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
Svetlanka [38]
3 years ago
12

Please help :) :) :)

Mathematics
1 answer:
Hatshy [7]3 years ago
7 0

<span>A motorboat travels 222 km in 6 hours going upstream.
Rate = distance/time = 222/6 = 37 km/hr
----------------------
It travels 390 km going downstream in the same amount of time.
Rate = distance/time = 390/6 = 65 km/hr
---------
What is the rate of the boat in still water and what is the rate of the current?
Equations:
Upstream: b-c = 37 km/hr
Downstrm: b+c = 65 km/hr</span>

<span>Add and solve for "b":
(2)b = 102 km/hr
b = 51 km/hr (speed of the boat in still water)
-----
Solve for "c":
b+c = 65
51 + c = 65
c = 14 km/hr (speed of the current)</span>


You might be interested in
Which expression has a value of 26 when a=4 and b=5
alekssr [168]

Answer:

a=4

Step-by-step explanation:

5 0
3 years ago
Factor completely 4x^5-20x^3
nikdorinn [45]

Answer:

<em>4x^3(x^2 - 5)</em>

Step-by-step explanation:

First, try to factor a common factor.

GCF of 4 and -20 is 4.

GCF of x^5 and x^3 is x^3.

Factor out 4x^3.

4x^5 - 20x^3 =

= 4x^3(x^2 - 5)

3 0
3 years ago
Given the quadratic equation <img src="https://tex.z-dn.net/?f=y%20%3D%202%28x%20-1%29%5E%7B2%7D%20%2B%208" id="TexFormula1" tit
Sunny_sXe [5.5K]

Answer:

Part 1) "a" value is 2

Part 2) The vertex is the point (1,8)

Part 3) The equation of the axis of symmetry is x=1

Part 4) The vertex is a minimum

Part 5) The quadratic equation in standard form is y=2x^{2}-4x+10

Step-by-step explanation:

we know that

The equation of a vertical parabola into vertex form is equal to

y=a(x-h)^{2}+k

where

(h,k) is the vertex of the parabola

if a > 0 then the parabola open upward (vertex is a minimum)

if a < 0 then the parabola open downward (vertex is a maximum)

The equation of the axis of symmetry of a vertical parabola is equal to the x-coordinate of the vertex

so

x=h

In this problem we have

y=2(x-1)^{2}+8 -----> this is the equation in vertex form of a vertical parabola

The value of a=2

so

a>0 then the parabola open upward (vertex is a minimum)

The vertex is the point (1,8)

so

(h,k)=(1,8)

The equation of the axis of symmetry is x=1

The equation of a vertical parabola in standard form is equal to

y=ax^{2}+bx+c

Convert vertex form in standard form

y=2(x-1)^{2}+8

y=2(x^{2}-2x+1)+8

y=2x^{2}-4x+2+8

y=2x^{2}-4x+10

see the attached figure to better understand the problem

7 0
3 years ago
QUESTION 2 of 10: You take the bus to work and need to arrive by 9:00 AM. The trip takes 25 minutes. It takes you 10 minutes to
Anit [1.1K]

Answer:

8.20

Step-by-step explanation:

use your brain next time its realy easy or pay attantion to class

6 0
3 years ago
Read 2 more answers
Order these numbers from least to greatest.<br><br> 8.88, 8.8, 7.3962, 8.808
Wewaii [24]
7.3962, 8.8, 8.808, 8.88
8 0
3 years ago
Read 2 more answers
Other questions:
  • The whole is 8. One part is 8. What is the other part? Tell how you know.
    9·1 answer
  • 85 POINT QUESTION, WILL MARK BRAINLIEST.
    7·2 answers
  • Find the average rate of change over the given interval:<br><br> f(x) = 3^x, [1, 4]
    8·1 answer
  • Is 0.9 0.06 11/20 0.21 greater than 1/2 or smaller
    6·2 answers
  • 1 1/3÷3/5= whats the answer i need help
    5·1 answer
  • Let f(x) be a polynomial function such that f(−4)=−5,f′(−4)=0 and f′′(−4)=1. classify the point (−4,−5).
    7·1 answer
  • The Foot Locker is having a 60% off sale on shorts. John paid $18 for a pair of shorts. What was the original price of the short
    9·1 answer
  • What is the y- intercept of <br> y= 3 - 4x
    11·2 answers
  • 100 points please help
    5·2 answers
  • John grosses 38000 per year. What is his gross weekly wage? _ (round
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!