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
madreJ [45]
3 years ago
10

if you drive to your spring break destination at a steady 60 miles per hour and Return at a steady 40 miles per hour what is you

r average speed for the round trip?
Mathematics
1 answer:
NemiM [27]3 years ago
4 0
D = distance to & from spring break destination

t1 = d/60 = time to get there

t2 = d/40 = time to get back

avg speed = (total distance)/(total time)

= 2d/(d/60+d/40)

Divide numerator and denominator by d:

= (2/(1/60 + 1/40))

Multiply numerator and denominator by 120:

= 240/(2 + 3)

= 240/5

= 480/10

= 48 mi/hr is the average speed round trip.
Trentt31
You might be interested in
14) Simplify: -(16 - 5x) A) 5x - 16 B) 5x + 16 C) -5x - 16 D) - 5x + 16
VLD [36.1K]

Answer: 5x-16

<u>Switch operations</u>

Before: -(16 - 5x)

After: 5x-16

Before you switch operation you remove the subtraction sign where -(16) is.

5 0
3 years ago
In an experiment you do a chi-square test comparing observed and expected progeny. Your calculated chi square is 0.375. With 1 d
myrzilka [38]

Answer:

It mean that the observed progeny is similar than the expected progeny. There is no a relationship between the categorical variables.

Step-by-step explanation:

The Chi-squared test is used to test the relationship between categorical variables. A categorical variable is a non-numerical variable. The null hypothesis of the Chi-squared test is that categorical variables are independent; it means that the frequencies are not dependent on the variable. It is important to know that the Chi-squared test does not measure causality, it only measures the relationship. To reject the null hypothesis, you usually need a probability lower than 0.05, but in this case, the probability was way higher than 0.05, it was between 0.5 and 0.9.

4 0
3 years ago
∠rst and ∠vst are a linear pair, m∠rst = 3x 7, and m∠vst = 9x 17. what are the measures of m∠rst and m∠vst?a.46, 134b.26, 154c.5
sergij07 [2.7K]
M∠ rst + m∠ vst = 180°
3 x + 7° + 9 x + 17° = 180°
12 x + 24° = 180°
12 x= 180° - 24°
12 x = 156°
x = 156° : 12
x = 13°
m ∠ rst = 3 · 13° + 7° = 39° + 7° = 46°
m ∠ vst = 180° - 46° = 134°
Answer:
A ) 46° and 134° 
6 0
3 years ago
Perform the indicated operation. (-18)/-(4)
Illusion [34]
A negative divided by a negative is always a positive. 4 can go into 18 only 4 times to get 16 with a remainder of 2. 2 is half of four, therefore -4 can go into -18 4.5 times. 
The answer is 4 1/2 or 4.5.
I hope this helps ^-^
7 0
3 years ago
On a coordinate grid, 1 square unit equals 14 square mile. A rectangular walking path has vertices at (−4, 5) (1, 5), (−4, -5) a
AfilCa [17]

Answer:

126 square miles

Step-by-step explanation:

So I just draw a grid and mark the thingies (sorry my math vocabulary is not very good)

So you get a rectangle that is 5x9 if you connect the dot thingies and 9 square units is 14 square miles and 9x14=126. Using a coordinate grid makes it easier to visualize what you’re doing

7 0
2 years ago
Read 2 more answers
Other questions:
  • Hi everyone I needs ton of help!
    12·2 answers
  • What is the answer for this answer 4 × (8 – 3) = (4 × 8) – ( × 3)
    9·1 answer
  • Please HELP ASAP<br> question is in the photo below
    6·1 answer
  • 8.032×10^-4 in standard form​
    9·2 answers
  • Which of the following describes how to translate the graph y = lxl to obtain the graph of y = lx + 1l + 1?
    9·1 answer
  • I need answers anyone help
    6·1 answer
  • Frances owns a landscaping business. She has 425 plants and is placing an equal number of plant into 47 yards. After planting, h
    7·1 answer
  • HELP PLZZZS!!!!!!! EASY 10 points *easy*
    14·2 answers
  • X^3+y^3=???????????????
    15·1 answer
  • PLZ HELP!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!