Answer:
(-2,-4)
Step-by-step explanation:
The given system is
Add both equations to eliminate y
Simplify both sides to get:
Divide both sides by 2
Put x=-2 into one of the equations say, x+y=-6 and solve for y
The solution is (-2,-4)
Answer:
-4,-5
Step-by-step explanation:
first set the equation equal to 0, v^2+9v+20, factor v^2+4v+5v+20, v(v+4) 5(v+4), so the 2 factors are (v+5) and (v+4), set both equal to that 0. v+5=0 v=-5 and v+4=0 v=-4, so the answer is -4 and -5
She needs 750 meters because 1,000 x .75 is 750 i thinkk
P(x<4600) will be obtained as follows:
z-score is given by:
z=(x-μ)/σ
where:
μ-mean
σ-standard deviation
plugging the values in the equation we get:
z=(4600-4500)/110
z=0.91
thus
P(x<4600)=P(z<0.91)=0.8186