zaeemcgs
Answered

Westonci.ca is the Q&A platform that connects you with experts who provide accurate and detailed answers. Get detailed and accurate answers to your questions from a community of experts on our comprehensive Q&A platform. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

plz help me with this with steps

Plz Help Me With This With Steps class=
Plz Help Me With This With Steps class=

Sagot :

sqdancefan

Answer:

  a. 675

  b. 3

Step-by-step explanation:

a.

The number of consecutive numbers is ...

  N = L -F +1 = 38 -12 +1 = 27

Then the forumula tells you the sum of numbers from 12 to 38 is ...

  S = N/2(F +L) = 27/2(12 +38) = (27)(50)/2 = 575

The sum of the 27 consecutive numbers from 12 to 38 is 575.

__

b.

Solving the above formula for N so that it has F as the object, we get ...

  F = L +1 -N

Then the first number of 15 consecutive numbers ending in 17 is ...

  F = 17+1 -15 = 3

The first number is 3.

__

The sum of the numbers is S = (15/2)(3 +17) = 150, as given. This information is redundant (not needed in the solution process).

Thank you for choosing our service. We're dedicated to providing the best answers for all your questions. Visit us again. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. We're glad you chose Westonci.ca. Revisit us for updated answers from our knowledgeable team.