3 years ago

Help !!! ..............

1 answer:

7 0

The second one is the answer, apply distance formula you get the distance between (-2,0) and (1,sqrt(7)) is 4, means the point lies on the circle

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5. The students are trying to determine the distance between two particular

natali 33 [55]

Answer:

The actual distance between the cities is 211.67 cm.

Step-by-step explanation:

Given:

The map key indicates that 4.5 cm is equivalent to 75 cm.

Now, to find the actual distance between the cities if the cities are 12.7 cm apart on the map.

Let the actual distance be $x$ .

So, we set a proportion to find the actual distance:

4.5:12.7 = 75:x.

Changing into fractions.

$\frac{4.5}{12.7} =\frac{75}{x}$

By cross multiplication we get:

$4.5x=952.5$

Dividing both sides by 4.5 we get:

$x=211.67$

Therefore, the actual distance between the cities is 211.67 cm.

8 0

3 years ago

A population of bacteria is initially 2,000. After three hours the population is 1,000.

lina2011 [118]

The population starts at 2000, so a=2000.

We also know that the population in 3 hours is 1000, so we can setup the equation:

2000 b^3 = 1000

This gets us:

b^3 = 1/2

And taking the cube root of both sides gives us:

b ≈ 0.7937005259841

Rounding that to 4 places, we have:

f(t) = 2000 (0.7937)^t

5 0

3 years ago

2(n+5)=-2 step by step plz

Elodia [21]

Answer:

n=-6

Step-by-step explanation:

2(n+5)=-2

distribute

2(n+5)

2xn 2x5

2n+10

2n+10=-2

subtract 10 from both sides

10-10=0

-2-10=-12

2n=-12

divide each side by 2

2n/2=n

-12/2=-6

n=-6

6 0

3 years ago

J= 6 for 15 - j= 21 What’s the answer

Ann [662]

Answer:

15+6=21

15-(-6) = 21

5 0

3 years ago

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Which value is equivalent to 12 + 24 ÷ 3? A) 8 B) 12 C) 20 D) 36

Montano1993 [528]

Answer:

c.20

Step-by-step explanation:

first step:24÷3=8

final step: 12+8=20

5 0

3 years ago

Read 2 more answers