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3 years ago

No. 4 and 5 . check my answer ? correct me if I'm wrong

Mathematics

1 answer:

My name is Ann [436]3 years ago

4 0

The answer that you have written for 4 and 5 is correct

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the perimeter of a rectangle is 210cm. the ratio of the width to the length is 3:4. what is the length of the rectangle?

sveta [45]

Answer:

length = 60 cm

Step-by-step explanation:

ratio of width : length = 3 : 4 = 3x : 4x

perimeter = (2 × width ) + (2 × length) = 6x +8x = 14x

now perimeter = 210, hence

14x = 210 ( divide both sides by 14 )

x = 15

hence length = 4 × 15 = 60 cm

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4 years ago

When constructing an equilateral triangle by hand, which step comes after constructing a circle?

KonstantinChe [14]

Answer:

set compass to the radius of the circle

Step-by-step explanation: when constructing an equilateral triangle by hand . circle constructing by set compass to the radius of the circle and rotate it and come to the initial point

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3 years ago

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Do 5-7 please I beg you!!!!

mylen [45]

The answer is negative 2

4 0

3 years ago

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Cálculo da equação 5 (x+1)=3 (x-1)

Lana71 [14]

Answer:

x=−4

Step-by-step explanation:

5(x+1)=3(x−1)

5x+5=3(x−1)

3 0

3 years ago

Population Growth

ohaa [14]

Answer:

Step-by-step explanation:

Given that the number of a certain type of bacteria increases continuously at a rate proportional to the number present.

Initial population = 150

Hence equation for population P would be

$P(t) = 150e^{kt}$ where t = time in hours

When t=5, P = 450

Substitute to get

$3 = e^{5k}$

k=0.2197

$P(t) = 150e^{0.2197t}$ is P(t)

P will double when

$300 = 150e^{0.2197t}$

t =3.155

Between 3rd and 4th it would double

c) Yes it doubles when 3.155 hours lapsed from the start time since t in the equation is time lapsed from start time.

6 0

3 years ago