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2 years ago

What’s the speed limit in kph for a speed limit of 20 miles per hour if 100 kilometers per hour is 62 miles per hour

Mathematics

1 answer:

Komok [63]2 years ago

4 0

Answer:

47mph and 32kph the ratio is 1.6kph for every 1 so divide by 1.6 and the second you multiply

Step-by-step explanation:

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Fred spent half of his allowance going to the movies. He washed the family car and earns 7 dollars. What is his weekly allowance

KiRa [710]

15=0.5x+7
0.5x=12
X=24
His weekly allowance is $24

4 0

3 years ago

An experimental drug is administered to 80 randomly selected individuals, with the number of individuals responding favorably r

Solnce55 [7]

Answer:

Yes, because the experiment satisfies all the criteria for a binomial experiment.

Step-by-step explanation:

A binomial experiment has the following criterias,

1. There must be a fixed number of trials

2. Each trial is independent of the others

3. There must be only two outcomes ( success and failure )

4. The probability of each outcome is same.

Given,

An experimental drug is administered to 80 randomly selected individuals, with the number of individuals responding favorably recorded,

The number of trials = 80 ( fixed )

Each individuals is independent,

Total outcomes = 2 ( yes or no ),

Also, the probability of each individual is same,

Hence, the given probability experiment represent a binomial experiment.

3 0

2 years ago

Given 15 cot A = 8, find sin A and sec A.

pogonyaev

Answer:

sin A = 15/17

sec A = 17/8

Step-by-step explanation:

15 cot A = 8

First get cot A alone.

cot A = 8 / 15

Since cot is the reciprocal of tan then flip 15 and 8.

tan A = 15 / 8

Now you have the opposite and adjacent sides, just find the hypotenuse with Pythagorean's theorem

15^2 + 8^2 = 289

$\sqrt{289}$ = 17

Now that you have all the sides use the opposite and hypotenuse to get sine and the adjacent and hypotenuse to get cosine then flip to get secant.

sin A = 15/17

cos A = 8/17

sec A = 17/8

7 0

2 years ago

The ratio of cups of water to cups of milk in a recipe is 1 to 3.

Bumek [7]

What is the question to your problem? Sorry...

8 0

3 years ago

Evaluate each function.<br> 1) f(x) = x2 + 4x; Find f(-7)

katrin [286]

Answer:

The answer is -77

Step-by-step explanation:

Ok, so assuming by x2 you mean x squared, I will solve this. So basically when you have a function, f(-7) would mean that you would have to replace all the x's in the equation with -7. So let's write that out. that would be f(-7) = -7^2 + (-7*4). So now according to PEMDAS, you would solve the exponent first, and -7^2 is equal to -49, because when you solve it you would do -(7^2), which is -(49), which is then -49. So now you have f(-7)= -49+ (4*-7). Solving for (4*-7), you get -28. This leaves you with -49 + (-28), which is -49 - 28. Simplifying that, you get the answer, which is -77.

5 0

2 years ago