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
borishaifa [10]
3 years ago
7

3. James drives for 5 hours at a certain speed and then for 4 hours at a speed 6 km/h greater than his original speed. If he dri

ves 294 km altogether, what was his first speed?
Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
4 0

Answer:30km/hr

Step-by-step explanation:

Total distance=294km

Speed=s

Distance=d

Time=t

First drive:

t=5

d=s x t

d=s x 5

d=5s

Second drive:

t=4

Speed is 6km/h greater than the first speed

The new speed= s+6

d=4(s+6)

Total distance=294

5s + 4(s + 6)=294

5s + 4s + 24=294

Collect like terms

5s + 4s=294 - 24

9s=270

Divide both sides by 9

9s/9=270/9

s=30

First speed=30km/hr

You might be interested in
I drove to my parents' house at 60 miles per hour. if i had driven 50 miles an hour instead, then i would have gotten there 40 m
Fittoniya [83]
Use distance = rate x time

Let "t" be the time it took for you to drive to your parent's house at 60mph.

So 60t would be the distance.

And "t+40" would be the time it took for you to get to your parent's house at 50 mph.  And that total distance would be 50(t+40).

Since both the distances are the same, this gives us the equation:

60t = 50(t+40)

Simplify:  60t = 50t + 2000
10t = 2000
t = 200 minutes

Driving at 60 mph for 200 minutes equates to a total distance of 200 miles.
5 0
3 years ago
Find the missing measure in each pair of similar shapes.
Vikki [24]
If your missing a sid but you have the other side opisite sides are the same
7 0
3 years ago
What is 20/8 in simpliest form?
Setler [38]
5/2! Because if you divide both by four! (Most common Denominator!)
3 0
3 years ago
Read 2 more answers
Question 9 of 10
PSYCHO15rus [73]

Answer:

Please could you add an image, maybe I could answer then

Step-by-step explanation:

5 0
3 years ago
Help with these questions plzz!! only 2 questions
Reil [10]

Answer:

x=100

not sure about the answer

6 0
2 years ago
Other questions:
  • A homeowner has 20 feet of fencing material to enclose a rectangular area for his pets. the rectangular area is adjacent to a ho
    9·1 answer
  • Mr. Collins made 20 bird houses to sell at a carnival. He earns $15 for each bird house he sells. How much will Mr. Collins earn
    15·1 answer
  • Which inequality is equivalent to this one?<br>Y-8≤-2​
    13·1 answer
  • the point-slope form of the question of the line that passes through (-4,-3) and (12,1) is y-1=1/4(x-12). what is the standard f
    15·1 answer
  • Dylan buys 3.2 pounds of grapes for $2.56. What is the price per pound of the grape.
    5·1 answer
  • Given f(x) and g(x)= f(x+k), use the graph to determine the value of k.
    13·1 answer
  • Please help me..please
    14·1 answer
  • Which statement is always true?
    9·1 answer
  • You are traveling in a car. Your speed is 40 miles per hour. What is your speed in feet per minute?
    6·1 answer
  • Make x the subject of the formula x/a -b=c
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!