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Eddi Din [679]
3 years ago
6

Four times a number increased by 3 is -89

Mathematics
2 answers:
Likurg_2 [28]3 years ago
5 0

Answer:

-21.5

Step-by-step explanation:

so we will go backwards -89 + 3 = -86

-86/4 = -21.5

Hope this helps!

sp2606 [1]3 years ago
4 0

Answer:

-21.5

Step-by-step explanation:

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Describe the x-values for which (a) f is increasing or decreasing, (b) f(x) > 0 and (c) f(x) < 0
Kryger [21]

(a) The function "f" is increasing for the x-values of [(-∞) < x ≤ 0] and            [2 < x < ∞], while "f" is decreasing for the x-values of [0 < x ≤ 2].

(b) The function f(x) is greater than 0 at [(-1) < x < ∞], excluding the point  (x = 2)

(c) The function f(x) is less than 0 when [x < (-1)]

In the reference attachment attached along with the question statement, we are provided with a graph of a certain function "f",

And as per the question statement, we are required to determine the x-values for the following:

(a) for which "f" is increasing or decreasing,

(b) [f(x) > 0]

(c) [f(x) < 0]

From the graph, it is very clear that, the slope is rising from [(-∞) < x ≤ 0] and [2 < x < ∞], while, declining from [0 < x ≤ 2] of the x-axis. Therefore,

(a) The function "f" is increasing for the x-values of [(-∞) < x ≤ 0] and            [2 < x < ∞], while "f" is decreasing for the x-values of [0 < x ≤ 2].

(b) The function f(x) is greater than 0 at [(-1) < x < ∞], excluding the point  (x = 2)

(c) The function f(x) is less than 0 when [x < (-1)]

To learn more about x-values of increasing or decreasing functions, click on the link below.

brainly.com/question/28912753

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7 0
1 year ago
Consider two stocks. Stock 1 always sells for $10 or $20. If stock 1 is selling for $10 today, there is a .80 chance that it wil
Hitman42 [59]

Answer:

On stock 2 will be has an average sell of $50 for higher price.

Step-by-step explanation:

stock 1 of $10 (today)+ $10 (80% chance tommorow)=$20 stock sell price and for $20(today)+$20(90% chance tommorow)= $40 this two final of price for stock 1.

Stock 2 of $10 (today)+$10(90% chance tommorow)= $20 and of $25(today)+$25(85% chance tomorrow)= $50 this two for final of it's price for stock 2.So as for Stock 2 has the average sell higher price.

Hope this helps you

5 0
3 years ago
Help plz :) <br><br><br> Solve for A <br><br> A.45 <br> B.25<br> C.115<br> D.10
Tatiana [17]
Its a right angle so 65 take away from 90 is 25
6 0
4 years ago
Can u please help me with this
zhannawk [14.2K]

Answer:

1/4

1/6

7/10

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5 0
2 years ago
1.What is the interquartile range for the data set?
devlian [24]
1. First, put the range in order and then divide the set into quarters. In this case, quartiles are between numbers.
<span>83, 85, 89,   l    91, 95, 104,  l   112, 118, 118,  l  125, 134, 138
Q</span>₁ = (89 + 91)/2 = 90
Q₂ = (104 + 112)/2 =108
Q₃ = (118 + 125)/2 = 121.5
Interquartile range (IQR) = Q₃ - Q₁
                                        = 121.5 - 90
                                 IQR = 31.5
2. To find the standard deviation follow the simple steps.
Formula in finding the standard deviation: (see attached file)
     Step 1. Work out the simple average of the numbers (mean)
                <span><span><u>212 + 249 + 212 + 248 + 239 + 212 + 216 + 234 + 248</u>
</span>                                                  9
              = <span><u>2070</u>
</span>                     9
mean (</span>μ) = 230
    
    Step 2. Subtract the mean on each number and square the result.
212 - 230 = (-18)² = 324<span>
249 </span>- 230 = ( 19)² = 361<span>
212 </span>- 230 = (-18)² = 324<span>
248 </span>- 230 = (18)²  = 324<span>
239 </span>- 230 = (9)²    = 81<span>
212 </span>- 230 = (-18)² =324<span>
216 </span>- 230 = (-14)² =196<span>
234 </span>- 230 = (4)²    =16<span>
248 </span>- 230 = (18)²  =324

     Step 3. Add all the squared results and get the mean.
                  <span><u>2274</u>
</span>                     9
       Variance = 252.6666667
    Step 4. Get the square root of the variance.
                  √252.6666667
                  = 15.89549202
     
3 0
3 years ago
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