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elena-14-01-66 [18.8K]
3 years ago
11

2x ^2 −5=3x

Mathematics
1 answer:
expeople1 [14]3 years ago
3 0

Answer:a

Step-by-step explanation:

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A soup can has a 3 and one eighth in diameter and is 5 in tall. What is the area of the paper that will be used to make the labe
Mamont248 [21]

Answer: 49.09 cm2

Step-by-step explanation:

Hi, to answer this question we have to apply the next formulas:

Circumference of a circle = π x diameter = 3.14159x 3 1/8 = 9.81746 in

The circumference of the can is equal to the length of the rectangular label:

Surface area (S)= circumference(length) x height  

Replacing with the values given:

S = 9.81746 x 5 = 49.09 cm2

Feel free to ask for more if needed or if you did not understand something.

5 0
3 years ago
You randomly choose one of the tiles shown below. What is the probability of choosing a number less than 5? *
Bad White [126]

Answer:

1/3

Step-by-step explanation:

There are 12 tiles. There are 4 numbers less than 5, so the probability would be 4/12 so we simplify it to 1/3

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3 years ago
The width of a rectangle is 9 cm. The perimeter is 40 cm. What is the length of the rectangle?
Keith_Richards [23]

Answer:

11

Step-by-step explanation:

2(l+w)

40= 2(9+x)

40= 18+2x

Subtract 18 from 40

22=2x

Divide 2x by itself and 22

11=x or x=11

6 0
3 years ago
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I need explanations for Mathematical Proofs.
erma4kov [3.2K]

Answer:

Proofs employ logic expressed in mathematical symbols, along with natural language which usually admits some ambiguity. In most mathematical literature, proofs are written in terms of rigorous informal logic.

According to Bleiler-Baxter & Pair [22], for a mathematician, a proof serves to convince or justify that a certain statement is true. But it also helps to increase the understanding of the result and the related concepts. That is why a proof also has the role of explanation.

There are many different ways to go about proving something, we'll discuss 3 methods: direct proof, proof by contradiction, proof by induction. We'll talk about what each of these proofs are, when and how they're used. Before diving in, we'll need to explain some terminology.

Although I will focus on proofs in mathematical education per the topic of the question, first and foremost proofs are so hard because they involve taking a hypothesis and attempting to prove or disprove it by finding a counterexample. There are many such hypotheses that have (had) serious monetary rewards available.

In logic and mathematics, a formal proof or derivation is a finite sequence of sentences (called well-formed formulas in the case of a formal language), each of which is an axiom, an assumption, or follows from the preceding sentences in the sequence by a rule of inference.

All mathematicians in the study considered proofs valuable for students because they offer students new methods, important concepts and exercise in logical reasoning needed in problem solving. The study shows that some mathematicians consider proving and problem solving almost as the same kind of activities.

More information for you..

https://youtu.be/V5tUc-J124s

https://youtu.be/dMn5w4_ztSw

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3 0
3 years ago
Which algebraic equation models the English sentence, a number subtracted from 8 is equal to 4?
kykrilka [37]

let's x represent a number

8-x = 4

3 0
3 years ago
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