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
natima [27]
2 years ago
12

The ratio of red cars to blue cars in a parking lot was 7 : 2.If there were 35 red cars, how many blue cars were there?

Mathematics
1 answer:
Rufina [12.5K]2 years ago
3 0
Let there are x blue cars.
7/2 = 35/x
7x=70
x=10
so there are 10 blue cars.
You might be interested in
A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level
cupoosta [38]

Answer:

The sample required is  n = 135

Step-by-step explanation:

From the question we are told that

     The  standard deviation is  \sigma = 9

      The margin of error is E =  2

     

Given that the confidence level is  99%  then the level of  significance is mathematically evaluated as

         \alpha =  100-99

        \alpha =  1 \%

        \alpha =  0.01

Next we will obtain the critical value  \frac{\alpha }{2} from the normal distribution table(reference  math dot armstrong dot edu) , the value is  

             Z_{\frac{\alpha }{2} } =  Z_{\frac{0.05 }{2} } =  2.58

The  sample size is mathematically represented as

          n = [ \frac{Z_{\frac{\alpha }{2} } *  \sigma }{E} ]^2

substituting values

           n = [ \frac{ 2.58 *  9 }{2} ]^2

            n = 135

3 0
2 years ago
102 hours is 90% of what ?
Leokris [45]
Its 90% of 4 days I think.
Hope I helped C:
6 0
3 years ago
Solution to 3x+4=3x+4
wel

Answer:

6x+8

Step-by-step explanation:

Brainliest?

8 0
2 years ago
Read 2 more answers
You decide to go to a star gazing event there are 12 people in the group
hoa [83]

Answer:

whts the question??

Step-by-step explanation:

8 0
3 years ago
The circumference of a circle is 37.68 meters. What is the area of the circle?
german
The area of the circle is <span>112.98 m squared</span>
4 0
3 years ago
Other questions:
  • Solve the equation 12x + 6y = 24 for x<br><br> Answers above
    6·1 answer
  • Pls help I have a lot to do and it’s all due today
    13·2 answers
  • If g(x)=x² – 5x + 3, find g(-2).
    6·1 answer
  • Solve the differential equation by variation of parameters.<br><br> y''+y=secx
    14·1 answer
  • Tonka weighs 100 pounds. He is loading a freight elevator with
    10·1 answer
  • The chart below show the highest points in California's channel island
    5·1 answer
  • Antonio is building a shelving unit to hold all of his shoes. A pair of work shoes takes up 2 square feet of space, and a pair o
    15·1 answer
  • Find the slope and the y-intercept of the graph of the linear equation. Then, graph the equation.
    6·1 answer
  • Solve for x: 3x +4= 9.2 + 3<br> 1<br> A 3<br> B<br> 6<br> 1<br> 3<br> None of the above.<br> D
    6·1 answer
  • HELP I'M BEGGING YOU SHOW STEPS IF YOU CAN
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!