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2 years ago

What is each percent of change? Round to the nearest whole percent if

Mathematics

1 answer:

Kipish [7]2 years ago

3 0

Answer:

Its an increase

30 to 90

I= 100 x (f-i)/i

I= 100 x 90-30/30

I= 100 x 2

200% increase

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I do not understand this at all, can someone please help me with the steps in each question

Mandarinka [93]

Answer:

285 min

275 min

chi

tie

Step-by-step explanation:

swim - 1.5 km

bicycle ride - 40 km

run - 10 km

1) Alexandra

swim time = distance / velocity = 1.5 / 5 = 0.3 hr = 18 min

transition 1 time = 4 min

cycling time = distance / velocity = 40 / 15 = 2.6666667 hr = 160 min

transition 2 time = 3 min

run time = distance / velocity = 10 / 6 = 1.6666667 hr = 100 min

so total time to complete the triathlon is

= 18 + 4 +160 + 3 +100

= 285 min = 4.75 hrs

2) Chi

swim time = distance / velocity = 1.5 / 6 = 0.25 hr = 15 min

transition 1 time = 5 min

cycling time = distance / velocity = 40 / 15 = 2.6666667 hr = 160 min

transition 2 time = 5 min

run time = distance / velocity = 10 / 7.5 = 1.3333333 hr = 80 min

got flat tire that took 10 min to fix

so total time to complete the triathlon is

= 15 + 5 + 160 + 5 + 80 + 10

= 275 min

3) Alexandra won the race by 10 min

4)even though chi got flat tire , chi still won the race by 10 min,

if it took 20min to fix flat tire both their times would be 285 min and it would have been a tie.

6 0

3 years ago

What is the sum of the fractions below?<br> 1/7 + 3/8

Vesnalui [34]

Answer:

15/56

Step-by-step explanation:

4 0

3 years ago

Algebra question please helppp

mylen [45]

Step-by-step explanation:

if u need a clearer photo please tell me

5 0

2 years ago

There are 3 people at a party. If each person must shake hands with every other person at the party exactly once, how many hands

Dima020 [189]

<h2>Answer:</h2>

The total number of handshakes that would happen between the three people are:

<h2>Step-by-step explanation:</h2>

There are three people at a party.

Let they be denoted by A,B and C.

Now, the total number of handshakes that would occur will be denoted by:

AB, AC and BC

where AB denotes that A and B shake hands.

AC denote that A and C shake hands.

and BC denote that B and C shake hands.

Hence, total number of handshakes are:

5 0

3 years ago

Evaluate the following expression using the values given.

mel-nik [20]

Answer:

-19

Step-by-step explanation:

2×2-2z4+y2-x2+z4

now we put the value,

4-2(2to the power 4)+(3 to the power 2)-(-4 to the power 2)+(2 to the power 4)

4-2×16+9-16+16

4-32+9

4+9-32

13-32

-19

please check the answer again i am sorry if it's wrong

5 0

3 years ago