If a square+ b square+ c square=90, a+b+c=20 find the value of ab+bc+ca
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Answer: see below
<u>Step-by-step explanation:</u>
Write each equation in y = mx + b format where m is the slope and b is the y-intercept.
Left side: -4 ≤ x < -1
If you continue the line through the y-axis it will pass through (0, 4) --> b = 4
The rise over run is -1 over 1 --> m = -1
y = (-1)x + (4) --> y = -x + 4
Right side: -1 < x < 4
The line passes through (0,0) --> b = 0.
The rise over run is -1 over 1 --> m = -1
y = (-1)x + (0) --> y = -x
The probability is found from a suitable table or probability calculator.
p(z < 1.3) ≈ 0.9031995154
p(z < 1.3) ≈ 0.9031995154