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
VARVARA [1.3K]
3 years ago
7

Ted is a long distance driver. It took him 30 min longer to drive 275km on the Trans-Canada highway west of Swift Current, Saska

tchewan, than it took him to drive 300km east of Swift Current. He averaged 10km/h less while travelling west of Swift Current due to more severe snow conditions. What was Ted's average speed for each part of the trip?
Mathematics
1 answer:
IRISSAK [1]3 years ago
7 0

Speed traveling west = x - 10 km /hr


275 / ( x-10) - 300 / x = 1/2



275 *2x - 300 (x-10)*2 = ( x-10) *x



550x - 600x +6000 = x^2 -10x



x^2 +40x - 6000 = 0


( x -60) ( x+100) = 0


x = 60


ANSWER East = 60 km/ hr West = 50 km /hr


CHECK


300 /60 = 5 hours

275 /50 = 5.5 hours

You might be interested in
Draw the number 24 then draw a quick picture to show 24 after you have to regrouped 1 ten as 10 ones explain how both pictures s
Vesnalui [34]
First draw 24 shapes of your choice.

Then, in a different space or below those 24 shapes, draw 10 more shapes twice. So draw 10 shapes and draw 10 more next to them. Finally, draw 4 more shapes with space between them and say "10+10+4=24"
6 0
3 years ago
PLEAEE HELP. ITS A SUPER EMERGENCY ​
Nataly_w [17]
I cant see the picture ummm
6 0
2 years ago
I need help with 11.
ioda

Answer:

Step-by-step explanation:

last one

3 0
3 years ago
A sample of 300 urban adult residents of a particular state revealed 65 who favored increasing the highway speed limit from 55 t
forsale [732]

Answer and explanation:

Null hypothesis(H0) says sentiment for increasing speed limit in the two populations is the same

Alternative hypothesis(Ha) says sentiment for increasing speed limit in the two populations is different

Where p1 is the first population proportion =65/297= 0.22

And p2 is the second population proportion = 78/189= 0.41

P= p1+p2/n1+n2= 65+78/297+189= 0.29

Hence H0= p1-p2=0

Ha=p1-p2≠0

Test statistic= p1-p2/√p(1-p) (1/n1+1/n2)

= 0.22-0.41/√0.29(1-0.29)(1/297+1/189)

= -4.49

Critical value at 95% significance level= 1.96( from tables)

We therefore reject null hypothesis as critical value is greater than test statistic

Therefore the sentiment for increasing speed limit in the two populations is different

b. at proportions of 0.24 and 0.40 for p1 and p2 respectively

Test statistic = 0.24-0.40/0.29(1-0.29)(1/297+1/189)

= -3.78

P value is 0.0002 at 0.05 significance level

Hence probability =0.4998

7 0
3 years ago
In triangle MPQ points N and R are located on sides MP and QP with NR drawn. which set of measurements below would justify that
NNADVOKAT [17]
The answer is number 1. Because 12/10 =20/18 is a true statement. None of the others are true
6 0
2 years ago
Other questions:
  • G use the margin of error, confidence level, and standard deviation σ to find the minimum sample size required to estimate an un
    5·1 answer
  • Can someone please explain this and Answer it
    15·2 answers
  • Sketch the graph of y=(x-5) squared +3
    15·1 answer
  • HELP FAST!! Which of the following could be the measures of the interior angles of a triangle? A. 14°, 44°, 112° B. 18°, 55°, 12
    14·1 answer
  • A car originally cost $22,955. It is now being sold for $19,700. What is the percent change? Is it an increase of a decrease? Ro
    10·2 answers
  • What is the value of x?<br><br><br><br> Enter your answer in the box.<br><br> x =
    12·1 answer
  • A cafeteria has a special: one hamburger and one order of fries is $5.49, and one hamburger and two orders of fries is $6.99. De
    8·1 answer
  • How can you determine if two figure are identical
    7·1 answer
  • The perimeter of the rectangle below is 124 units. Find the length of side cd
    12·1 answer
  • Analytically determine what type(s) of symmetry, if any, the graph of the equation would possess. Show your work.23) 2x^2 -3 = 4
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!