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Posted in Mathematics

A car travel 90 Km in 2 1/2 hours. How much time is required to cover 30 Km and find the distance cover in 2 hours


90:2 1/2
90/3 : (2 1/2)/3
30 : (2 1/2)/3
30 : (5/2)/(3/1)
30 : 5/2*1/3
30 : 5/6
30km in 50 mins

90 : 2 1/2
90/(2 1/2) : (2 1/2) / (2 1/2)
90/(2 1/2) : 1
(90/1)/(5/2) : 1
(90/1)*(2/5) : 1
180/5 :1
36:1
Multiply each side by 2:
72:2
72 km in 2 hours

Hope this helps :)


Related Questions

Posted in Mathematics

Find the multiplicative inverse of 6 + 2i.

The solution to the problem is as follows:

First thing to do is get rid of the i. Multiplying by 6 - 2i will do this 

( 6 + 2i)(6 - 2i) = 6^2 - (2i)^2 = 36 - 4(-1) = 36 + 4 = 40 

Dividing by 40 gets you 1 

(6 + 2i) (6-2i)/40 = 1 

The answer is (6 - 2i)/40 = (3 - i)/20

I hope my answer has come to your help. God bless and have a nice day ahead!

Posted in Mathematics

Which one is bigger 60% of 90 or 1/2 pa 100?

60% of 90 = 90 * 0.60 = 54
1/2 of 100 = 100/2 = 50

So, as 54 > 50, 60% of 90 > 1/2 of 100

So, your answer is 60% of 90 is bigger!

Hope this helps!

Posted in Mathematics

What is 20 time 4 equal?

20 x 4 = 80

hope this helps you

Posted in Mathematics

What is 1 1/2 plus 2/3?

It would be 1 7/6 which can be simplified to 2 1/6

hope this helps you

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Posted in Mathematics

The price of a cup of coffee was $2.65 yesterday. today, the price fell to $2.50 . find the percentage decrease. round your answer to the nearest tenth of a percent.

We must find the difference between prices. $2.65 - $2.50 = $0.15. Now we need to calculate what percent $0.15 is of $2.65. It is 5.7%! The price decreased, so it is a 5.7% decrease!

Posted in Mathematics

Ava was making muffins. she used 1 1/3 tsp of cinnamon and 1/2 tsp of nutmeg. how many teaspoons of spice did ava use?

1 5/6 


1 1/3 = 4/3 (1x3+1)
4/3 and 1/2 do not have the same denominator so you'd have to find the lowest common denominator, which is 6. the new fractions would be 8/6 and 3/6 which would equal 11/6 or 1 5/6!

Hope that helps!

Posted in Mathematics

Amy wants to run the 26 miles of the marathon in 4.5 hours. at what rate will she have to run to reach thisbgoal??

The answer is:
____________________________
5.778 mi/ h;
   → or;  write as:  5 ⁷/₉ mph {"miles per hour"}.
______________________________________
Explanation:
_____________________________________

We shall solve in miles ("mi.") per hour ("h");  denoted as "mi / h" ; or sometimes, "mph".
______________________________________

Given 26 mi / 4.5 h ; we want to solve for the number of miles (mi) per unit hour (h),
________________________________
The answer is (26/ 4.5) mi / h l 
______________________________
26 ÷ 4.5 = 5.7777777777777778→       Round to:  5.778 mi/ h;
                                                                → or;  write as:  5  ⁷/₉ mi /h
_____________________________________________________

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Posted in Mathematics

6 times the square root of 2.25 and then minis 4.23 =

The answer is: 4.77.
________________

6√(2.25)  - 4.23 = ?
__________________
6√(2.25)  - 4.23 = 
______________________
6*(1.5)  - 4.23 = 
_______________
9 - 4.23 =
_______________
4.77

Posted in Mathematics

6 1/2 as an improper fraction

6 1/2 as an improper fraction is 13/2

Posted in Mathematics

If the purchase price for a house is $445,500, what is the monthly payment if you put 5% down for a 30 year loan with a fixed rate of 6.25%?

Answer:

The monthly payment is $2603.17

Step-by-step explanation:

The purchase price is = $445500

5% is down payment = 0.05\times445500=22275

Loan amount is = 445500-22275=423225

The EMI formula is = \frac{p*r*(1+r)^{n} }{(1+r)^{n}-1 }

p = 423225

r = 6.25/12/100=0.0052

n = 30*12 = 360

Putting the values in the formula we get:

\frac{423225*0.0052*(1.0052)^{360} }{(1.0052)^{360}-1 }

= $2603.17

The monthly payment is $2603.17 approx

Posted in Mathematics

What times what equals 429

20.71 * 20.71 = 429

Your answer is 20.71
If you want more than it is 20.71231517

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Posted in Mathematics

Sophia is saving money for a new bicycle. The bicycle will cost at least $623. Sophia makes $8.22 per hour. Which inequality could be used find the number of hours Sophia needs to work to make enough money to buy a new bicycle? $8.22h > $623 $8.22h ≤ $623 $8.22h ≥ $623 $8.22h < $623

Answer:

C.8.22 h\geq$ 623

Step-by-step explanation:

We are given that Sophia is saving money for a new bicycle.

The bicycle will  cost atleast $623.

Sophia makes $8.22 per hour.

We have to find the inequality that could be used to find the number of hours Sophia needs to work to make enough money to buy a new bicycle.

Let Sophia works h hours to make enough money to buy a new bicycle.

Sophia makes money per hour =$8.22

Total money made by Sophia in h hours =8.22 h

According to question

8.22 h\geq $623

Hence, option C is true.

Posted in Mathematics

Is 30y^2 a polynomial?

No. polynomials are expressions that have two or more terms in them. 30y² is a single term, or a monomial. the prefix poly- means many and the prefix mono- means one, for future reference.

Posted in Mathematics

12 meters into centimeters

We Know, 1 m = 100 cm
hen, 12 m = 100 * 12 = 1200 cm

So, your final answer is 1200 cm

Hope this helps!

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Posted in Mathematics

Which expression represents the sum of 2/3m - 1 1/6 and 5/6 - 1 1/3?a. 1 1/2m + 2 1/2b.1/6m - 1/3c.1 1/2m - 2 1/2d.1/6m + 1/3

The answer to "which expression represents the sum of 2/3m - 1 1/6 and 5/6 - 1 1/3?a. 1 1/2m + 2 1/2b.1/6m - 1/3c.1 1/2m - 2 1/2d.1/6m + 1/3" is B.

Posted in Mathematics

Find the value of 3x + 2 when 7+ x = 5

I hope this helps you




x= 5-7


x= -2


3.(-2)+2


-6+2


-4

Posted in Mathematics

Find all the zeros of the function y=x^3+6x^2+x+6

Y=X^3+6x^2+X+6 that is your answer
one more thing X= not real solution

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Posted in Mathematics

How can you solve 0.01×30

You can just do 1x30 which equals 30

Posted in Mathematics

Steven earns money babysitting. He charges 31.25 for 5 hours and 50 for 8 hours explain what the constant rate of change means I this coming tent

31.25/5=50/8. Divide 31.25 by 5 you get 6.25. Divide 50 by 8 you get 6.25. The constant ratio is: 6.25=6.25 :)

Posted in Mathematics

Write two equivalent fractions for each. 1/2 and 4/5

An equivalent fraction for 1/2 would be 2/4. This is because you can simplify 2/4 by dividing it by 2. The final answer would be 1/2.

An equivalent fraction for 4/5 would be 8/10. It's basically the same thing. Divide them both by 2 and you'll get 4/5 since 8 divided by 2 is 4, and 10 divided by 2 is 5.

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