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
umka2103 [35]
3 years ago
8

A motorboat travels 448 kilometers in 8 hours going upstream and 440 kilometers in 5 hours going downstream. What is the rate of

the boat in still water and what is the rate of the current?
Mathematics
1 answer:
liubo4ka [24]3 years ago
4 0

9514 1404 393

Answer:

  • boat: 72 km/h
  • current: 16 km/h

Step-by-step explanation:

The speed difference between boat and current is the upstream rate:

  (448 km)/(8 h) = 56 km/h

The sum of speeds of boat and current is the downstream rate:

  (440 km)/(5 h) = 88 km/h

The rate of the boat is half the sum of these:

  (56 +88)/2 = 72 . . . km/h

The rate of the current is half their difference:

  (88 -56)/2 = 16 . . . km/h

The rate of the boat is 72 km/h; the rate of the current is 16 km/h.

You might be interested in
What is 25% of $1200?<br> A) 900<br> B) 250 <br> C) 600 <br> D) 300
alexandr1967 [171]

Answer:

The answer Is D

Step-by-step explanation: I looked it up on Google, next time just type it into Google because it will solve it on a calculator for you.


8 0
3 years ago
Read 2 more answers
Someone please solve this. If m(x)= x^3 - 5x + 7 &amp; f(x)= 2x - 3 What does: m(-3) - f(-3)
timofeeve [1]

Answer:

-2

step by step

(-3)^3-5(-3)+7-((2(-3)-3))

-27+15+7-(-6-3)

-27+15+7-(-3)

-27+15+7+3

-27+25

=-2

8 0
3 years ago
Carolina leaves her house and walks 6 blocks she turns and heads east 8 blocks until she reaches matties house what is the short
s2008m [1.1K]

Answer:

10 blocks

Step-by-step explanation:

Given

First = 6\ blocks

Second = 8\ blocks east

Required

Determine the shortest possible distance

To better explain my solution, I've added an attachment that illustrates her movement.

Using the attachment as a point of reference, the shortest distance is calculated by calculating the length of the hypotenuse using Pythagoras theorem.

So, we have:

x^2 = 6^2 + 8^2

x^2 = 36 + 64

x^2 =100

Take positive square root of both sides

x = \sqrt{ 100

x = 10

5 0
3 years ago
Which best explains whether or not all isosceles triangles are similar? All isosceles triangles are similar. Two angles within e
Contact [7]
By Angle-Angle  simlilarity postulate :
If two angles of one triangle congruent to two angles of another, then triangles must be similar.
So, I think the answer is
<span>All isosceles triangles are not similar. The pair of congruent angles within one triangle is not necessarily congruent to the pair of congruent angles within the other triangle.

Because two base angles in  </span>isosceles triangle are congruent, but it could be a lot of isosceles triangles that have different  congruent base angles.
 For example,
45-45-90 is an isosceles triangle, and 30-30-120 is an isosceles triangles, but they do not have 2 congruent angles.
7 0
3 years ago
32 pages to 28 pages percent of change
pychu [463]

Answer:

Youre answer is 12.5%

Step-by-step explanation:

Percent change is calculated as

Change original×100%

Change =32−28=4 pages

=4

1328×100%=1008%=

And then your final answer:

12.5%

Glad I could help, hv a good day :3

4 0
3 years ago
Other questions:
  • Sam knows that his annual homeowners insurance premium is $0.27 per $100 of value, which usually works out to be $683.10 annuall
    12·1 answer
  • Gena attached a dog ramp to her sofa, which allows her oldest dog to easily climb onto a seat cushion. The ramp is 55 inches lon
    5·1 answer
  • Can somebody help me with this question
    9·2 answers
  • Knowing that 2i is one answer to the equation x^4 - 2x^3 + 6x^2 - 8x + m = 0, find the 'm' and the other possible answers.
    6·1 answer
  • Attachment look at it dude
    8·1 answer
  • Is this a polynomial, if so whats the degree
    14·1 answer
  • I’m not sure which answer it is !??
    11·1 answer
  • I need help ASAP !!!!!!
    10·1 answer
  • What is the range of function g if g(x) =-2f(x-3)
    10·1 answer
  • A box had twice as many grapes as a basket. Once 2 kg of grapes were added to the basket, it contained 0.5 kg more than the box.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!