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ahrayia [7]
3 years ago
11

Some Native American tribes made jewelry with Dentalia shells. Each Dentalia shell is about 1.5 inches long. About how much long

er would a necklace made with 24 shells be than a necklace made with 18 shells? Use compatible numbers.
Mathematics
1 answer:
Flura [38]3 years ago
3 0

<u>Answer-</u>

<em>The necklace with 24 shells is longer than the necklace with 18 shells by 9 inches.</em>

<u>Solution-</u>

Length of each dentalia shell = 1.5 inches

Length of the necklace made with 24 shells = 24×1.5 = 36 inches

Length of the necklace made with 18 shells = 18×1.5 = 27 inches

The necklace with 24 shells is longer than the necklace with 18 shells by the amount of ,

= 36 - 27 = 9 inches

∴ The necklace with 24 shells is longer than the necklace with 18 shells by 9 inches.

( ∵ As the numbers are already rounded off or natural numbers, so we don't have to round them off or use the compatible numbers.)

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What is the length of BC¯¯¯¯¯ ? Enter your answer in the box. units Triangle A B C with horizontal side B C. Vertex A lies above
OlgaM077 [116]

Answer: The length of BC is 22 units.

Explanation:

It is given that the Triangle ABC with horizontal side BC. Vertex A lies above side BC. Angle B and angle C are marked congruent. The length of side AC is labeled as 2x-24. The length of side AB is labeled as x-2. The length of side B C is labeled as x.

If two angles of a triangle are same it means the triangle is an isosceles triangle.

Since the angle B and C are congruent therefore the lines AB and AC are same.

2x-24=x-2

2x-x=-2+24

x=22

Since the side BC=x therefore the measure of BC is 22 units.

7 0
3 years ago
Manuel is riding on a bike course that is 90 miles long. So far, he has ridden miles of the course. What percentage of the cours
garri49 [273]

Answer: 60% of the course

Step-by-step explanation:

54 equals ? of 90

54/90 = 0.6

0.6 = 60%

Manuel has ridden 60% of the course.

6 0
3 years ago
For three consecutive years, Sam invested some money at the start of the year. The first year, he invested x dollars. The second
wariber [46]
To answer we let x be the amount of money that Sam invested during the first year. 

Below are the expressions translated from the given word forms for the amount invested.

Sam:
2nd year :   amount = 5x/2 - 2000
3rd year  :   amount = x/5 + 1000

The sum of money invested by Sam is:
  x + (5x/2 - 2000) + (x/5 + 1000)

Similarly, we derive the expressions that we use for the amount that Sally invested.
Sally
1st year  :    amount  = 3x/2 - 1000
2nd year :    amount = 2x - 1500
3rd year :     amount = x/4 + 1400

The total amount that Sally invested is, 
        total = (3x/2 - 1000) + (2x - 1500) + (x/4 + 1400)

Equating the two equations:
 (x) + (5x/2 - 2000) + (x/5 + 1000) = (3x/2 - 1000) + (2x - 1500) + (x/4 + 1400)

 Solving for x,
               x = 2000
For Sally's investment in the third year:
    amount = x/4 + 1400 = (2000/4 + 1400) = 1900

ANSWERS: 
  Sam's first year = $2000
  Sally's third year = $1900
3 0
4 years ago
Sandra has 46 fewer coins than Martha. Sandra has 57 coins . how many coins does Martha have?
hoa [83]
M = 57+46
(Since she has 46 less then martha, you know to find how many martha has you have to add 46!)

M=103

So martha has 103 coins!
6 0
3 years ago
I need help finding the slope
Studentka2010 [4]

Answer:

its negative 1/3

Step-by-step explanation:

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8 0
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