Mathematics, 25.09.2019 06:10 XAINEE

What is the y-value of the solution to the system of equations?
3х + 5y = 1
7х + 4у = -13
от му

Answers

Answer from: Quest

look at the picture.

$efgh\sim abcd\to2: 3$

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

$6: 3x=2: 3\to\dfrac{6}{3x}=\dfrac{2}{3}\to\dfrac{2}{x}=\dfrac{2}{3}\to2x=(2)(3)\to x=3$

use pythagorean theorem:

$a^2=8^2+(2\cdot3)^2\\\\a^2=64+36\\\\a^2=100\to a=\sqrt{100}\to a=10\ cm$

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

$p_{efgh}: p_{abcd}=2: 3\to\dfrac{p_{efgh}}{p_{abcd}}=\dfrac{2}{3}$

substitute:

$\dfrac{p_{efgh}}{30}=\dfrac{2}{3}$ cross multiply

$3p_{efgh}=(30)(2)$ divide both sides by 3

$p_{efgh}=20\ cm$

$p_{abcd}=30\ cm\\\\p_{efgh}=20\ cm$

Answer from: Quest

x< -17/2 hope this

Answer from: Quest

answer: that means that there is to perpendicular

step-by-step explanation:

Answer from: Quest

step-by-step explanation:

1. a.) 2

2. d.) the function has three real zeros. the graph of the function intersects the x-axis at exactly three locations.

3. a.) 3

4. c.) f(x) + (x+2)()(- ))

(5.)

1.) x = -3

2.)x = 4

3.) x = -4

Correct answer only ! i cannot retake how many complex roots does the equation 0 = 3x^5 − x4− 5x^2

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 14:00, versaceblooper

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Answers: 1

continue

Mathematics, 21.06.2019 18:00, nativebabydoll35

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given

Answers: 1

continue

Mathematics, 21.06.2019 19:00, EMQPWE

What is the percentile for data value 6 in the following data set? 4 13 8 6 4 4 13 6 4 13 2 13 15 5 9 4 12 8 6 13 40 25 35 62

Answers: 2

continue

Mathematics, 22.06.2019 07:20, davidgarcia522083

Which is the absolute value function corresponding to the graph with these characteristics? vertex is at (-2, k) v-shaped graph opens in the downward direction coefficient a is 4 left arm passes through point (-3, -1)

Answers: 3

continue

You know the right answer?

What is the y-value of the solution to the system of equations?
3х + 5y = 1
7х + 4у = -...