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3 years ago

The sum of two numbers is 19, and their difference is 55. What are the two numbers?

Mathematics

1 answer:

Vilka [71]3 years ago

5 0

Answer:

37 and -18

Step-by-step explanation:

Let one number be x and other y

1 x + 1 y = 19 .............1

1 x -1 y = 55 .............2

Eliminate y

multiply (1)by 1

Multiply (2) by 1

1 x 1 y = 19

1 x + -1 y = 55

Add the two equations

2 x = 74

/ 2

x = 37

plug value of x in (1)

1 x + 1 y = 19

37 + 1 y = 19

1 y = 19 -37

1 y = -18

y = -18

37 and -18

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3 years ago

The value of a car reduces by 30% every 6 months. A car costs $15,000 when new. What is the value of the car after 2 years?

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3 years ago

If the length of a leg of a triangle is 39.2 and the area of the triangle is 63 what is the length of the other leg

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Answer:

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Step-by-step explanation:

I will assume that the triangle is a right triangle

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substitute the values

$63=\frac{1}{2}(39.2)(b)$

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