I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.
Your answer is B. It can reproduce quickly. I took a test that had this question and I got this one right. Please mark brainliest.
Answer:
Subtract 4x4x from both sides of the equation.
y=16−4xy=16-4x
2x+3y=−22x+3y=-2
Replace all occurrences of yy in 2x+3y=−22x+3y=-2 with 16−4x16-4x.
y=16−4xy=16-4x
2x+3(16−4x)=−22x+3(16-4x)=-2
Simplify 2x+3(16−4x)2x+3(16-4x).
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y=16−4xy=16-4x
−10x+48=−2-10x+48=-2
Solve for xx in the second equation.
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y=16−4xy=16-4x
x=5x=5
Replace all occurrences of xx in y=16−4xy=16-4x with 55.
y=16−4⋅5y=16-4⋅5
x=5x=5
Simplify 16−4⋅516-4⋅5.
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y=−4y=-4
x=5x=5
The solution to the system of equations can be represented as a point.
(5,−4)(5,-4)
The result can be shown in multiple forms.
Point Form:
(5,−4)(5,-4)
Equation Form:
x=5,y=−4x=5,y=-4

4x+y=16,2x+3y=−24x+y=16,2x+3y=-2
