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
Rudiy27
2 years ago
12

two speedboats leave the dock at the same time and travel in opposite directions. one travels 9 mi/hr faster than the other. Aft

er 2 hr the boats are 170 mi apart. How fast is each boat travelling ?
Mathematics
1 answer:
Likurg_2 [28]2 years ago
6 0

Answer: \frac{170}{X}+\frac{170}{X-9}=2

(=)17 0x +170x+1530=2x²+18x

(=)-2 x² +322x+1530=0

Δ=b²-4ac

Δ=115924

\sqrt{}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:

You might be interested in
PLS ANSWER 34 and 35 WILL MARK BRAINLEST IF CORRCET PLS ANSWER
sesenic [268]

Answer:

34 is 20

35 is 82

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
1st. (2 root 2 + root 3 ) ( 2 root 3 - root 2)
satela [25.4K]

Answer:

1st: 3*root6 + 5

2nd: 35*root2 + 115

3rd: 24*root2 - 20*root6 + 15*root3 - 18

4th: 17*root6 - 38

5th: 13*root10 - 42

Step-by-step explanation:

To simplify these expressions we need to use the distributive property:

(a + b) * (c + d) = ac + ad + bc + bd

So simplifying each expression, we have:

1st.

(2 root 2 + root 3 ) ( 2 root 3 - root 2)

= 4*root6 - 2*2 + 2*3 - root6

= 3*root6 - 4 + 9

= 3*root6 + 5

2nd.

(root 5 + 2 root 10) (3 root 5 + root 10)

= 3 * 5 + root50 + 6*root50 + 2*10

= 15 + 5*root2 + 30*root2 + 100

= 35*root2 + 115

3rd.

(4 root 6 - 3 root 3) (2 root 3 - 5)

= 8*root18 - 20*root6 - 6*3 + 15root3

= 24*root2 - 20*root6 + 15*root3 - 18

4rd.

(6 root 3 - 5 root 2 ) (2 root 2 - root 3)

= 12*root6 - 6*3 - 10*2 + 5*root6

= 17*root6 - 18 - 20

= 17*root6 - 38

5th.

(root 10 - 3 ) ( 4 - 3 root 10)

= 4*root10 - 3*10 - 12 + 9*root10

= 13*root10 - 30 - 12

= 13*root10 - 42

8 0
3 years ago
What is the absolute value of 6.7
Aleonysh [2.5K]
The absolute value of 6.7 is 6.7
6 0
3 years ago
Read 2 more answers
Which function has the domain x>or= -11
iogann1982 [59]
I'm assuming this is multiple choice and you forgot to post the answers. I'll take a guess and say it probably looks something like this:
y = \sqrt{x + 11}
Because you can't take the square root of a negative number without getting an imaginary result, resulting in the function having a closed domain limit.
6 0
3 years ago
Help me to get this ASAP
torisob [31]

Answer:

top left:1/5, 2/7, 3/5, 5/7, 31/35

top right:2/5, 2/3, 7/10, 4/5, 9/10

bottom left:9/8, 15/8, 13/6, 9/4, 15/6

bottom right:13/10, 13/6, 11/5, 25/6, 21/5

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Use properties of addition and subtraction to evaluate the expression. -19 - 53 - 31 Enter your answer in the box.
    7·2 answers
  • What is r = 14 ft ? I don't get it, can you please explain it
    7·1 answer
  • 2 Emma buys 33 yards of blue fabric and some yellow fabric at a store. She buys a total of 53 yards of fabric. The equation 1 2
    5·1 answer
  • An initial population of 7 chipmunks increases by 6% each year. If the function f(x) = ab^x models this situation, which functio
    10·1 answer
  • Which relationships describe the angle pair x° and 157º?
    12·1 answer
  • A fraction is shown. 6/18 Which expression is equivalent to this fraction?
    13·1 answer
  • Three times the sum of a number and seven,all divided by four
    7·1 answer
  • Solve: 2x ≤ -2/3 (4x + 4)
    10·2 answers
  • I need a lot of help
    15·2 answers
  • I need help :) pleaseeeeeeeeeeeeeee
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!