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grigory [225]
3 years ago
9

A small plant is 212 inches tall. How tall will it be in 3 weeks if it grows 34 inch each week? Which method will NOT give the c

orrect number of inches?

Mathematics
2 answers:
Allushta [10]3 years ago
7 0

Answer:

Multiply 2\frac{1}{2} by 3 and then add \frac{3}{4}

Step-by-step explanation:

we know that

using proportion

\frac{(3/4)}{1}\frac{in}{week}=\frac{x}{3}\frac{in}{weeks} \\ \\x=3*(3/4)\\ \\x=9/4\ in

Find the height of the plant in 3 weeks

2\frac{1}{2} +\frac{9}{4}=\frac{5}{2} +\frac{9}{4}\\ \\=\frac{19}{4}\ in

therefore

The incorrect method is

Multiply 2\frac{1}{2} by 3 and then add \frac{3}{4}

because

2\frac{1}{2}*3+\frac{3}{4}=\frac{15}{2}+\frac{3}{4}\\ \\=\frac{33}{4}\ in

Neporo4naja [7]3 years ago
5 0
34*3=102 hope this helps so 102 is the answer please give me brainliest
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