bananarocks06
bananarocks06 bananarocks06
  • 11-05-2019
  • Mathematics
contestada

If a+b = 11 and a−b = 7, then ab

Respuesta :

MohamedSobhy MohamedSobhy
  • 11-05-2019

Answer is..

ab= 18

Explanation..

a + b = 11...---> a= 11-b

a -b = 7

11 - b - b = 7

11 - 2b = 7

2b = 18

b = 9

and a = 11 - 7

a = 2

So

ab = 2 * 9 =18

Answer Link

Otras preguntas

A new tax on property is an example of a(n): input demand symbol output
Explain difference in appearance between a pure substance and a mixture.
which of these sentence segments does not contain a capitalization error? on july 20, 1969, neil armstrong landed the lunar spacecraft, the eagle, on the moon
What is the definition for this word Homo neanderthalensis
if m1 = 50 degrees then m3 is equal to
What event helped soldiers returning from World War II reintegrate into US society?
who is argus and why can't he never be surprised?
In the first stanza of "Life," what does night symbolize? A. death B. anger C. hope D. art
Sara can take no more than 22 pounds of luggage on a trip. Her suitcase weighs 112 ounces. How many more pounds can she pack without going over limit?
You have probably heard of Albert Einstein's famous formula: E = mc2. While this is an important formula that you may use at some point in your academic career,