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
Basile [38]
2 years ago
13

the ratio of red marbles to yellow marbles placed in a bag is 2:7. More marbles are added to the bag: 3 red and 3 yellow marbles

. Maria states that the ratio is still the same since equal amounts of red and yellow marbles were added to the bag
Mathematics
1 answer:
Anvisha [2.4K]2 years ago
8 0

Answer: False.

Step-by-step explanation:

Initially, the ratio is 2:7

This means that if we have 2 red marbles, we must have 7 yellow ones.

The quotient here is 7/2 = 3.5

Now, if you add 3 marbles of each colour, then we have:

2 + 3 = 5 red marbles

7 + 3 = 10 yellow marbles.

Now the ratio is 5:10

This means that for every 5 red marbles, we have 10 yellow ones.

But now we can divide both numbers by the same positive integer, because they have a common factor equal to 5.

5/5 = 1

10/5 = 2

Then we have:

5:10 = 1:2

So the new ratio is 1:2

Then the ratio changed when we added the new marbles, which means that Maria was wrong.

You might be interested in
What is the range of the function for the given domain
AleksAgata [21]

Answer:

thethe answer is the 3rd one

8 0
3 years ago
True or false 6 + 4 + 5 = 5 + 4 + 6
vova2212 [387]
This is true. The numbers being arranged differently in this does not mean it'll not equal each other.
3 0
3 years ago
One-hundred people were surveyed to find if they owned a cat
r-ruslan [8.4K]

Answer:

1. I dont know what format they want you to write it in but its 27/100 which is 0.27 as a decimal and 27% as a percent

2.  it'll be 11/100 which is 0.11 as a decimal and 11% as a percent

Step-by-step explanation:

Since adding up all the people with cats, dogs or both is 73, and theres 100 people surveyed, that means  100-73=27 so 27 people dont have a cat or dog. Therefore its 27/100 which is 0.27 as a decimal and 27% as a percent

For number 2, because 11 people have both a dog and cat I believe itll be 11/100 which is 0.11 as a decimal and 11% as a percent

4 0
3 years ago
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and
Alexxandr [17]

Answer:

P = 0,0012     or   P = 0.12 %

Step-by-step explanation:

We know for normal distribution  that:

μ ± σ  in that range we find 68.3 % of all values

μ ± 2σ      ⇒  95.5 %      and

μ ± 3σ      ⇒  99.7 %  

Fom problem statement

We have to find (approximately)  % of cars that reamain in service between 71 and 83 months

65 + 6 = 71                ( μ + σ )     therefore 95.5 % of values are from 59 and up to 71  then by symmetry   95.5/2  =  49.75 of values will be above mean

Probability between 65 and 71 is  49.75 %

On the other hand 74 is a value for mean plus 1, 5 σ  and

74 is the value limit for mean plus 1,5 σ and correspond  to 49,85 (from z=0 or mean 65).

Then the pobabilty for 83 have to be bigger than 49.85 and smaller than 0,5 assume is 49.87

Finally the probability approximately for cars that remain in service between 71 and 83 months is :  0,4987 - 0.49.75

P = 0,0012     or   P = 0.12 %

8 0
3 years ago
WUTS THE ANSWER IM SO LOST I NEED HELP!!! :(
Alex_Xolod [135]

<em>1/6 = 0.16 acres in 8 minutes. </em>

<em>--</em>

<em>0.16  ÷ 8 = 0.02 acres mowed in 1 minute.</em>

<em>--</em>

<em>(60 minutes in an hour)</em>

<em>0.02 x 60 = 1.2 acres mowed in an hour.</em>

<em>-- </em>

<em>1.2 is equal to 1 1/5, and jami needs to mow 1 1/2 acres.</em><em> so no, jami cannot mow 1 1/2 acres in an hour.</em>

6 0
2 years ago
Other questions:
  • What is the focus of the parabola? y=−1/4x^2−x+3
    13·1 answer
  • I need help will mark brainiest if you give a full answer (with explanation)
    10·1 answer
  • Solve simultaneous equations using an appropriate method.
    14·2 answers
  • Mrs B and Ms R plan to walk 3.75 miles to and from school every day for an entire year. If they meet their goal how many miles w
    15·1 answer
  • Evaluate for x = 2. (12x + 8)/4
    8·2 answers
  • Could someone please explain how to find the composition of a function.
    5·1 answer
  • Trapezoid ABCD is graphed in a coordinate plane.
    5·1 answer
  • Help I’m doing a test !!!!!
    6·2 answers
  • 7
    15·2 answers
  • Shauna drove 75 miles in 3 hours at a constant speed. How many miles did she drive in 2 hours?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!