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Maru [420]
4 years ago
7

The product of a number and 1 is less than the number is 90. find the number.

Mathematics
1 answer:
Digiron [165]4 years ago
6 0
90 = -9×-10 = 10×9

The number could be either -9 or +10.

_____
You can solve this based only on your knowledge of the factors of 90. If you like, you can write an equation ...
  x(x-1) = 90
  x² - x - 90 = 0
Factoring this has you seeking factors of 90 that differ by 1, the same as the original problem does. Of course, you can solve this by other means, including the quadratic formula or completing the square or graphing.
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3 years ago
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dmitriy555 [2]

Answer for Question 1 is option 2  

Answer for Question 2 is option 3  

Answer for Question 3 is option 3  

Step-by-step explanation:  

For question 1 by plotting the two points we get the coordinates as (-2, 3) and (2, 1) where the x values are -2, 2 and the y values are 3, 1 respectively.  By substituting values of x in the formula given we get that equation 2 satisfies the values of y as in the graph.  

For question 2 the plotted line is split into two parts where one half is for values of x <2 and the other half is for values of x>2. By finding out the coordinates we get them as (2,-2), (1,-2.5) and (0,-3) for x<2 and by substituting the values of x in the formula we get option 3 as our answer.  

For question 3 we need to find the value of y when x=3 and the first condition is only for values greater than 3 so we take the second condition and substitute the value of x=3 and we get the value of y as 5 so the answer is option 3  

               

5 0
3 years ago
Linda purchases 4/5 of a pound of apples for $5.00. What is the cost per pound of apples?
bonufazy [111]

Answer:

$6.25 per pound

Step-by-step explanation:

We can set up a simple ratio to solve this.

If 4/5 pounds = $5, then 1 pound = x

We can write two ratios and equate them:

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So 1 pound of apple cost $6.25

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3 years ago
A main goal in statistics is to interpret and understand the meaning of statistical values. the​ _______ can be very helpful in
aev [14]
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3 years ago
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Vinvika [58]

Answer:

No

Step-by-step explanation:

the mean is 16 (add 4+5+5+8, then divide answer by 4) and the mode is 5 (occurs most in data)

5 0
2 years ago
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