The rate at which his pulse is increasing after 3 minutes is 9.5 beats per minute
<h3>How to determine the beat rate after 3 minutes?</h3>
The given graph shows the curve and the tangent.
From tangent line, we have the following points:
(x,y) = (3,119) and (1,100)
The beat rate (m) at this point is:

So, we have:

Evaluate the differences

Evaluate the quotient
m = 9.5
Hence, the rate at which Sam's pulse is increasing after 3 minutes is 9.5 beats per minute
Read more about rates of tangent lines at:
brainly.com/question/6617153
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Step 2...first error...when distributing through the parenthesis, u multiply, not add.
4(2x - 4) = 8 + 2x + 8 =
8x - 16 = 16 + 2x <== correction
Not 100% sure this is correct but this seems correct.
2v=3-7
2v=-4 divide both sides
v=-2
Answer:
0.9 dm³
Step-by-step explanation:
1 dm = 10cm
1 dm³ = 10cm×10cm×10cm = 1000 cm³
1000 cm³ .............. 1 dm³
900 cm³ ................x dm³
x = 900×1/1000 = 0.9 dm³