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chubhunter [2.5K]
3 years ago
14

Choose the correct answer

Mathematics
1 answer:
ElenaW [278]3 years ago
3 0
1450 miles / 350 mph = 4.1428 hours
4.1428 hours = 4 hours and 9 minutes
So the total travel time is 4 hours and 47 minutes. So A
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Solve 7x - 8 = 3x + 40
Contact [7]

Answer:

7x-8=3x+40\\7x-3x=40+8\\4x=48\\x=12

4 0
3 years ago
Read 2 more answers
Which function has real zeros at x= -2 and x=5?
hammer [34]

x = -2, x = 5

=> f(x) = a(x+2)(x-5),  a ∈ R

3 0
3 years ago
According to police sources, a car with a certain protection system will be recovered 87% of the time. Find the probability that
WITCHER [35]

Answer: 0.01145

Step-by-step explanation:

We use Binomial distribution , where the probability of getting x successes in n trial is given by :-

P(x)=^nC_xp^x(1-p)^{n-x} , p = probability of getting each success in each trial.

As per given

The proportion that a car with a certain protection system will be recovered= p=0.87

n= 8

Let x be the number of cars will be recovered.

Then, the probability that 4 of 8 stolen cars will be recovered:

P(X=4)=^8C_4(0.87)^4(1-0.87)^{8-4}

=\dfrac{8!}{4!(8-4)!}(0.87)^4(0.13)^4\\\\= 70(0.57289761)(0.00028561)\\\\=0.0114537700474\approx0.01145

Hence, the required probability is 0.01145.

5 0
3 years ago
Please help answer thisq​
Julli [10]

Answer:

More than one independent variable being tested.

Step-by-step explanation:

If a student wants to figure out if ONLY salt affects the growth of seeds, the student shouldn't change the amount of sunlight being received.

5 0
2 years ago
The area of a rectangle is 30 + 12x. List at least 3 possibilities for the length and width of the rectangle.
Gala2k [10]

Answer:

Below in bold.

Step-by-step explanation:

Area  = 30 + 12x and area is also = to width * length so we need to look for factors of 30 + 12x.

30 + 12x = 6(5 + 2x)

So  6 and 5 + 2x  is one possible answer.

3 and 10 + 4x is another.

12 and 2.5 + x is another.

If we multiply these pairs together we see that the result is

30 + 12x in each case.

6 0
3 years ago
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