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
8090 [49]
4 years ago
10

Alex drove 135 miles in 3 hours at a constant speed

Mathematics
1 answer:
Dominik [7]4 years ago
7 0
Speed = distance / time
speed = 135/3 = 45 miles per hr <==
You might be interested in
Geometry help please
Nana76 [90]

Answer:

CED = 117

Step-by-step explanation:

21x +21 = 7x +49

21x - 7x = 49 - 21

14x = 28

x = 28/14

x = 2

7x + 49

=7(2) + 49

=14 + 49

=63

180 -63 = 117

CED= 117

8 0
3 years ago
Read 2 more answers
Can earn 5 coins
Aleonysh [2.5K]

Answer:4.14

Step-by-step explanation:

4 0
3 years ago
What is 5X minus Y equals 6+ negative 2X plus Y=8
vova2212 [387]

Answer:

For the given expression: X = (\frac{10}{3})  , Y =  (\frac{26}{3})

Step-by-step explanation:

Here, the given expression in statement form is given as:

5 X minus Y equals 6 + negative 2 X plus Y = 8

Now, converting the given statement mathematically, we get:

5X  - Y  = 6 + (-2X) + Y  = 8

Now, considering first  and the last  terms,we get:

5 X - Y  = 8  .... (1)

and , considering second and the last  terms,we get:

6 + (-2X) + Y  = 8 or, -2X  + Y  = 2  ......... (2)

Adding (1) and (2) , we get:

5 X - Y  - 2 X  + Y  = 8 + 2

or, 3 X =  10

or, X = 10/3  = 3.34

Now, 5X - Y = 8

or, 5(\frac{10}{3}) - Y = 8\\ \implies Y = \frac{50}{3} - 8  = \frac{50 - 24}{3}  = \frac{26}{3} \\\implies Y = \frac{26}{3}

Hence, for the given expression:

X = (\frac{10}{3})  , Y =  (\frac{26}{3})

3 0
3 years ago
There are two calculus classes at your school. Both classes have a class average of 75.5. The first class has a standard deviati
Korvikt [17]
To compare the two classes, the Coefficient of Variation (COV) can be used. The formula for COV is this:
C = s / x
where s is the standard deviation and x is the mean
For the first class:
C1 = 10.2 / 75.5
C1 = 0.1351 (13.51%)

For the second class:
C2 = 22.5 / 75.5
C2 = 0.2980 (29.80%)

The COV is a test of homogeneity. Looking at the values, the first class has more students having a grade closer to the average than the second class.
4 0
3 years ago
Please help me how to multiply
Travka [436]
Use:(a-b)^2=a^2-2ab+b^2\\-------------------------------\\\\(9-6i)^2=9^2-2\cdot9\cdot6i+(6i)^2=81-108i+36i^2\\\\=81-108i+36(-1)=81-108i-36=45-108i\\\\-------------------------------\\\\i=\sqrt{-1}\to i^2=1
7 0
3 years ago
Read 2 more answers
Other questions:
  • A pole that is 3.3 m tall casts a shadow that is 1.29 m long. At the same time, a nearby tower casts a shadow that is 36.75 m lo
    11·1 answer
  • What is the square root of 852
    9·2 answers
  • Whats is 20x6+2x0+1 ????
    14·2 answers
  • The probability of choosing a green grape out of the bag that contains red and green grapes without looking is StartFraction 11
    13·2 answers
  • The Roman cubitus is an ancient unit of measure equivalent to about 0.445 m. Convert the 2.00-m height of a basketball forward t
    5·1 answer
  • Help with the questions below!
    15·1 answer
  • Helpppppppppppp!!!!!!!!!
    12·1 answer
  • Please help, with a explanation too! :)
    12·1 answer
  • Use the reciprocal property to solve for x:
    7·1 answer
  • How do I find the difference -6 - (-9) <br> Pls explain how I can do negatives and positives numbers
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!