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
Wittaler [7]
3 years ago
5

X =-12

Mathematics
1 answer:
faust18 [17]3 years ago
4 0

Answer:

9 km/h   …. Current rate

12 km/h   ….. still water boat rate

Step-by-step explanation:

The speed of the boat supposed to be x km/h

The current rate is y km/h

(x + Y) * 10 = 210

(x – y) * 70 = 210

x + y = 21 ….. ①

x –y = 3 ….. ②

①’- ②’ … 2y = 18

Y = 9 km/h   …. Current rate

X = 9 + 3= 12 km/h   ….. still water boat rate

You might be interested in
Point P is the center of dilation. Triangle S T U is dilated to create triangle S prime T prime U prime. The length of P T is 2.
Stels [109]

Answer:

A and D

Step-by-step explanation:

i took the quiz

6 0
3 years ago
Read 2 more answers
140 + (-122) + (-10), I also need it with work.
Aleks04 [339]

Answer:

8

Step-by-step explanation:

140-122=18

18-10=8

6 0
3 years ago
Read 2 more answers
Eben, an alien from the planet Tellurango, kicks a football from field level. The equation for the football’s height in meters,
Luden [163]

<span>The maxima of a differential equation can be obtained by getting the 1st derivate dx/dy and equating it to 0.</span>

<span>Given the equation h = - 2 t^2 + 12 t       , taking the 1st derivative result in:</span>

dh = - 4 t dt + 12 dt

<span>dh / dt = 0 = - 4 t + 12   calculating for t:</span>

t = -12 / - 4

t = 3 s

Therefore the maximum height obtained is calculated by plugging in the value of t in the given equation.

h = -2 (3)^2 + 12 (3)

h = 18 m

This problem can also be solved graphically by plotting t (x-axis) against h (y-axis). Then assigning values to t and calculate for h and plot it in the graph to see the point in which the peak is obtained. Therefore the answer to this is:

<span>The ball reaches a maximum height of 18 meters. The maximum of h(t) can be found both graphically or algebraically, and lies at (3,18). The x-coordinate, 3, is the time in seconds it takes the ball to reach maximum height, and the y-coordinate, 18, is the max height in meters.</span>

6 0
3 years ago
Will give brainlest!Solve the triangle, Round answers to the nearest tenth.
tensa zangetsu [6.8K]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Is there any integers between 0 and 1
Vikki [24]
An integer is a whole number...can be negative or positive.

There are no whole numbers between 0 and 1....so there are no integers between 0 and 1
5 0
3 years ago
Read 2 more answers
Other questions:
  • Ratios equivalent to 2:6.
    15·1 answer
  • The sum of the interior angles of a quadrilateral equals 360°.
    10·2 answers
  • A movie cost $3,254,107 to produce. What digit is in the hundred thousands place?
    15·1 answer
  • Explain how your knowledge of place value helps you divide a number in the thousands by whole numbers 10.Give an example to supp
    13·1 answer
  • Using the quadratic formula to solve x2 + 20 = 2x, what are
    9·1 answer
  • A shipping container in the shape of a right rectangular prism has a length of 16 feet, a width of 8 feet, and a height of 4.5 f
    11·2 answers
  • 2. What is the correct expanded form for the number 75.92?
    5·1 answer
  • Which expression is equivalent 3m+1-m? <br> 2+ m-1+m<br> 1+m<br> 3m-1<br> 3m
    7·1 answer
  • Which is the steepest and why? <br> a) slope=5/3<br> b) slope= -3/2<br> c) slope= 0
    15·1 answer
  • -4x - 8 = -(5x + 3) pleasee
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!