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katrin2010 [14]
3 years ago
14

Geometry please help

Mathematics
1 answer:
marta [7]3 years ago
5 0

I'd say C because the lengths do not have to be the same but the angles do

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How do i show the substitution method to solve x=5y-7 and 3y+2y=12
Katena32 [7]

Answer:x=-20  y=4

Step-by-step explanation:

5 0
3 years ago
Pls pls pls help!!!!!!
gtnhenbr [62]

9514 1404 393

Answer:

  • ornament area = 379.8 cm²
  • paint needed: 114 bottles

Step-by-step explanation:

The surface area of one cone with slant height s and radius r is ...

  SA = πr² +πrs = πr(r+s)

For the cone that is half an ornament, the surface area is ...

  SA = (3.14)(4.2 cm)(4.2 cm + 10.2 cm) = 189.9072 cm²

The area of one ornament is the area of two cones:

  one ornament area = 2×189.9072 cm² ≈ 379.8 cm²

60 ornaments will be 120 cones, so will have a total surface area of ...

  total area = 120(189.9072 cm²) = 22,788.864 cm²

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If one bottle of paint will cover 201 cm², then the number of bottles of paint required is ...

  (22788.864 cm²)/(201 cm²/bottle) ≈ 113.4 bottles

5 0
3 years ago
A liquid substance was left at the scene of the crime. Krisann uses a beaker that measures to the nearest tenth of a liter and f
AVprozaik [17]
4.85 <= x < 4.95 .  does not intersect x > 5.No it does not need to be sent to the lab. B.
<span>yes, since the beaker meaures to the nearest tenth of a liter , the range of the actual value is plus or minus 0.1 liters , which means there could be up to 5 liters of the substance </span>
8 0
3 years ago
A survey of 1250 trees in a small wood showed that 32 percent were oak trees 26 percent were birch trees and the remainder were
timofeeve [1]

Answer: There were 525 pine trees.

Step-by-step explanation:

Given: Total trees = 1250

Percentage of oak trees = 32%

Percentage of birch trees = 26%

Since remaining trees are pine trees.

Percentage of pine trees = 100% - 32% - 26%

=42%

The number of pine trees = 42% of 1250

= 0.42 ×1250

= 525

Hence, there were 525 pine trees.

5 0
2 years ago
Someone please help!! :^(
sineoko [7]

Answer:

equation of the table is y=30x+60

60 degrees is what the temperature starts at

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Step-by-step explanation:

the change in y over change in x is 90/3 which is the slope

slope is 30

if slope is 30 then 30*2+b=120 60+b=120 so b=60 and it is the y intercept

440=30x+60

380=30x

x=12 2/3

x= 12 minutes and 40 seconds

8 0
3 years ago
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