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
stich3 [128]
3 years ago
5

Rocio leaves point A traveling due east at 40 miles per hour. At the same moment, Li leaves point A traveling due west at 50 mil

es per hour. After how many hours will they be 405 miles apart?)
Mathematics
1 answer:
Afina-wow [57]3 years ago
3 0
Their speed of separation will be equal to the sum of their speeds because they are in opposite directions.
Speed of separation = 40 + 50 = 90 miles per hour

Time = distance / speed
Time = 405 / 90
Time = 4.5 hours
<span />
You might be interested in
The length of a rectangle is 5 ft less than three times the width, and the area of the rectangle is 50 ft². Find the dimensions
Mariulka [41]

Answer

Length = 10 ft

Width = 5 ft

Explanation

Area of the rectangle given = 50 ft²

Let the width of the rectangle be x

So this means the length of the rectangle will be 3x - 5

What to find:

The dimensions of the rectangle.

Step-by-step solution:

Area of a rectangle = length x width

i.e A = L x W

Put A = 50, L = 3x - 5, W = x into the formula.

\begin{gathered} 50=(3x-5)x \\ 50=3x^2-5x \\ 3x^2-5x-50=0 \end{gathered}

The quadratic equation can now be solve using factorization method:

\begin{gathered} 3x^2-5x-50=0 \\ 3x^2-15x+10x-50=0 \\ 3x(x-5)+10(x-5)=0 \\ (3x+10)(x-5)=0 \\ 3x+10=0\text{ }or\text{ }x-5=0 \\ 3x=-10\text{ }or\text{ }x=5 \\ x=-\frac{10}{3}\text{ }or\text{ }x=5 \end{gathered}

Since the dimension can not be negative, hence the value of x will be = 5.

Therefore, the dimensions of the rectangle will be:

\begin{gathered} Length=3x-5=3(5)-5=15-5=10\text{ }ft \\  \\ Width=x=5\text{ }ft \end{gathered}

7 0
1 year ago
In two years tom will be twice as old as 5 years ago how old is tom
lisabon 2012 [21]
In two years tom will become 10 years old
Because 5×2=10
3 0
3 years ago
The coordinates of the vertices of a triangle are (−3,2), (0,−3), and (−4,−2).
sergeinik [125]
The perimeter of the triangle, rounded to the nearest tenth, is 8.5 units.
6 0
3 years ago
Here is the last answers...
Zarrin [17]

Step-by-step explanation:

You are finding the whole

0.7 × 20 = 14

or

70% of 20 = 7/10 x 20 = 7/10 x 20/1 = 140/10

140/10

140/10 = 14/1

The minimum number of questions he need to do are 14

I'm not sure if you are finding the part or the whole

let me know if im wrong

5 0
2 years ago
Read 2 more answers
How do i understand Vertices because i forget sometimes?
Burka [1]
<span>the highest point; the top or apex.<span>
<span>"a line drawn from the vertex of the figure to the base"

</span></span>GEOMETRYeach angular point of a polygon, polyhedron, or other figure.</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • There are 9 balls in a hat the balls are numbered 1-9 you need to choose 3 of the balls. How many possible combinations are ther
    14·1 answer
  • Write the value of the money in dollars Brainliest Awnser gets 7 points for greatness
    5·1 answer
  • The point-slope form of the equation of the line that passes through (–4, –3) and (12, 1) is y – 1 = (x – 12). What is the stand
    9·2 answers
  • What’s the answer to this
    11·2 answers
  • Differentiate Vx(x + 2) with respect to x.
    15·1 answer
  • PLEASE HELP ME WITH QUESTIONS 2-3 IM GIVING 18 POINTS AWAY AND EXPLAIN YOUR ANSWER PLEASE
    10·1 answer
  • What is the value of the exponential expression below?<br> 36 1/2
    5·1 answer
  • Please help i need answer and explanation.
    11·1 answer
  • Divide 81 ft in the ratio 5 :4
    12·2 answers
  • Please help me!!! Bsbebabnababwbabs
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!