Simplify: (2x2 − 9x + 3) + (−7x2 + 4x − 2)
1 answer:
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The volume of a cuboid is = length × width × height.
Let the width of Olivia's lunch box be 'x'.
Hence the length of Olivia's lunch box shall be 'x + 2'
Also the height of the box is given as 3 inches.
The volume of the box is 240 in³
Substituting in the formula we get
Dividing by 3 on both sides
Exapnding we get
Subtracting 80 from both sides
Factoring
We get
x= -10 or x = 8
But x cannot be negative
So x = 8
Hence the width of the box is 8 inches.
Answer:
Step-by-step explanation:
Heart rate will be represented by , minutes will be represented by
.
Here's the equation I came up with:
We can also rearrange it to look like a point-slope equation. Either way works, it's the same equation.
This works because her heart rate is decreasing by a constant value. The initial heart rate is like the y-intercept, while the amount that it decreases by is the slope.
I hope this helps!