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
vodomira [7]
3 years ago
12

An aircraft flying at an average speed of 770 km/h takes 15 hours to complete a journey. Find the time taken for the aircraft to

complete at same journey if it's average speed is 660 km/h
Mathematics
2 answers:
Hoochie [10]3 years ago
8 0
We can solve it two ways, we´ll do it via physics:
We know that:
d=vt
d=770km/h*15h
d=11550km
Now at 660km/h:
t=d/v
t=11550km/660km/h
t=17,5h
Math way:
770km/h→15h
660km/h→x
So:
(770*15)/660=x
x=17,5h
inessss [21]3 years ago
4 0
Seventeen hours and fifteen minutes
You might be interested in
I do not know this answer
nexus9112 [7]
The answer is (3, -5)
3 0
2 years ago
Read 2 more answers
How do you solve 38.2 X 10^-2 ?
Jet001 [13]
Since its to the tenth power and the exponent is negative all you have to do is move the decimal point two positions back and your new answer is 0.382
3 0
3 years ago
Evaluate the expression below when y = -3.
Rudik [331]
Start with the given equation:
2y+7
Substitute known values:
2(-3)+7
Evaluate:
-6+7=1


Similarly:
-4y-10
-4(-3)-10
12-10=2
8 0
3 years ago
Read 2 more answers
Write two monomials with a product of -84a^6b^10
rjkz [21]
(-2a^5b^4) * (42ab^6) = -84a^6b^10
5 0
3 years ago
Read 2 more answers
88 POINTS!!!!! Multiply:<br><br> 1. (y−4)2<br><br> 2. 5(y+4)2<br><br> 3. (y+4)2<br><br> 4. 5(y−4)2
navik [9.2K]

Answer:

Thus # 2 is correct (5 (y + 4))/2

Step-by-step explanation:

Simplify the following:

(5 y (y^2 - 16))/(2 y (y - 4))

(5 y (y^2 - 16))/(2 y (y - 4)) = y/y×(5 (y^2 - 16))/(2 (y - 4)) = (5 (y^2 - 16))/(2 (y - 4)):

(5 (y^2 - 16))/(2 (y - 4))

y^2 - 16 = y^2 - 4^2:

(5 (y^2 - 4^2))/(2 (y - 4))

Factor the difference of two squares. y^2 - 4^2 = (y - 4) (y + 4):

(5 (y - 4) (y + 4))/(2 (y - 4))

Cancel terms. (5 (y - 4) (y + 4))/(2 (y - 4)) = (5 (y + 4))/2:

Answer:  (5 (y + 4))/2

7 0
3 years ago
Read 2 more answers
Other questions:
  • PLZ ANSWER THIS IS FOR AN IMPORTANT TEST
    9·2 answers
  • Thanks for your answer.
    10·2 answers
  • How do you write fourteen and seven-tenths squared in all three froms
    10·1 answer
  • How to write out 314,207
    13·2 answers
  • 2900 dollars is placed in an account with an annual interest rate of 9% Wirte an equation that calculates how many dollars will
    6·1 answer
  • Simplify 4−3y+​(−7y​)+7.2.
    14·1 answer
  • Two numbers are in the ratio 3:7
    10·1 answer
  • Can i get help...plzzz
    15·2 answers
  • One way to prove that a quadrilateral is a parallelogram is to show that
    12·1 answer
  • What’s 2 + 2? <br> A. 0<br> B. 1<br> C. 2<br> D. 4
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!