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Ainat [17]
3 years ago
8

How many toothpicks are needed to build the tree on day 100?​

Mathematics
2 answers:
Masja [62]3 years ago
8 0

Answer:

100= 4 + 3 (100-1)

4+3 (99)

4 + 297 is 301

Step-by-step explanation:

The first row starts with 4 toothpicks, and they increase by +3 in each row.  The first tree is already accounted for which makes the 4 + 3, and why I have 100-1.  The teacher said the answer was correct but I doubted the equation.  Can you tell me if this is correct?

Mariana [72]3 years ago
4 0

Answer:

100 x 4 = 400 - 91 = 309

Step-by-step explanation:

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astra-53 [7]

Answer:

10 weeks

Step-by-step explanation:

Let's set an equation for you and your brother.

You have $90 plus $18 for every week you save (x).

90+18x

And your brother has $120 plus $15 dollars per week that he saves (x)

120+15x

You want to have the sum of the money equal so combine the two concluded statements

90+18x=120+15x

Arrange them so that you have like terms on each side

90+18x-15x=12+15x-15x

90+3x=120

90-90+3x=120-90

3x=30

x=10

"x" is our number of weeks you and your brother save so the answer is 10 weeks

Just to be sure you can use our equation and plug 10 for every time you see x to make sure our answer is right.

6 0
3 years ago
Jess owns 8 acres of land. She wants to divide it into lots of 25 of an acre.Use the drop-down menus to write an equation she ca
Korvikt [17]

Answer:

200

Step-by-step explanation:

I mean this one is pretty simple. all you do is 8*25 because she has 8 acres and each acre is divided into 25

5 0
2 years ago
Read 2 more answers
Point a,b and are collinear and b bet a,c if ab=48,ab=2x +2,and bc=3x+6 what is bc?​
koban [17]
8 bra cause that’s the answer I got for sure
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Are the two triangles below .similar?
kozerog [31]
Yes, because both of them have a 70 degree angle on T and W 
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Answer:

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Step-by-step explanation:

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