two speedboats leave the dock at the same time and travel in opposite directions. one travels 9 mi/hr faster than the other. After 2 hr the boats are 170 mi apart. How fast is each boat travelling ?

Answers

Answer 1

Answer: [tex]\frac{170}{X}[/tex]+[tex]\frac{170}{X-9}[/tex]=2

(=)17 0x +170x+1530=2x²+18x

(=)-2 x² +322x+1530=0

Δ=b²-4ac

Δ=115924

[tex]\sqrt{}[/tex]Δ=340,476>0

because Δ>0 so that 2 X

=>x₁=2 (true), x₂=-161(false)

X+9= 2+9=11

first travel 2 mi/hr

second travel 11 mi/hr

Step-by-step explanation:


Related Questions

Given the endpoint A(0, 13) and the midpoint M(6,5)
Find the other endpoint of AB. B(

Answers

Answer: (3, 9)

Step-by-step explanation:

X: Midpoint between 0 and 6

X: Midpoint between 1 and 5

X: Midpoint between 2 and 4

X: Midpoint is 3.

Y: Midpoint between 13 and 5.

Y: Midpoint between 12 and 6.

Y: Midpoint between 11 and 7.

Y: Midpoint between 10 and 8.

Y: Midpoint is 9.

NEED QUICK ASSIGNMENT IS OVERDUE

how many solutions do the following have? **NEED WORK SHOWN ON HOW TO SOLVE EACH ONE!!

6r + 7 = 13 + 7r
-14 + 6b + 7 – 2b = 1 + 5b
8x + 4(4x + 3) = 4(6x + 4) - 4

Answers

I gotchu :)

1) 6r + 7 = 13 + 7r    - Subtract 6r from both sides...

   7 = 13 + r       - Subtract 13 from both sides....

 r = -6   Check answer (don't need this part)

 6(-6) + 7 = 13 + 7(-6)

  -36 + 7 = 13 -42

   -29 = -29  ( It works )

2) -14 + 6b + 7 - 2b = 1 + 5b    - Combine like terms...

   -7 + 4b = 1 + 5b        - Add 7 to both sides....

    4b = 8 + 5b       - Subtract 5b from both sides....

     -b = 8            - Divide both sides by -1

      b = -8

3) 8x + 4(4x+3) = 4(6x + 4) - 4     - Distributive property

   8x + 16x + 12 = 24x + 16 - 4        Combine like terms

   24x + 12 = 24x + 12       - Both terms equal each other

    0 = 0

Since both terms equal each other, all numbres fit.

All real numbers

You don’t have to do all 4 but if you can do some that would be great.

Find the measure of the indicated angle that makes lines u and v parallel.

Answers

Answer:

13) ?=90°

14) ?=180°-48° (int angles, u//v)

=132°

15) ?=93° (alt angles, u//v)

16) ?=96° (alt angles, u//v)

Answer:

13: 90°

14: 132°

15: 87°

16: 84°

Step-by-step explanation:

Just subtract the value given from 180

Hope this helps!

in triangle abc are shown side ab is 8 and side ac is 4

Answers

Answer:

C

Step-by-step explanation:

Segment ad is 4 and ae is 2

Nine hundred sixty seven divided by four with remander

Answers

Answer:

240

Step-by-step explanation: If this helped pls give this Brainliest answer.

Answer:

967÷4= 241 r 3

Step-by-step explanation:

Solve for c. 2a + 3b = c

Please help as soon as possible. Thanks! =D

Answers

Answer:

a = c - 3b/2

Step-by-step explanation:

2a + 3b - 3b = c - 3b

2a = c - 3b

2a/2 = c/2 - 3b/2

therefore your answer is a = c - 3b/2

PLEASE HELP IF YOU KNOW THE ANSWER!!!
i need the domain and range

Answers

Answer:

domain: -1<x    range:y<-1

Step-by-step explanation:

seeing as how the x value seems to start at -1, but keeps going past that to the right, we can get the equation x>-1.  seeing as how the y value seems to start at -1, but keeps going down, we can get the equation y<-1.

cho A={0;2;4;6}. tập A có bao nhiêu tập con có 2 phần tử

Answers

Answer:

6

Step-by-step explanation:

{0; 2}

{0; 4}

{0; 6}

{2; 4}

{2; 6}

{4; 6}

triangle abc is dilated with a scale factor of 1/3 label the angle measurements in triangle abc

Answers

Answer:

B=1 and the rest Im unsure of sorry hope this helps

Step-by-step explanation:

Math help
Brainlest
Helpppppppp

Answers

Answer:

first one I think is 6 and then 3

Step-by-step explanation:

the movie theater offers a VIP member where you pay $75 for the VIP pass and then $4 per movie you see. People without the VIP pass that walk up to the movie theater pays $15 per movie they see

Answers

Answer:

so what are you trying to figure out

Step-by-step explanation:

3.3911649916 rounded to the nearest hundredth

Answers

The answer is 3.39

the hundredths place is 2 numbers after the decimal point
The answer is 3.39 because 1 doesn’t round up 9.

What is the missing angle measurement

Answers

Answer:

option c. 80 degree

Step-by-step explanation:

answer = 80 degree

what is the equation for the quadratic formula?

Answers

See picture! Hope this helps.

The highest temperature ever recorded in a particular city was 105°F, and the lowest was
- 27°F. Use absolute values to find the difference between the highest and the lowest
temperatures.

Answers

highest is 105F

the lowest is-27F

Help please slope-intercept intro

Answers

Answer:

(0, -2)

Step-by-step explanation:

y-intercept is the point at x = 0.

y = -3(0) - 2

y = -2

simplify this please!!​

Answers

Answer:

[tex] {5}^{ \frac{1}{2} } \times {5}^{ \frac{1}{3} } = {5}^{ \frac{5}{6} } [/tex]

what is the difference between a categorical and continuous variable?

Answers

Categorical- assigned to discrete categories
Continuous- can take any value in a range

What is the equation of the line that passes through the points (0, 5) and (0, 10)?

Answers

Answer:

x = 0

Step-by-step explanation:

The both points lie on the y-axis as both have same x- coordinate, zero.

The line overlaps with y- axis and its equation is:

x = 0

Find the measure of the missing angle.
а
24°

Answers

Since that is a right angle, it equals 90 degrees.

90 - 24 = 66

66 degrees...

I hope this helps..

Tonya's mom gave her $15.00 to spend on a Saturday outing with her friends. She spent $8.50 going to a movie. How much money does she have left to spend on lunch?​

Answers

Step-by-step explanation:

please mark me as brainlest

These triangles are similar. Find the missing
length.
h=

Answers

Answer:

Step-by-step explanation:

is 3/4 and 10/15 proportional

Answers

Answer:

3/4 and 10/15 are not proportional

Step-by-step explanation:

3 is not a factor of 10 and 4 is not a factor of 15

Answer:

No

Step-by-step explanation:

3/4 is already simplified all the way, but 10/15 is not. 10/15 simplifies down to 2/3 (because 5x2=10 and 5x3=15), which is not equivalent to 3/4.

(EASY) Is this an equilateral triangle?

Answers

Answer:yes

Step-by-step explanation

Answer:

NO

Step-by-step explanation:

This is an isosceles triangle. AC is longer than AB and BC.

A newborn baby has about 26,000,000,000 cells. An adult has about 4.94 x 10^*13 cells. How many times as
many cells does an adult have than a newborn? Enter your answer in scientific notation.
An adult has about =
times more cells than a newbom baby.

Answers

Answer:  1.9 × 10³

Step-by-step explanation:

New born = 2.6 × 10¹⁰ cells.

Adult         = 4.94 × 10¹³ cells.

How many times more = adult cells ÷ newborn cells

                                      = 4.94 × 10¹³ cells ÷ 2.6 × 10¹⁰ cells

                                      =  1.9 × 10³ cells

∴ adults have about 1.9 × 10³ more cells than newborn babies.

could anyone help me with this?

Answers

Answer:

ya

Step-by-step explanation:

.

what is If 1/2 a pound of walnuts cost $3.25. home much is one pound of walnuts?

Answers

Answer:

6.50

Step-by-step explanation:

just do 3.25 times 2 hope it helps

Your answer would be 6.50

WILL MARK BRAINLIEST!
Simplify -5a + a

Answers

Answer:

-5a+a

= -4a

Step-by-step explanation:

mark me brainlist

Select the equation which represents solving for the variable y.



−3x+3y=−21


y=x−7

y=x+7

y=3x−21

y=3x+21

Answers

Answer:

y = x-7

Thanks...........

Write the equation for a line parallel to y = -2x+2 through (0,5)

Answers

Answer:

y=-1x+2?

Step-by-step explanation:

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