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marshall27 [118]
3 years ago
10

Find two numbers whose sum is -39 and whose product is 10

Mathematics
1 answer:
nexus9112 [7]3 years ago
3 0
A) x + y = -39
B) x * y = 10

From A) we see x = -y -39 then we substitute this into B
B) (-y -39) * y = 10
-y^2 -39y = 10
-y^2 -39y -10 = 0

y = -38.742
x = -.258


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How does the speed change on the Graph? And what does a steeper line mean?
Mandarinka [93]
The steeper the line is (the larger the slope), the faster the speed is.  This is due to the fact that speed=distance/time and the slope=y/x which is distance over time on a distance v time graph.
let me know if you need further explanation by leaving a comment and I hope this helps.
8 0
3 years ago
Tom rolls 2 fair dice and adds the results from each. Work out the probability of getting a total that is a factor of 21.
Ber [7]

The probability of getting a total that is a factor of 21 is 0.22

<u>Explanation:</u>

Factor of 21 is = 1, 3, 7, 21

Out of all the factors of 21, we cannot get 21 when the two die are rolled as the maximum sum that can be obtained is 12

The possible combinations are:

(1,2) (1,6)

(2,1) (2,5)

(3,4)

(4,3)

(5,2)

(6,1)

Total outcome = 6 X 6

                      = 36

Number of outcomes that is the factor of 21 is 8

The probability of getting a total that is a factor of 21 is \frac{8}{36}

p(21) = 0.22

Therefore, the probability of getting a total that is a factor of 21 is 0.22

5 0
3 years ago
The price of a new SMART television was reduced from $250 to $200. By what percentage was the price of the television reduced?
Novosadov [1.4K]

Answer:

20%

Step-by-step explanation:

if the 100% of the price is $250 and the discount is $50 then to find what percent $50 we multiply 100 by 50 then divide it with 250

100 × 50 ÷ 250 = 20

6 0
3 years ago
Find the circumference and area of the circle. Use 3.14 or 22/7 for π.
Hoochie [10]

Answer:

  • circumference: 62.8 ft
  • area: 314 ft²

Step-by-step explanation:

The circumference is given by the formula ...

  C = πd

Using the given numbers, the circumference is ...

  C = (3.14)(20 ft) = 62.8 ft

__

The area is given by the formula ...

  A = πr² . . . . . where radius r is half the diameter

Using the given numbers, the area is ...

  A = 3.14(10 ft)² = 314 ft²

4 0
2 years ago
6 more than the product of a number x and 5 is 21
fgiga [73]

Answer:

x = 3

Step-by-step explanation:

6 <em>+</em><em> </em><em>5</em><em>x</em><em> </em>= 21

<em>5</em><em>x</em><em> </em><em>=</em><em> </em><em>1</em><em>5</em>

<em>x</em><em> </em><em>=</em><em> </em><em>3</em>

I hope this helps

:)

4 0
2 years ago
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