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
belka [17]
3 years ago
11

Dave and Mary depart from the bus station at 10 am traveling in opposite directions. Dave's bus is going 40 miles per hour and M

ary's is going 50 miles per hour. At what time will they be 270 miles apart?
Mathematics
2 answers:
loris [4]3 years ago
8 0
  In 3 hours they will be 270 miles apart.
NemiM [27]3 years ago
8 0
Since Dave and Mary are going opposite directions every hour mary will be moving 50 miles away and Dave will be moving 40 miles away meaning they will move 90 miles away from each other every hour. So 270 is 90 times three so in three hours they will be 270 miles away so at 1 pm they will be 270 miles apart.
You might be interested in
Hey guys can yall help me with this math pleaseeeee
yanalaym [24]

Answer:

The answer is 1, -1

Step-by-step explanation:

Because I said so.

5 0
3 years ago
Read 2 more answers
Write an expression to represent the pattern 19, 27, 35, 43
Mama L [17]

Answer

1) The expression to represent the pattern is 11 + 8n

2) The expression to represent the pattern is 80 - 9n

Step-by-step explanation:

1) Lets study the pattern;

- 19 , 27 , 35 , 43 , ..................

27 - 19 = 8

35 - 27 = 8

43 - 35 = 8

The difference is constant between each two consecutive terms

It is an arithmetic sequence

Lets take about the arithmetic sequence

If the first term is a and the constant difference is d

a1 = a , a2 = a + d , a3 = a + 2d , a4 = a+ 3d , ........

an = a + (n - 1)d, where n the position of the term in the sequence

Now we will use this rule to find the expression of our pattern

a = 19 , d = 8

an = 19 + (n - 1)(8) ⇒ an = 19 + 8n - 8 ⇒ an = 11 + 8n

Lets check it;

a3 = 11 + 8(3) = 11 + 24 = 35 ⇒ true

The expression to represent the pattern is 11 + 8n

Step 2) Lets study the pattern;

- 71 , 62 , 53 , 44 , ...

62 - 71 = -9

53 - 62 = -9

44 - 53 = -9

The difference is constant between each two consecutive terms

It is an arithmetic sequence

We will use the same rule above to find the expression of the pattern

a = 71 , d = -9

an = 71 + (n - 1)(-9) ⇒ an = 71 + -9n + 9 ⇒ an = 80 - 9n

Lets check it;

a4 = 80 - 9(4) = 80 - 36 = 44 ⇒ true

The expression to represent the pattern is 80 - 9n

7 0
3 years ago
The graph shown represents the volume of petroleum in a spherical tank with a 15-foot radius as a function of the height of the
shepuryov [24]

Answer:

12.5ft

Step-by-step explanation:

3 0
3 years ago
Which property is used in the problem below? 2(x+4)=2x+8 the associative property the commutative property the distributive prop
Serga [27]
The answer is C) The Distributive property.
2(x+4) got turned into 2x+8.

The distributive property does this:
2 times x plus 2 times 4.

2 times x = 2x
2 times 4 = 8.

So the answer is 2x+8.

C) Distributive property is right.
6 0
3 years ago
Read 2 more answers
David and Eric each shot 6 arrows at the target shown. David shot 4 arrows into A and 2 into B. His score was 18 points. Eric sh
liq [111]
Lets write an equation for each guy's shots and score:
4A + 2B = 18
3A + 3B = 21
To solve we multiply the first equation by -3 and the second by 2:
-12A - 6B = -54
  6A + 6B = 42
--------------------
-12A + 0 = -12
A = 1
to find B we substitute in the first equation:
<span>4A + 2B = 18
</span><span>4(1) + 2B = 18
</span><span>4 + 2B = 18
</span>2B = 14
B = 7
therefore there were given 7 points in an arrow in B
3 0
3 years ago
Other questions:
  • The largest mass extinction in Earth's history occurred at the end of which era? A. Paleozoic B. Mesozoic C. Permian D. Triassic
    13·1 answer
  • In a fruit cocktail, for every 15 ml of orange juice you need 25 ml of apple juice and 10 ml of coconut milk. What proportion of
    11·1 answer
  • ​John's House of Pancakes uses a weighted moving average method to forecast pancake sales. It assigns a weight of 5 to the previ
    14·1 answer
  • As a sale, you are paid $100 per week plus $3 per sale. This week you want your pay to be at least $160. Write an inequality for
    7·1 answer
  • What is the volume of the prism?
    8·1 answer
  • Which point is shown on the y-axis ?
    6·1 answer
  • Is -√3 rational or irrational?
    6·1 answer
  • What are the domain and range of the function f(x)= x4 - 2x2-4?
    6·2 answers
  • Monthly budget for her cell phone bill when she spent 120% of her budget and the bill was 60.00 what’s her monthly budget
    7·1 answer
  • A triangle has sides with lengths of 2 centimeters, 4 centimeters, and 5 centimeters. Is it a right triangle?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!