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Nadya [2.5K]
3 years ago
5

Anyone help me ASAP, its due in an hour, plz show all the working, THANK YOU SO MUCH

Mathematics
1 answer:
Leona [35]3 years ago
8 0

Answer:

Step-by-step explanation:

First, start out with the parent function:

y = b^{x}

Now, we look at the transformations, and make the equation.

We see that the graph <u>shifted down 4 units</u>, since the <u>graph's horizontal asymptote</u> is at y = -4.

y = b^{x} - 4

We see point (0, -3) to point (1, -1). The value of b would be 3. The reason is that when you <u>plug 0 in, you get 1, then 1 - 4 equals 3. (0, -3),</u>

<u>Then, when you plug in 1, you get 3, then 3 - 4 equals -1. This matches up with the graph.</u>

<u />

This is the answer:

y = 3^{x}-4

#teamtrees #WAP (Water And Plant)

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An instructor in a college class recently gave an exam that was worth a total of 100 points. The instructor inadvertently made t
solniwko [45]

Answer:

B) Method 2 will increase the standard deviation of the students' scores.

Step-by-step explanation:

Given that an instructor in a college class recently gave an exam that was worth a total of 100 points.

The average score for his students was 43 and the standard deviation of the scores was 5 points.

And now he is considering two different strategies for rescaling the exam results of which:

Method 1 = Add 17 points to everyone's score.

Method 2 = Multiply everyone's score by 1.7 .

And we have to check what will be the impact of these methods on the standard deviation of the students' scores.

For this let us consider a simple example to understand this:

Firstly, Formula for calculating Standard Deviation =  \sqrt{\frac{\sum (X-Xbar)^{2}}{n-1}}

Suppose,

     X             X - Xbar       (X - Xbar)^{2}

     3              3 - 6 = -3         -3 * -3 = 9

     5              5 - 6 = -1          -1 * -1 = 1

     10            10 - 6 = 4          4 * 4 = 16

<em>Mean of above data, Xbar</em> = \frac{3+ 5+10}{3} = 6

<em>Standard Deviation of data </em>= \sqrt{\frac{26}{3-1} } = 3.6055

Now let us suppose that we multiply each value of above data with 2 so the new data will be:

     X                X - Xbar           (X - Xbar)^{2}

 3*2 = 6        6 - 12 = -6         -6 * -6 = 36

 5*2 = 10       10 - 12 = -2       -2 * -2 = 4

10*2 =20      20 - 12 = 8         8 * 8 = 64

<em>Mean of new data, Xbar </em>= \frac{6+ 10+20}{3} = 12

<em>Standard Deviation of new data</em> = \sqrt{\frac{104}{3-1} } = 7.2111

<em>Hence, we see that when we multiply any value to the data the standard deviation will increase and in other words it will multiplied by that value which value we multiplied with each data value i.e. when we multiply each data value with 2 the standard deviation also get multiplied by as </em>

  3.6055 * 2 = 7.2111

Therefore option B is correct that Method 2 will increase the standard deviation of the students' scores.

<em>And on the other hand Similarly by adding any constant to the data the Standard Deviation will remain same. Therefore Method 1 will have no impact on standard deviation of the students' scores.</em>

8 0
3 years ago
Use the equation below to find T, if w=85, m= 12, and a=3.<br> T=w-ma<br> T = 3,060<br> X<br> ?
saw5 [17]

Answer:

T = 49

Step-by-step explanation:

T = w - ma

w = 85

m = 12

a = 3

Plug in the corresponding numbers to the corresponding variables:

T = (85) - (12) * (3)

Remember to follow PEMDAS. PEMDAS is the order of operations, and stands for:

Parenthesis

Exponents (& Roots)

Multiplications

Divisions

Additions

Subtractions

First, multiply, then subtract:

T = 85 - (12 * 3)

T = 85 - 36

T = 49

T = 49 is your answer.

~

6 0
2 years ago
Whats 5+5? like legit i don't know
soldi70 [24.7K]

Answer:

ten.

Step-by-step explanation:

4 0
2 years ago
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Determine the intercepts of the line.<br> y= 4x +7<br> -intercept:<br> y-intercept:<br> 2
kati45 [8]

Answer:

2=4x+7

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
If you were to deposit $1,000 into an account that paid 10 percent interest compounded semiannually, how much money would you ha
dexar [7]
Semiannual means there will be two total periods in a year. Divide ten percent by two to get the interest rate per period. Then multiple by 1+i twice

6 0
2 years ago
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