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Helen [10]
2 years ago
11

A drink and a sandwich together cost $4.85. The sandwich cost $1.35 more than the drink. How much does the sandwich cost.

Mathematics
1 answer:
Amiraneli [1.4K]2 years ago
8 0
Answer:$6.20
$4.85+1.35=6.20
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Lindsay says all numbers that are multiples of 4 have 2 as a factor. Is lindsay correct?
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Let A, B, C and D be sets. Prove that A \ B and C \ D are disjoint if and only if A ∩ C ⊆ B ∪ D
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Step-by-step explanation:

We have to prove both implications of the affirmation.

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With this, we can say that x ∈ A \ B and x ∈ C \ D.

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That proves that A ∩ C ⊆ B ∪ D.

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We'll prove it again by reducing to absurd.

Let's suppose that  A \ B ∩ C \ D is not empty. That means there is an element x that belongs to  A \ B ∩ C \ D. Therefore, x ∈ A \ B and x ∈ C \ D.

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With this, we can say that x ∈ A ∩ C and x ∉ B ∪ D.

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3 years ago
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Step-by-step explanation:

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Inner-most powers: 2⁻¹⁶ • 5¹⁰ • 1 • 5⁻⁸/2¹² • 2²⁸

Combine like terms: 2¹² • 5²/2¹²

Cancel out: 5²

Solve: 25

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