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3 years ago

Explaining it thoroughly and you will be mark as Brainiest…

Mathematics

2 answers:

Lostsunrise [7]3 years ago

8 0

Answer: It says it right there

Step-by-step explanation:

create a video explaning

siniylev [52]3 years ago

3 0

Answer:

Can you not make your own video or something

Step-by-step explanation:

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What is the area of a circle with a radius of 42 in use 3.14 for pi

Vanyuwa [196]

The right answer is 5538.96 units^2

please see the attached picture for full solution 

Hope it helps

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6 0

3 years ago

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The hypotenuse of a right triangle is 10 ft long. the shorter leg is 2ft shorter than the longer leg. find the side lengths of t

Gwar [14]

Since we have two possible pieces of information and 2 items to solve for, we know this is a system of equations.
Our first piece of information is that our shorter leg (s) is 2 feet shorter than our longer leg (l). This can be written as s=l-2.
Our second piece of information is that using the Pythagorean theorem that our shorter leg squared plus our longer leg squared is equal to our hypotenuse squared. This can be represented by s^2+l^2=10^2. Now we can solve.
We have already isolated for s in our first equation, so we can substitute l-2 in.
(l-2)^2+l^2=10^2
l-2+l=10
2l-2=10
2l=12
l=6
Now we can substitute in for s in our simpler equation
s=6-2
s=4
We now know that using our knowledge of systems of equations, the side lengths of this right angle triangle are 6 and 4.

5 0

3 years ago

I need help with this. 2x+4=4x

xxTIMURxx [149]

2x + 4 = 4x

4 = 2x

x = 2

Hope that helps :)

4 0

3 years ago

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A toy store’s percent of markup is 30%. A model train costs the store $50. Find the markup.

Over [174]

Answer: $15

Step-by-step explanation:

To find the markup price just multiply 30% by the amount.

30% * 50

0.3 * 50 = 15

4 0

2 years ago

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A gas station sells two grades of gasoline: regular and super. These are priced at $2.00 and $3.00 per gallon, respectively. Let

djyliett [7]

Answer:

(a) E(Y) = 4400

sd (Y) =225

(b) P(Y ≤ 4500) = 0.67003

Step-by-step explanation:

(a) Here we have

Y = 2·X₁ + 3·X₂

Therefore E(Y) = 2·E(X₁) + 3·E(X₂) = 2000 + 2400 = 4400

sd(Y) is given by

Variance Y = (sd (Y))² = 2²·(sd (X₁))² + 3²·(sd (X₂))²

= 4·8100 + 9·2025 = 50625

sd (Y) = √50625 = 225

(b) The probability that the revenue does not exceed 4500 is given by

P(Y ≤ 4500) = P(z ≤0.444)

z = $\frac{\overline{\rm x} - \mu} {\sigma /\sqrt{n} }$

z = $\frac{4500 - 4400} {225 /\sqrt{1} }$ = 0.444

Therefore from the normal distribution table, we have

P = 0.67003

Since the gas station sells 2 portions of X₁ to 3 portions of X₂

Therefore, the probability that the gas station sells more of X₁ is given by

₅C₀ × 2/5⁰×3/5⁵ = 0.07776

₅C₁ × 2/5¹×3/5⁴= 0.2592

₅C₂ × 2/5²×3/5³ = 0.3456

P (X₁ > X₂) = 1 - 0.68256 = 0.31744

6 0

3 years ago

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