3 years ago

Please help i dont understand this at all

Mathematics

1 answer:

mylen [45]3 years ago

7 0

Answer:

Step-by-step explanation:

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Brut [27]

Answer: 1251

Step-by-step explanation:

Given

Leia is setting up 417 toy cars

Each car needs 3 batteries to drive

So, 417 cars need

$\Rightarrow 417\times 3\\\Rightarrow 1251\ \text{batteries}$

Thus, 1251 batteries is needed.

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3 years ago

42-3y ≥ 7 o y ≤ - 35/3 o y ≥ - 35/3 o y ≤ 35/3 o y ≥ 35/3 Please help!

Viefleur [7K]

C. Is the answer. ......................

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3 years ago

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The perimeter of a triangle is 84. The longest side is 7 meters less than twice the length of the shortest side, x. The middle s

elixir [45]

Perimeter = Side + Side + Side
Side 1 = x
Side 2 = x + 7
Side 3 = 2x-7

Plug into the equation:
84 = x + (x + 7) + (2x-7)
84 = x + x + 7 + 2x - 7

Combine like terms:
84 = 4x

Divide by 4 and solve for x:
21 = x

Side 1 = 21

Side 2 = 28
21+7=28

Side 3 = 35
21(2) - 7 = 42 - 7 = 35

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3 years ago

Which expression is equivalent to (2x + 3)2 – 5?

ddd [48]

4x+6-5
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3 years ago

If a convex polyhedron has 12 edges and 8 faces, then how many vertices does it have?

Vika [28.1K]

Hi

Use Euler's formula for this for a 3D figure. F + V = E + 2, where F is the number of faces, V is the number of vertices, E is the number of edges, +2! You have enough info to fill in the formula to find that the number of vertices is 6.
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4 years ago

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