 answers:

Rudiy273 years ago

8 0

Answer:

Step-by-step explanation:

Because 3 is in the ones place between 78 and 88.

dezoksy [38]3 years ago

3 0

83, the only number between 78 and 88 that has a 3 in the ones place.

Hope this helps!

You might be interested in

What is 3/5 written as a percent? A 3.5% B 30% C 35% D 60%

goldfiish [28.3K]

D is the correct answer.

6 0

3 years ago

Read 2 more answers

REINFORCE Tickets to the zoo cost $18 for adults and $8.25 for children. One day, the zoo sold 2,300 tickets and collected $30,1

jenyasd209 [6]

Given:

The cost of adults ticket = $18

The cost of children's ticket = $8.25

Total tickets = 2300

Total revenue = $30,168.

To find:

The number of children and number of adults attended the zoo that day.

Solution:

Let x be the number of children and y be the number of adults.

Equation for tickets: $x+y=2300$ ...(i)

Equation for revenue: $18x+8.25y=30168$ ...(ii)

Plot the graphs of the given equations on a coordinate plane as shown below.

From the graph it is clear that the graph of both equations intersect each other at (1148,1152).

It means the number of adults is 1148 and the number of children is 1152.

It can be solved algebraically as shown below:

Substitute the value of y in (ii) from (i).

$18x+8.25(2300-x)=30168$

$18x+18975-8.25x=30168$

$9.75x=30168-18975$

$9.75x=11193$

Divide both sides by 9.75.

$x=\dfrac{11193}{9.75}$

$x=1148$

Putting $x=1148$ in (i), we get

$1148+y=2300$

$y=2300-1148$

$y=1152$

Therefore, the number of adults is 1148 and the number of children is 1152.

8 0

3 years ago

If anyone can give me the answer that will be greatly appreciated :)

vfiekz [6]

42-x=58

or, -x=58-42

with change in side sign also chamges we change sides to make like terms in one side and unlike in amother side.

or, -x= 16

or,x=-16.

therefore x=-16...

Hope this helps you.

3 0

3 years ago

Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the ot

Softa [21]

Answer:

a. Mean = 4.5, Standard Deviation = 1.775

b. 0.0152

Step-by-step explanation:

Given

n = 15 purchasers

p = Success = 30%

p = 0.3

q =Failure = 70%

q = 0.7

Mean = np

Mean = 15 * 0.3

Mean = 4.5

Standard Deviation = √Variance

Variance = npq

Variance = 15 * 0.3 * 0.7

Variance = 3.15

Standard Deviation = √3.15

Standard Deviation = 1.774823934929884

Standard Deviation = 1.775 ---------- Approximated

The probability that the number who want new copies is more than two standard deviations away from the mean value

Standard Deviation = 1.775

Mean = 4.5

2 Standard Deviation and Mean = 2 * 1.775 + 4.5

= 3.55 + 4.5

= 8.05

P(X>8.05) = P(9) + P(10) +........+ P(15)

Using the binomial distribution

(p + q) ^ n where p = 0.3, q = 0.7 , n = 15

Expanding (p+q)^n where n = 15 and r > 8

We have

15C9 p^9 q^6 + 15C10 p^10 q^5 + 15C11 p^11 q⁴ + 15C12 p^12 q³ + 15C13 p^13 q² + 15C14 p^14 q + p^15

= 5005 (0.3)^9 (0.7)^6 + 3003 (0.3)^10 (0.7)^5 + 1365 (0.3)^11 (0.7)⁴ + 455 (0.3)^12 (0.7)³ + 105 (0.3)^14 (0.7)² + 15 (0.3)^14 (0.7) + 0.3^15

=0.015234

7 0

3 years ago

What is 4/5 of 3,600

Kitty [74]

2880; to find this out you can just multiply 4/5 by 3600.

3 0

4 years ago

Read 2 more answers