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ruslelena [56]
3 years ago
10

Rogerio drives 1 hour and 18 min to meet a friend. the first 30 min of his trip was mostly highway driving, so he averaged 64 mi

les per hour for this portion. for the last 48 min of this trip, he averaged 50 miles per hour. what was his average speed for the entire trip?
A) 60 miles per hour
B) 58 miles per hour
C) 55 miles per hour
D) 53 miles per hour
Mathematics
2 answers:
Setler79 [48]3 years ago
7 0

Answer:

Step-by-step explanation:

d

math sucks

AlladinOne [14]3 years ago
7 0

Answer:

C) 55 miles per hour

Step-by-step explanation:

In order to calculate this you just have to see how many miles did he traveled and then divided that by the minutes that he spent.

So in the first part of the trip he traveled 30 minutes at a speed of 64 miles, that makes up for 32 miles.

And in the second part of the trip he traveled for 48 minutes at 50 miles per hour, that makes for 40 miles

So he traveled 72 miles total, divided by 78 minutes=.923 miles per minute, we just multiply this by 60 and we have that he traveled at 55.38 miles per hour.

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Lisa bucket weighs 21kg after pouring out half it weigh 12kg what’s the wight of the bucket?
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3 years ago
A jewelry maker has 24 jade beads and 30 teak beads. What the the greatest number of necklaces she can make? How many beads of e
Darya [45]
Find the GCF of 24 and 30

  24                30
1×24              1×30
2×12             2×15
3×8               3×10
4×6               5×6

The common factors are 1, 2, 3, and 6

That means we can make 6 necklaces, each necklace with 4 jade beads and 5 teak beads. 

8 0
3 years ago
Read 2 more answers
WHAT IS THE RATE OF CHANGE FOR THIS
stealth61 [152]
Well first find 2 points, I am going to choose (0,0.5) and (1,0.3). So to find rate of change or Slope it is y2-y1/x2-x1 so we are doing that, .3-.5/1-0. which will be -.2/1

Your answer: -.2/1
4 0
3 years ago
Martin says that f(x)=2(4)^x starts at 4 and has a constant ratio of 2. What error did Martin make? Explain.
grigory [225]

Answer:

A general exponential equation is written as:

f(x) = A*(r)^x

Where:

A is the initial value, this is the value that the function takes when x = 0.

r is the rate of growth

x is the variable.

In this case, the function is:

f(x) = 2*(4)^x

The initial value is:

f(0) = 2*(4)^0 = 2*1 = 2

The initial value is 2.

And the rate of growth is 4.

So Martin seems to mixed these two values (he said initial value = 4, and rate  = 2, which is the opposite of what we found)

8 0
3 years ago
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