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nadya68 [22]
3 years ago
13

One people mover has a velocity of 2m/s and is used to move people to a gate 200 m away two different people were traveling to t

he gate the first person stood still on the people mover while the second person was walking on it at 3m/s
How much longer would it take the first person to arrive at the gate
SAT
1 answer:
Ne4ueva [31]3 years ago
4 0

Answer:

60 sec.

Explanation:

The first person has to travel 200m at 2 m/s. It will take him 200/2=100 seconds to reach the gate. The second person is moving towards the gate at 2 + 3 meters per second so it will take her 200/5 = 40 seconds to reach the gate. Therefore, person #1 needs an extra 100-40 = 60 seconds.

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Miguel can use all or part of his $25 gift card to make a music purchase. Each song costs $1. 50, and there is a $1. 00 per acco
Leviafan [203]

Answer: The answer is the first one and the last one.

Explanation: If an account cost $1 and each song is 1.5x. It has to be less than or equal to 25. So it would be $1 for (the account plus) 1.5x for (how many songs he buys) is less than or equal to 25 (the ammount on the gift card).

4 0
2 years ago
Given the function f(x) = 3(x – 2)2 + 4 with a restricted domain of x ≥ 2, which of the following represents f–1(x)?.
Debora [2.8K]

The inverse of the function is f^{-1}x= \sqrt{\frac{x-4}{3} } + 2

<h3 /><h3>Domain and Range of functions</h3>

Given the function

f(x) = 3(x - 2)^2 + 4

To get the inverse, you will follow the same step as shown:

Rewrite the equation to have:

y= 3(x - 2)^2 + 4

Replace x with y

x = 3(y - 2)^2 + 4

<h3>Make y the subject of the formula</h3>

x = 3(y - 2)^2 + 4\\x-4=3(y - 2)^2\\\frac{x-4}{3} = (y-2)^2\\ y-2=\sqrt{\frac{x-4}{3} } \\y = \sqrt{\frac{x-4}{3} } + 2

Hence the inverse of the function is f^{-1}x= \sqrt{\frac{x-4}{3} } + 2

Learn more on inverse of a function here: brainly.com/question/2873333

6 0
2 years ago
What is gcf of 100 +350
Sergio039 [100]
The greatest common factor is 50
4 0
3 years ago
What are the coefficients for the binomial expansion of (a b)3? 1, 4, 6, 4, 1 1, 1 1, 2, 1 1, 3, 3, 1
Advocard [28]

The coefficients for the binomial expansion of (a + b)³ are 1, 3, 3, 1.

We have,

The binomial expansion (a + b)³,

So,

Now,

We know that,

Formula for binomial expansion,

i.e.

(u + v)ⁿ = ⁿC₀ · uⁿ · v⁰ + ⁿC₁ · uⁿ⁻¹ · v¹ + ⁿC₂ · uⁿ⁻² · v² + ⁿC₃ · uⁿ⁻³ · v³

Now,

According to the question,

Here,

u = a,

v = b,

And, n =3

Now,

Putting values,

i.e.

(a + b)³ = ³C₀ · a³ · b⁰ + ³C₁ · a³⁻¹ · b¹ + ³C₂ · a³⁻² · b² + ³C₃ · a³⁻³ · b³

We get,

(a + b)³ = ³C₀ · a³ · b⁰ + ³C₁ · a² · b¹ + ³C₂ · a¹ · b² + ³C₃ · a⁰ · b³

Now,

Using combination formula,

^{n} C_{r} = \frac{n!}{r!(n-r)!}

On solving we get,

(a + b)³ = a³ + 3 a² b + 3 a b² + b³

So,

Now,

The coefficients of :

a³ = 1,

3a²b = 3,

3ab² = 3,

b³ = 1,

So,

The coefficients of the given binomial expansion are 1, 3, 3, 1.

Hence we can say that the coefficients for the binomial expansion of (a + b)³ are 1, 3, 3, 1.

Learn more about binomial expansion here

brainly.com/question/3632340

#SPJ4

4 0
1 year ago
In triangle ABC, the measure of ∠B is 90°, BC=16, and AC=20. Triangle DEF is similar to triangle ABC, where vertices D, E, and F
Andreas93 [3]
  • AC=Hypotenuse=20
  • BC=Base=16

AB:-

Apply Pythagorean theorem

\\ \rm\rightarrowtail P^2=H^2-B^2

\\ \rm\rightarrowtail P^2=20^2-16^2

\\ \rm\rightarrowtail P^2=400-256

\\ \rm\rightarrowtail P^2=144

\\ \rm\rightarrowtail AB=12

Now

  • DE=AB/3=12/3=4
  • EF=BC/3=16/3=5.3
  • DF=AC/3=20/3=6.6

Now

\\ \rm\rightarrowtail sinF=\dfrac{DE}{DF}

\\ \rm\rightarrowtail sinF=\dfrac{4}{6.6}

\\ \rm\rightarrowtail sinF=0.61

4 0
1 year ago
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