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3 years ago

I need help please :D Here is the question :)

Mathematics

2 answers:

r-ruslan [8.4K]3 years ago

4 0

Answer:

The answer is +2

Step-by-step explanation:

r is a variable and a coefficient is a number that comes before the variable or variables. for example, -4x has a coefficient of -4 and 10a is +10

Wittaler [7]3 years ago

3 0

Answer:

Step-by-step explanation:

A coefficient is the number before the variable.

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How I can answer this question, NO LINKS, If you answer correctly I will give u brainliest!

aev [14]

The answer for 1. A
Answer for 2. B
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2 years ago

Can someone explain to me the letter or sign or variable after "Y"

sattari [20]

Answer:

It is a symbol used to denote an angle (or something else)

Step-by-step explanation:

Alpha(α) is a greek letter, it's one of the letters used to denote angles. Other such letters you'll often see in math are Beta (β), Gamma (γ), Delta (δ), these are used to denote angles. Also, pi (π), which is a mathematical constant. The letters phi (φ) and theta (θ) are also used for angles very often, especially in formulas. You'll see some of these in physics too.

It can be used as variable too, not necessarily for angles, but it's mostly used for them.

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3 years ago

Bob needs to mix 5 cups of liquid lemonade concentrate with 2.5 cups of water to make lemonade. Bob has 2.5 cups of liquid lemon

Julli [10]

Answer:

3.75 cups

Step-by-step explanation:

Given that :

5 cups of liquid lemonade concentrate is mixed with 2.5 cups of water to make lemonade

5 cups of lemonade = 2.5 cups of water

Ratio :

5 / 2.5

For 2.5 cups of lemonade :

5 / 2.5 = 0.5

Multiply :

5 / 2.5 * 0.5 / 0.5

2.5 / 1.25

Hence, 2.5 cups + 1.25 cups = 3.75 cups of lemonade will be made with 2.5 cups of liquid lemonade concentrate

7 0

3 years ago

a student ran out of time on a multiple choice exam and randomly guess the answers for two problems each problem have four answe

katen-ka-za [31]

Answer:

The probability that he answered neither of the problems correctly is 0.0625.

Step-by-step explanation:

We are given that a student ran out of time on a multiple-choice exam and randomly guess the answers for two problems each problem have four answer choices ABCD and only one correct answer.

Let X = Number of problems correctly answered by a student.

The above situation can be represented through binomial distribution;

$P(X=r)=\binom{n}{r}\times p^{r}\times (1-p)^{n-r};x=0,1,2,3,....$