MATHEMATICS HIGH SCHOOL

mike drove to a frineds house at the rage of 40 mph. he returned hoke by the dsne route at 45 mph the driving time for the round trip was four hours how long did it take mike to get home

Answers

Answer 1

Answer:

Let the distance be x miles

Time = Distance / speed

Time taken by Mike to go to his friend's house = x / 40 hours

Time taken by him to return = x / 45 hours

Total time = x / 40 + x / 45 = 4 hours

= 9x + 8x = 1440 miles

17x = 1440

= x = 1440 ÷ 7

= x = 84.706

Time taken to return home = 84.706 /45= 1.882 hours .

Therefore , Mike took1.882hoursto reach home .

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400,000,000,000 + 90,000,000,000 + 6,000,000,000 + 600,000,000 + 60,000,000 + 300,000 + 40,000 + 2,000 + 800 + 10 + 1 Write the standard form of the number shown above.

Answers

Answer:

Standard form = 496,660,342,811.

Step-by-step explanation:

Standard form is a way of writing down very large or very small numbers easily.

To convert small normal numbers into standard form.
Find the first non 0 digit after the decimal point.
After this digit, place your new decimal point ignoring everything that is in front of this digit.

General form:

400,000,000,000 + 90,000,000,000 + 6,000,000,000 + 600,000,000 + 60,000,000 + 300,000 + 40,000 + 2,000 + 800 + 10 + 1

Standard form:

Ans = 496,660,342,811.

i think it's 4.96x10^11
if you input into a calculator and count the decimal from the end to the left it should give you your answer
p.s. that was a bad explanation, im sorry

Oil consumption is increasing at a rate of 1.8% per year. by what factor will oil consumption increase inn 6 years? Use the approximate doubling time formula (rule of 70)

Answers

$(70)/(1,8) \approx 38.8 \ \ \ \ \ \rightarrow \ the \ amount \ of \ time \ to \ double \ the \ consumption \n \n 38,8 - 100\% \n 6 - x \n 38,8 x = 600\% \nx \approx 15.5\% \n \n In \ six \ years \ oil \ consumption \ will \ increase \ by \ approximately \ 15.5\%$

Answertion:100 it is

How do you factor x squared plus 3x

Answers

$x^2 + 3x = x (x+3)$

factor the x out and you have x (x+3)

Yall pls answer this i will give brainliest and 10 points how about 20

Answers

Answer:

i cant see the picture

Step-by-step explanation:

Answer:

1 goes to 3a ,4 goes to 2b 3 goes to 4c and I can't see the rest

Step-by-step explanation:

I dont know I'm probably wrong tho

What is the perimeter of abc with vertices A(-2,9) B(7,-3) and C(-2,-3) in coordinate plane

Answers

For the answer to the question above,
A - C = ( -2, 9) - (- 2 -3)

= ( 0, 12)

AC = 12

B - C = (7 - 3) - ( - 2 -3)

= (9, 0)

BC = 9

ABC is a right -angled triangle with AC as the hypotenuse

AC = sqrt( 9^2 + 12^2)

= sqrt(81 + 144)

= srqt(225)

= 15

Perimeter = 12 + 9 + 15

= 36 units

So the answer is 36 units
I hope my answer helped you.

Answer:

36units

Step-by-step explanation:

yeah thatss right

Find the lateral area the regular pyramid.

L. A. =