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Whitepunk [10]
2 years ago
7

Please help me! asap!

Mathematics
1 answer:
Nonamiya [84]2 years ago
7 0

Answer:

First option

Remove 2 tiles

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The Johnson twins were born nine years after their older sister. This year, the product of the three siblings ages is exactly 18
KATRIN_1 [288]

Answer: The age of the twins is 10 years.

Step-by-step explanation:

Suppose the age of older sister be x

Let the age of twins sister be x-9, as they are born after 9 years.

Product of their ages be

x(x-9)(x-9)\\\\=x(x^2-18x+81)\\\\=x^3-18x^2+81x

Sum of their ages will be

x+x-9+x-9\\\\=3x-18

According to question,

1861+3x-18=x^3-18x^2+81x\\\\x^3-18x^2+81x-3x+18-1861=0\\\\x^3-18x^2+78x-1843=0\\\\x=19

So, Age of older sister will be 19 years.

Age of the twins will be

19-9=10\ years

Hence, the age of the twins is 10 years.

3 0
3 years ago
In the regular pentagon below, if AP = 4 m and BC = 10 m, find it's area.
12345 [234]

First symmetrically cut the pentagon to get 5 pieces. (So that you will get the idea that this polygon is divided into 5 triangles)

Then find the area of one of the triangles:

Area of Triangle = \frac{1}{2} bh

A = \frac{1}{2} × 4 × 10

A = 20 m²

To find the area of the whole pentagon shape:

A = 20 × 5 = 100 m²

<em>Hope it helps!</em>

4 0
2 years ago
How to calculate the three averages for the given data?
vichka [17]

Answer:

Add the numbers together and divide by the number of numbers. (The sum of values divided by the number of values). Arrange the numbers in order, find the middle number. (The middle value when the values are ranked).

4 0
2 years ago
Sam is saving money to buy himself a new phone. He currently has $95. He is able to save about $20 a week. Let represent how muc
Sunny_sXe [5.5K]

Answer:

the correct answer is d

Step-by-step explanation:

w(s)=weeks saved and 20s is the gain of 20 dollars every week. and the 95 is the starting amount that sam had

4 0
2 years ago
1 ÷ 3 Express your answer as a fraction
Varvara68 [4.7K]

Answer:

1/3

Step-by-step explanation:

1 ÷ 3 = 1/3

1 divided by 3 is one-third, and one-third written as a fraction is 1/3.

7 0
3 years ago
Read 2 more answers
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