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kotykmax [81]
3 years ago
12

A marina is in the shape of a coordinate grid. Boat A is docked at (3.1, −1) and Boat B is docked at (−4.1, −1). The boats are _

___ units apart.
A: 5.1
B: 7.2
C: 8.1
D: 8.2
Mathematics
2 answers:
Bingel [31]3 years ago
7 0
B...................
charle [14.2K]3 years ago
7 0

Answer:

B: 7.2

Step be step explanation:

We are told that a marina is in the shape of a coordinate grid. Boat A is docked at (3.1, −1) and Boat B is docked at (−4.1, −1).

To find difference of units between two boats we will use distance formula.

D=\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}

Upon substituting our given values in distance formula we will get,

D=\sqrt{(3.1--4.1)^{2}+(-1--1)^{2}}

D=\sqrt{(3.1+4.1)^{2}+(-1+1)^{2}}

D=\sqrt{(7.2)^{2}+(0)^{2}}

D=\sqrt{(7.2)^{2}}

D=7.2

Therefore, the boats are 7.2 units apart and option B is the correct choice.  

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aev [14]

Answer:

The number of men was 80

The number of women was 70

Step-by-step explanation:

The question in English is

Having organized a bingo has raised $1900. For the entrance of men $15 and women $10 and an attendance of 150 people has been reported. Determine the number of men and the number of women who participated in the bingo.

Let

x----> the number of men

y----> the number of women

we know that

x+y=150

x=150-y -----> equation A

15x+10y=1,900 -----> equation B

substitute equation A in equation B and solve for y

15(150-y)+10y=1,900

2,250-15y+10y=1,900

15y-10y=2,250-1,900

5y=350

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Find the value of x

x=150-70=80

therefore

The number of men was 80

The number of women was 70

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3 years ago
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Answer:

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Step-by-step explanation:

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Then do order of operations to simplify PEMDAS

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