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katovenus [111]
2 years ago
12

Evaluate the expression for x =5 and y= 1 (x-7y)² pretty confused

Mathematics
2 answers:
Ghella [55]2 years ago
7 0

Answer:

49y^2+y-25=0

Step-by-step explanation:

(5_7y)^2=25-49y^2

y=25-49y^2=49y^2+y-25=0

sveticcg [70]2 years ago
5 0

Answer:

-4

Step-by-step explanation:

So since x=5 and y= 1 the new expression would be 1(5-7) to the second power. Using pemdas, 5-7 is -2. -2 to the second power is -4. negative 4 times 1 is negative 4.

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(7 points) Cars arrive at a toll both according to a Poisson process with mean 80 cars per hour. If the attendant makes a two-mi
saveliy_v [14]

Answer:

The probability that at least 1 car arrives during the call is 0.9306

Step-by-step explanation:

Cars arriving according to Poisson process - 80 Cars per hour

If the attendant makes a 2 minute phone call, then effective λ = 80/60 * 2 = 2.66666667 = 2.67   X ≅ Poisson (λ = 2.67)

Now, we find the probability: P(X≥1)

P(X≥1) = 1 - p(x < 1)

P(X≥1) = 1 - p(x=0)

P(X≥1) = 1 - [ (e^-λ) * λ^0] / 0!

P(X≥1) = 1 - e^-2.67

P(X≥1) = 1 - 0.06945

P(X≥1) = 0.93055

P(X≥1) = 0.9306

Thus, the probability that at least 1 car arrives during the call is 0.9306.

5 0
2 years ago
1. Janna works at a lab with a huge circular particle accelerator. It has a radius of 4 kilometers. What is the accelerator's di
blsea [12.9K]

Answer:

1. diameter=8 kilometres

2. area=98.96 inches

3. 37m

Step-by-step explanation:

1. diameter= 2*radius

2. area of sector=θ out of 360*πr^{2} where θ is the angle

3. area of garden=πr^{2}

        706.5=πr^{2}

     r^{2}=706.5/π

        = 225(nearest whole)

     r=\sqrt{225}=15m

we now use Pythagoras theorem to find length of each pathway

40^{2} =15^{2} +x^{2}

1600=225+x^{2}

x^{2}=1600-225=1375

x=\sqrt{1375}=37 m (to nearest whole)

5 0
3 years ago
This one is confusing (slope)
Komok [63]

The answer is positive 1/5. Here is a tip, when reading a graph read from left to right. If it is going up to the right it is positive. If it goes down going to the right it is negative. Also think rise/run. Count how many times it goes up(or down) then count how long the line goes.

5 0
2 years ago
Chuck built a garden in the shape of a rectangle in his backyard. The width of the garden is 7 feet and the length of the garden
Nastasia [14]
The answer is 25 because of the Pythagorean theorem. 49+576=625 625 squared=25
5 0
3 years ago
Complete each statement with the correct measurement.
frutty [35]

Answer:

250

Step-by-step explanation:

All you have to do to go from L to mL is x1000

5 0
2 years ago
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