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3 years ago

Whats the answer to this question

Mathematics

1 answer:

sergiy2304 [10]3 years ago

3 0

Do 55 +55 which equals 110

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Which of the following equations was used to graph the line shown?

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3 years ago

Kelka's family drove to Long Island. They drove 1 1/2 hours to get there. The return trip only took 3/4 of the time of the origi

Anton [14]

The trip was 6 hours long.

Step-by-step explanation:

Given,

The time to go to the island = 1 $\frac{1}{2}$ hours.

The return trip took 3/4 of the time of the original trip.

To find the time of the trip.

Let,

The time of the original trip is x hours.

The time for returning = $\frac{3x}{4}$

According to the problem,

1 $\frac{1}{2}$ + $\frac{3x}{4}$ = x

or, x - $\frac{3x}{4}$ = $\frac{3}{2}$

or, $\frac{x}{4}$ = $\frac{3}{2}$

or, x = $\frac{3}{2}$ ×4 = 6 hours

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The trip was 6 hours long.

6 0

3 years ago

To find the distance AB across a river, a surveyor laid off a distance BC=361 m on one side of the river. It is found that B=111

zhannawk [14.2K]

Answer:

91.87m

Step-by-step explanation:

We are given that

BC=361 m

Angle B= $111^{\circ}20'=111+\frac{20}{60}=111.33^{\circ}$

1 degree= 60 minute

Angle C= $12^{\circ} 15'=12+\frac{15}{60}=12.25^{\circ}$

We have to find the value of AB.

Sum of angles of triangle=180 degrees

$\angle A+\angle B+\angle C=180$

$\angle A=180-(\angle C+\angle B)=180-(111.33+12.25)=56.42^{\circ}$

By using law of sine

$\frac{AB}{sin C}=\frac{BC}{sin A}$

$AB=\frac{BCsin C}{sin A}=\frac{361 sin 12.25^{\circ}}{sin 56.42^{\circ}}$

$AB=91.87 m$

7 0

4 years ago