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3 years ago

Chloe grew 12 plants with 6 seed packets. With 9 seed packets, how many total plants can Chloe have in her backyard?

Mathematics

2 answers:

Naily [24]3 years ago

7 0

la respuesta es:18

solo tienes que ir contando de 2 en 2 hasta llegar a 9 por ejemplo 2,4,6,8,10,12,14,16,18

Butoxors [25]3 years ago

6 0

Answer:

18 plants

Step-by-step explanation:

$6seed \: packets \: 12pants \\ 1seed \: packet \: \frac{12}{6} plants \\ 9seed \: packets \: \frac{12}{6} \times 9 \\ = 2 \times 9 \\ = 18plants$

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3 years ago

Prove the following statement using a proof by contraposition. Yr EQ,s ER, if s is irrational, then r + 1 is irrational.

sp2606 [1]

Answer:

I think that what you are trying to show is: If $s$ is irrational and $r$ is rational, then $r+s$ is rational. If so, a proof can be as follows:

Step-by-step explanation:

Suppose that $r+s$ is a rational number. Then $r$ and $r+s$ can be written as follows

$r=\frac{p_{1}}{q_{1}}, \,p_{1}\in \mathbb{Z}, q_{1}\in \mathbb{Z}, q_{1}\neq 0$

$r+s=\frac{p_{2}}{q_{2}}, \,p_{2}\in \mathbb{Z}, q_{2}\in \mathbb{Z}, q_{2}\neq 0$

Hence we have that

$r+s=\frac{p_{1}}{q_{1}}+s=\frac{p_{2}}{q_{2}}$

Then

$s=\frac{p_{2}}{q_{2}}-\frac{p_{1}}{q_{1}}=\frac{p_{2}q_{1}-p_{1}q_{2}}{q_{1}q_{2}}\in \mathbb{Q}$

This is a contradiction because we assumed that $s$ is an irrational number.

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3 years ago

The elevator of a high-rise office building provides access to all floors. if each floor is 5 meters high and the elevator trave

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Height of each floor = 5 meters
time to travel from the first floor to 68th floor = ?
Speed of elevator = 7.5m/s
While an elevator travels from 1st floor to 68th floor, we will multiply the height of floor with 67 to get the distance covered by the elevator form 1st floor to 68th floor, the height of 68th floor will not be counted in the distance because an elevator reaches the 68th floor not covered the height of that floor.
Distance = 5 x 67 = 335m
Now calculate the time by using the formula;
time = distance / speed
= 335m / 7.5m/s
= 44.667 seconds
Thus, an elevator will take 44.667 seconds to reach 68th floor.

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3 years ago