1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nimfa-mama [501]
3 years ago
5

A collection of dimes is arranged in a triangular array with 17 coins in the base row, 16 in the next, 15 in the next, and so fo

rth. Find the value of the collection.
Mathematics
1 answer:
Crazy boy [7]3 years ago
7 0

Answer:

153 coins will be there.

Step-by-step explanation:

The number of coin in the bottom row / or last row = 17

The number of coins in the second last row = 16

|

|

|

|

The number of coins in the second row = 2

The number of coins in the first row = 1

So the total number of coins = (Number of coin in the first row) + (Number of coins in the second row) + (Number of coins in the third row) + ....... + (Number of coins in the last row / seventeenth row)

Total number of coins = 1+2+3+....+16+17

Total number of coins = \frac{17\times(17+1)}{2}=\frac{17\times18}{2}=17\times9=153

(NOTE: Sum of first n natural number = \frac{\boldmath n\times(n+1)}{2})

You might be interested in
Express each ratio as a fraction in lowest terms.
uranmaximum [27]
1. 5/6
2. 7/1
3. 1/7
Just write the first number as the numerator and the second one as a denominator then divide by their common factors
6 0
3 years ago
In the given diagram, which of the following pairs of angles are alternate interior angles?
castortr0y [4]

Answer:

3 and 6

4 and 5

Step-by-step explanation:

Alternate interior angles are on the opposite sides of the transversal, t, and between the parallel lines, r and s

3 and 6 are alternate interior angles

4 and 5 are alternate interior angles

3 0
2 years ago
Read 2 more answers
Pls help me guys, I’d really appreciate it
trapecia [35]

Answer:

∠ PQR = 70°

Step-by-step explanation:

The tangent- tangent angle PQR is half the difference of the intercepted arcs.

minor arc PR = 360° - 250° = 110°

Then

∠ PQR = \frac{1}{2} (250 - 110)° = \frac{1}{2} × 140° = 70°

8 0
3 years ago
What is the voume of depth 1 2/3 inches and length of 2 1/3 inches and width 2 inches
Vlad [161]

Answer:

20/9 or 2 2/9 or 2.2 repeating

Step-by-step explanation:

7 0
2 years ago
The area of a rectangle is represented by x^2- 7x + 10. What are the missing side lengths of the rectangle?
ladessa [460]
Length = x - 2
Width = x - 5

Explanation:

Area = x^2 - 7x + 10
Area = (x - 2)(x - 5)
Area = Length x Width

Length = x - 2
Width = x - 5
4 0
3 years ago
Other questions:
  • If the endpoints of the diameter of a circle are (−10, −8) and (−6, −2), what is the standard form equation of the circle?
    9·2 answers
  • Can someone explain to me how to change a fraction to a decimal example: 4 over 5
    14·2 answers
  • Hi everyone I really need help on number 33 and 34 I would really appreciate it
    9·1 answer
  • An athlete runs around a circular track. The track has a diameter of 200 feet. How many laps does she need to take to run a mile
    12·1 answer
  • Solve for u . = 81/u=3
    6·2 answers
  • Help please. I have most of the problem done.
    8·1 answer
  • Which sequence is ARITHMETIC?
    12·2 answers
  • Multiplication property of equality: If AB = CD, then 5 • AB =
    12·1 answer
  • What are punctuation marks used to set off words that define or explain another word?
    7·1 answer
  • Please help me Asp please really fast
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!