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Dennis_Churaev [7]
3 years ago
7

Martin is taking a test at school. His teacher gave him 1 hour and 15 minutes to complete the test. He has been taking the test

for 54 minutes. How many minutes does Martin have left to finish the test? _______ minutes
Mathematics
2 answers:
Arisa [49]3 years ago
5 0

Answer:

21 seconds

Step-by-step explanation:

If an hour is 60 minutes, then we can subtract 54 from 60 and then add 15.

60-54=6

6+15=21.

Martin has 21 seconds left to finish his test.

Hope this helps!

Rainbow [258]3 years ago
4 0
He has 21 minutes left
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If an object is dropped from a height of 144 feet, the function h(t)=-16t^2+144 gives the height of the object after t seconds.
shtirl [24]

Answer:

A. 3s

Step-by-step explanation:

The height of the object after t seconds is given by:

h(t) = -16t^2 + 144

When will the object hit the ground?

It hits the ground after t seconds, and t is found when h(t) = 0. So

h(t) = -16t^2 + 144

0 = -16t^2 + 144

16t^2 = 144

t^2 = \frac{144}{16}

t^2 = 9

t = \sqrt{9}

t = 3

3 seconds, so the correct answer is given by option a.

5 0
2 years ago
How many terms are in the following sequence? 131072, ..., 8, 4, 2
Klio2033 [76]

Answer:

  17 terms

Step-by-step explanation:

131072 = 2^17

8 = 2^3

4 = 2^2

2 = 2^1

Apparently, the sequence is powers of 2 from 17 down to 1, so there are 17 terms in the sequence.

8 0
3 years ago
What is 243.875 rounded to the nearest tenth hundredth ten and hundred
DedPeter [7]
200.000 for the nearest tenth hundred and 243.900 for the nearest hundred
4 0
3 years ago
Read 2 more answers
A triangle has side lengths of 7 centimeters, 5 centimeters, and c centimeters.
storchak [24]
Sum of two sides always greater than the third side

If c is the smallest number, then

5 + c > 7
c > 2

If c is the largest number, then

5+7>c
12>c

Adding c>2 and 12>c, you get 12>c>2 for the answer
4 0
3 years ago
Read 2 more answers
the larger of two number is nine more than four times the smaller number. the sum of the two numbers is fifty-nine. find the two
VLD [36.1K]
This is solved by setting up two equations and then using one to answer the other.
The first step (use what is given to set up the two separate equations)
We are looking for two numbers, let us call them X and Y. 
We are told that X + Y = 59
 We are also told that (9 more than) 9+ (4times the smaller number) 4Y is the bigger number X
Then we combine that into 9+4Y=X
so we now have two separate equations and we can use one to solve the other. Everywhere we have X in the first equation, we will fill in with the second equation
(9+4Y) +Y = 59    [then combine like terms]
9+5Y=59            [subtract 9 from both sides]
5Y=50                   [divide both sides by 5 to isolate the Y]
Y=10                      [now plug this into either equation to solve for X]
9+4(10)=X
9+40=X
<u><em>49=X and 10=Y</em></u>
4 0
3 years ago
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