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2 years ago

X^2-2x+15 in quadratic equation

Mathematics

1 answer:

Arturiano [62]2 years ago

3 0

Answer:

No solution

Step-by-step explanation:

There is not a real nor an imaginary solution to this equation. You can use a radical calculator to verify.

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Two lighthouses are located 60 miles from one another on a north-south line. If a boat is spotted S 21o E from the northern ligh

jasenka [17]

Answer:

(A)The northern lighthouse is 8.2 miles closer than the southern lighthouse.

Step-by-step explanation:

The triangle attached represents the given problem.

First, let us determine the distance of the Boat from each of the lighthouse.

In Triangle ABC,

∠A+∠B+∠C=180 degrees

21+∠B+16=180

∠B=180-37=143 degrees.

Using Law of Sines

$\frac{a}{Sin A}=\frac{b}{Sin B}\\\frac{a}{Sin 21^0}=\frac{60}{Sin 143^0} \\\text{Cross Multiply}\\a*sin143=60*sin21\\a=60*sin21\div sin143\\a=35.73 miles$

Similarly

$\frac{c}{Sin C}=\frac{b}{Sin B}\\\frac{c}{Sin 16^0}=\frac{60}{Sin 143^0} \\\text{Cross Multiply}\\c*sin143=60*sin16\\c=60*sin16\div sin143\\c=27.48 miles$

Difference in Distance =35.73-27.48=8.25 miles

Therefore, the northern lighthouse is 8.2 miles closer than the southern lighthouse.

8 0

3 years ago

Find the missing length of the missing side. If necessary, round to the nearest tenth

allsm [11]

.................................38

7 0

3 years ago

Solving equations <br><br> -2(x + 3)=3(2x-10)

nika2105 [10]

Answer:

x=3

Step-by-step explanation:

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2 years ago

The sum of the measures of angle A and angle B equal 90 degrees. What is cos B

stira [4]

Answer:I think it is 12/25

Step-by-step explanation:

4 0

3 years ago

Which pair of slopes represent perpendicular lines?

Artist 52 [7]

The correct answer is C.

Perpendicular lines have opposite reciprocal slopes. This mean you will flip the original number upside down, and change its sign (negative to positive and vice versa). So, the opposite of -1/4 will be 4.

3 0

3 years ago

X^2-2x+15 in quadratic equation​

X^2-2x+15 in quadratic equation