Susan solved 200-91 and decided o add her answer to 91 to check her work. Explain why this strategy works

2 answers:

6 0

This strategy works because you would want to make sure that the two numbers add up to the number you subtracted it from. Hope this helped and have an awesome day!

kaheart [24]3 years ago

4 0

109+91=200 it works because of the missing number is now placed in the equation

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Let u = <6, -9>, v = <1, -4>. Find u - v.

melamori03 [73]

To subtract vectors, subtract the x coordinates together. Do the same for the y coordinates as well.

In terms of a formula if we had the vectors u and v such that
u = <a,b>
v = <c,d>
then
u - v = <a-c, b-d>

Let's use that to get...
u - v = <6,-9> - <1,-4>
u - v = <6-1,-9-(-4)>
u - v = <6-1,-9+4>
u - v = <5,-5>
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Answer: A) <5,-5>

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kirill [66]

Answer:

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Step-by-step explanation:

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3 years ago

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The extremes in the proportion 3/4=15/20 are

ollegr [7]

<span>In the form of a/b = c/d in proportions in math, the outer terms are called the extremes and the inner terms are called means. In the given 3/4 = 15/20, the outer terms or the extremes are 3 and 20.</span>

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3 years ago

The probability that someone owns an iPhone is 62%. The probability that someone owns an Apple watch is 15%. The probability som

Dmitry [639]

ANSWER

The probability that someone owns an iPhone or an Apple watch is

$P(I \cup \: A) = 69\%$

or

$P(I \cup \: A) = 0.69$

EXPLANATION

We were given that, the probability that someone owns an iPhone is

$P(I)=62\%$

and the probability that someone owns Apple watch is

$P(A)=15\%$

and the probability that someone owns both is

$P(I \cap \: A) = 8\%$
Since the intersection is not zero, it means the two events are not mutually exclusive.

The probability that someone owns an iPhone or Apple phone is

$P(I \cup \: A) = P(I) + P(A) - P(I \cap \: A)$

We substitute the values to get,

$P(I \cup \: A) = 62\% + 15\% - 8\%$

$P(I \cup \: A) = 69\%$

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3 years ago

What is the inverse of the function f(x)=4x?

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F -1(x) = 4x
If you supply 3 for the function of F so f(3) = 4x then 4 x 3 = 12
The inverse would be
One way to work out an inverse function is to reverse the operations that f carries out on a number. Here is a simple example. We shall set f(x) = 4x, so that f takes a number x and multiplies it by 4: f(x) = 4x (multiply by 4). We want to define a function that will take 4 times x, and send it back to x. This is the same as saying that f −1 (x) divides x by 4. So f −1 (x) = 1 4 x (divide by 4). There is an important point about notation here. You should notice that f −1 (x) does not mean 1/f(x). For this example, 1/f(x) would be 1/4x with the x in the denominator, and that is not the same as 1 4 x.

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3 years ago