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alex41 [277]
3 years ago
12

Change the improper fraction to a mixed number 62/13 will get 27points

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
6 0
The answer is 4 10/13.
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What two numbers multiply to -40 and add to 10
andreev551 [17]

Answer:

5 + sqrt(65), 5 - sqrt(65)

Step-by-step explanation:

x + y = 10

x×y = -40

so, two equations with 2 variables. using one equation to express one variable by the second. and then using the second equation to solve and calculate the second variable. and then by knowing the second variable we calculate the first.

=> x = 10 - y

=> (10-y)×y = -40

=> -1×(10-y)×y = 40

=> (y-10)×y = 40

=> y^2 - 10×y - 40 = 0

remember the solution for a quadratic equation

a×x^2 + b×x + c

is

x = (-b ± sqrt(b^2 - 4×a×c)/(2×a)

in our case

a = 1

b = -10

c = -40

and we used "y".

so,

y = (--10 ± sqrt((-10)^2 - 4×1×(-40))/(2×1) =

= (10 ± sqrt(100 + 160))/2 = (10 ± sqrt(260))/2 =

= (10 ± sqrt (4×65))/2 = 10/2 ± 2×sqrt(65)/2 =

= 5 ± sqrt(65)

=>

for y = 5 + sqrt(65), x = 10 - 5 - sqrt(65) = 5 - sqrt(65)

for y = 5 - sqrt(65), x = 10 - 5 + sqrt(65) = 5 + sqrt(65)

6 0
2 years ago
How to solve system of equation word problems
Elza [17]
 All you have to do is find the important info and use it and do whatever and all you have to do is take the numbers do the question and ur done :D

8 0
3 years ago
Read 2 more answers
Wizer.me Simplify the following problem: (30 – 3) = 3​
Alex17521 [72]

Answer:

-10/1 is simplified for 30/3

hope this helps

8 0
2 years ago
Good at graphing coordinates? I need some help on that please!
ohaa [14]
Here are the coordinates :)

4 0
2 years ago
A woman takes 12 equal-sized steps. She walks a total of 10 yards
kiruha [24]

Answer:

Each step is 30 inches

Step-by-step explanation: One yard is 36 inches. 10 yards is 360 inches.

360 divided by 12 is 30.

3 0
2 years ago
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