1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Agata [3.3K]
3 years ago
15

Sam bought 6 baseball trading cards to add to his collection. The next day his dog ate half of his collection. There are now 27

cards left. How many cards did Sam start with?
Mathematics
2 answers:
enyata [817]3 years ago
7 0
He started with 42 cards.

27-6= 21

21×2= 42.

Hope this helps! :)

\(^ ◇^)/
slamgirl [31]3 years ago
6 0
27 times 2 equals 54.
54 minus 6 equals 48.

Resolve: 48 plus 6 equals 54.
54 divided by 2 equals 27.
You might be interested in
Help me I need help with this factorization of 630?
nignag [31]

Answer:

The prime factors are: 2 x 3 x 3 x 5 x 7

or also written as { 2, 3, 3, 5, 7 }

Written in exponential form: 2 x 3 × 3 x 5 ×1  x 7×1

6 0
3 years ago
Steven estimates how long his computer repairs will take. He discovers that ABC Tech and Tech Squad will charge the
katrin2010 [14]

You didn't include the costs of doing repairs at both computer repair firms. I fixed that for you.

ABC Tech ------- $20 service charge plus $15 per hour.

Tech squad ------- $30 service charge plus $10 per hour.

Answer:

Steven's estimate of the repair time is 2 hours.

Step-by-step explanation:

Now in this case, we were told that ABC Tech normally charges $20 service charge and $15 per hour of computer repair service. The second tech firm charges $30 service charge and $10 per hour for computer repair service. We are now simply required to find out or calculate the number of hours of computer repair service whereby the cost of doing repairs at both tech firms become equal.

Let us use "x" to represent that unknown number of hours. The equation needed to calculate this is:

20 + 15x = 30 + 10x

We then pair like terms

15x - 10x = 30 - 20

5x = 10

x = 10/5

x = 2

Therefore the number of hours of computer repair service whereby the cost of doing repairs at both tech firms become equal is 2 hours.

8 0
3 years ago
In order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estim
Sonja [21]

Answer:

Step-by-step explanation:

Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.

Std deviation =4.5 errors

95% confidence interval = Mean±1.96*std dev

Hence we have

1.96(\frac{4.5}{\sqrt{n} } )

\sqrt{n} \geq 4.41\\n\geq 19.4481

Sample size should be 20.

8 0
2 years ago
Help with this question, please
Leya [2.2K]

Answer:

12.57 inches

Step-by-step explanation:

the formula is l = x/360 (2 pi r) so you solve from there

8 0
2 years ago
Peter is 2 years older than Winnie. Peter's age is 16 years less than seven times Winnie's age. The equations below model the re
Airida [17]

Answer:

The second one.

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • A massage costs $81.50 per hour. How much will a massage for 2.5 hours cost
    11·2 answers
  • What numbers multiply to -35 and add up to -2?
    6·2 answers
  • Find the volume of the pyramid. h=8.5ft 10ft 10ft.
    15·1 answer
  • A piano has 52 white keys. Write and use an equation to find the number of octaves on a piano keyboard.
    6·1 answer
  • Context does not dictate when to overestimate and when to underestimate always round down true or false
    8·2 answers
  • How is this ejercice: 15+x=4
    5·1 answer
  • Heeeelp pls i beg of you​
    6·1 answer
  • At a summer camp there are 40 boys out of 70 campers what is the ratio written as a fraction in simplest form
    7·1 answer
  • PLEASE HELP I WILL GIVE YOU BRAINLIST I NEED HELP PLEASE
    13·1 answer
  • Find the LCM of 24,60 and 54
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!