Sean spent $38 for shorts. This was $4 less than twice what he spent for a shirt. The equation 2x − 4 = 38 can be used to find t
2 answers:
Answer: B) $21
Step-by-step explanation:
Given : Sean spent $38 for shorts.
This was $4 less than twice what he spent for a shirt.
Let x denotes the cost of shirt.
The equation is set to find the cost of the shirt (x).
To solve the above equation for x , first we add4 on both the sides , we get
Divide both sides by 2 , we get
Thus , the cos of shirt = $21
Hence, Sean spent $21 on the shirt.
∴ The correct option is B) $21
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You are given (time, depth) pairs of (20 s, 8 cm) and (40 s, 0 cm) and asked to write an equation that describes the relationship of depth (y) to time (x).
The rate of change is (0 cm -8 cm)/(40 s -20 s) = -8 cm/(20 s) = -2/5 cm/s. Then in point-slope form using the second point, the linear function rule is
y = (-2/5)(x -40) +0
You can expand this to
y = (-2/5)x +16
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If the bathtubs in your "draining race" start with the same level, the one with the steepest slope (-0.5 cm/s) will win.