MATHEMATICS HIGH SCHOOL

Convert the following 4.5 hours Into Second- ( Soin 24​

Answers

Answer 1
Answer:

Answer: 16,200 Seconds

Step-by-step explanation:

Data: 4.5 hours(h)=x seconds(s)

Step One, Convert Hours Into Minutes

4.5h=4h and 30 minutes(m)

1h=60mx4=240m+30=270m

Reason: Since to convert to seconds, minutes are needed, you have to convert everything to minutes. And with 60 minutes in an hour you have to multiply 60 by 4 to get 240 and add 30 minutes to it(since it's 4.5 hours) to find ourselves at 270 minutes.

Step two, Convert Minutes Into Seconds

1m=60s

270mx60=16,200s

Reason: Since we are ultimately trying to get 4.5 hours into seconds, we have to convert the minutes we have into seconds by multiplying 270 minutes by 60(since 60 seconds are in a minute) to get our final answer of 16,200 seconds.

I hope this helps!

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HELP PLEASE I WILL GIVE BRAINLY TO CORRECT ANSWER PLS.2 The graphs of y = 3x + 7x – 4 and y + 2x = 10 intersect at the points A and B.
Find the coordinates of A and B.
You must show all your working and give your answers correct to two decimal places.

Answers

Answer:

Check the text of the exercise, there is something wrong

Step-by-step explanation:

y=10x-4

y=-2x+10

These are two stright lines, they meet in one point only, P(7/6, 23/3)

The blue lake trail is 11 3/8 miles long. Gemma has hiked 2 1/2 miles each hour for 3 hours. How far is she from the end of the trail?

Answers

In the question it is given that the length of the blue lake trail is 11 3/8 miles. In the question it is also given that Gemma has hiked for a total time of 3 hours and each hour she has hiked 2 1/2 miles.
Now coming to solving the problem we get:
Total length of blue lake trail = 11 3/8 miles
                                             = 91/8 miles
Distance hiked by Gemma in 1 hour = 2 1/2 miles
                                                           = 5/2 miles
Then the total distance hiked by Gemma in 3 hours = (5/2) * 3
                                                                                   = 15/2 miles
The distance left to cover the full trail = (91/8) - (15/2) miles
                                                            = (91 - 60)/8 miles
                                                             = 31/8 miles
                                                             = 3 7/8 miles.
So Gemma is 31/8 miles or 3 7/8 miles from the end of the trail.

What multiplies to -900 and adds to 5?

Answers

xy = -900
x + y = 5

     x + y = 5
x - x + y = -x + 5
           y = -x + 5

                                                xy = -900
                                      x(-x + 5) = -900
                                  x(-x) + x(5) = -900
                                       -x² + 5x = -900
                             -x² + 5x + 900 = 0
               -1(x²) - 1(-5x) - 1(-900) = 0
                          -1(x² - 5x - 900) = 0
                                       -1            -1
                               x² - 5x - 900 = 0
                               x = -(-5) ± √((-5)² - 4(1)(-900))
                                                      2(1)
                               x = 5 ± √(25 + 3600)
                                                  2
                               x = 5 ± √(3625)
                                             2
                               x = 5 ± 5√(145)
                                           2
                               x = 2.5 ± 2.5√(145)

                          x + y = 5
   2.5 ± 2.5 √(145) + y = 5
- (2.5 ± 2.5√(145)       - (2.5 ± 2.5√(145)
                                y = 2.5 ± 2.5√(145)
                          (x, y) = (2.5 ± 2.5√(145), 2.5 ± 2.5√(145))

The two numbers that add up to 5 and multiply to -900 are 2.5 ± 2.5√(145).

How do you write fourteen and seven tenths squared in all three forms?

Answers

The 3 forms of expressing fourteen and seven tenths squared are;

(14⁷/₁₀)²; (147/10)²; (14.7)²

How to express fractions in decimal form

We want to express 14 and 7/10 all squared in all three forms.

The first form is in mixed fraction which is;

(14⁷/₁₀)²

Second form is in improper fraction form which is;

(147/10)²

Third form is in decimal form which is; (14.7)²

Read more about fractions to decimal form at; brainly.com/question/293712
14.7 squared
14 7/10 squared
14.7 × 14.7

If someone has 30 books to pack in each box and each box only hold 7 books how many books are left

Answers

Answer:

you have two books left over

Step-by-step explanation:

if you divide 30 by 7 you will get 4.2

that hows you have four boxes

to check yourself you can times 7 by 4 which will give you 28 and that shows you have two that wont fit

Find the outlier in the set of data.17, 13, 16, 18, 38, 14, 21, 24, ____, 38
14
16
17

Answers

An outlier is a data point that is unlike any of the ones around it. Therefore, the outlier in this case is 38.

Answer:

38

Step-by-step explanation:

The outlier of the data set is defined as the data point which lies outside the overall given data set.

Now, the given set is:

17, 13, 16, 18, 38, 14, 21, 24, 38, 14, 16, 17

Now, we can see from the given set that 38 lies outside overall given data set, therefore according to the definition of an outlier, 38 is an outlier.
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