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2 years ago

Think of a number, double the number,

Mathematics

1 answer:

Rashid [163]2 years ago

5 0

Answer:

Let x be the number

double x = 2 x

square the result (2x)^2

(2x)^2 - x subtract the original number

4 x^2 - x = 33

4 x^2 - x - 33 = 0

Solve the quadratic

(1 +- (1 + 4 * 132)^1/2) / 8

= (1 + 528^1/2) / 8 = (1 + 23) / 8 = 3 using the positive exponent

Check:

(2 * 3)^2 - 3 = 36 - 3 = 33

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Assume that all triangles have interior angles less than 90°.A surveyor sights on a survey marker that is 132.3m distant. She ne

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Answer:

85.9 m

Step-by-step explanation:

The law of sines can help figure this.

The remaining angle in the triangle is ...

180° -75° -68° = 37°

This is the angle opposite the leg from the surveyor to the second marker. Referencing the attachment, we have ...

b/sin(B) = c/sin(C)

b = sin(B)·c/sin(C) = 132.3·sin(37°)/sin(68°) ≈ 85.873 . . . meters

The surveyor is about 85.9 meters from the second marker.

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3 years ago

In a population, 93% of the people are right-handed, and 7% of the people are left-handed. In each of the last 100 days, 1 perso

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The answer is 93%... Pretty sure.

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3 years ago

Read 2 more answers

For each of the following determine a unit rate using the information given. Show the division that leads to your answer. Use ap

dimulka [17.4K]

Answer:

Step-by-step explanation:

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3 years ago

What binomial do you have to add to the polynomial:

marshall27 [118]

Answer:

a) $-2x^2+5xy$

b) $-3y^2+5xy$

Step-by-step explanation:

Given polynomial : $2x^2+3y^2-5xy+1$

The binomial that should be added to the given polynomial to get a polynomial that does not contain the variable x is:

$-2x^2+5xy$

$(2x^2+3y^2-5xy+1)+(-2x^2+5xy)$

$=2x^2+3y^2-5xy+1-2x^2+5xy$

$=2x^2-2x^2+3y^2-5xy+5xy+1$

$=3y^2+1$

Given polynomial : $2x^2+3y^2-5xy+1$

The binomial that should be added to the given polynomial to get a polynomial that does not contain the variable y is:

$-3y^2+5xy$

$(2x^2+3y^2-5xy+1)+(-3y^2+5xy)$

$=2x^2+3y^2-5xy+1-3y^2+5xy$

$=2x^2+3y^2-3y^2-5xy+5xy+1$

$=2x^2+1$

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2 years ago

Students are voting on a color T-shirt to wear on there field trip. There are 160 students-65 boys and 95 girls-going on the fie

densk [106]

Yeah ok so what’s the question

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3 years ago