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Evgesh-ka [11]
3 years ago
15

HELLLLLLP PLEASE CAN SOMEONE PLEASE EXPLAIN?

Mathematics
1 answer:
harina [27]3 years ago
5 0

Answer:

ABCD is a RHOMBUS or a SQUARE.

Step-by-step explanation:

The coordinates are A(-6, 6), B(-2, 8), C(0, 4), and D(-4, 2).

By DISTANCE FORMULA:

The length of the segment with coordinates X(a,b) and Y(c,d) is given as:

XY = \sqrt{(c-a)^2  + (d-b)^2}

Now, similarly, the lengths of the segments are:

AB = \sqrt{(-2 -(-6))^2  + (8-6)^2}

=\sqrt{(4)^2  + (2)^2}  = \sqrt{16 + 4}   = \sqrt{20}

⇒ The length of the segment AB = √ 20 units

BC = \sqrt{(0 -(-2))^2  + (4-8)^2}

=\sqrt{(2)^2  + (-4)^2}  = \sqrt{4 + 16}   = \sqrt{20}

⇒ The length of the segment BC = √ 20 units

CD = \sqrt{(0 -(-4))^2  + (2-4)^2}

=\sqrt{(4)^2  + (-2)^2}  = \sqrt{16 + 4}   = \sqrt{20}

⇒ The length of the segment CD= √ 20 units

AD = \sqrt{(-6 -(-4))^2  + (6-2)^2}

=\sqrt{(-2)^2  + (4)^2}  = \sqrt{4 + 16}   = \sqrt{20}

⇒ The length of the segment AD = √ 20 units

AC = \sqrt{(0 -(-6))^2  + (4-6)^2}

=\sqrt{(6)^2  + (-2)^2}  = \sqrt{36 + 4}   = \sqrt{40}

⇒ The length of the diagonal AC = √ 40 units

BD = \sqrt{(-2 +4)^2  + (8-2)^2}

=\sqrt{(2)^2  + (6)^2}  = \sqrt{36 + 4}   = \sqrt{40}

⇒ The length of the diagonal BD = √ 40 units

Since, here the length of all segments is √ 20 units.

⇒AB = BC = CD = AD = √ 20 units

and Diagonal AC = BD

⇒ ABCD is a RHOMBUS or SQUARE.

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What solution is this w = 10
alina1380 [7]

Answer:

w = 10

Step-by-step explanation:

9(w - 9) -2 = -7 + 7(w -8)

Expand:

9w - 81 - 2 = -7 + 7w - 56

Rearrange:

9w - 7w = -7 - 56 + 81 + 2

2w = 20

w = 10  

3 0
3 years ago
Allison bought jelly beans to share with her friends. She bought pounds of blueberry jelly beans and pounds of lemon jelly beans
Vaselesa [24]

Answer: 1\dfrac{11}{12}\text{ pounds}

Step-by-step explanation:

The complete question is provided in the attachment.

Given, Amount blueberry jelly beans= 1\dfrac{1}{4} pounds

=\dfrac{5}{4} pounds.

Amount lemon jelly beans = 2\dfrac{1}{3}pounds

=\dfrac{7}{2} pounds

Total jelly beans she bought = Amount blueberry jelly beans + Amount lemon jelly beans

=(\dfrac{5}{4}+\dfrac{7}{3}) pounds

=\frac{15+28}{12}\text{ pounds}\\\\=\dfrac{43}{12}\text{ pounds}

Amount of jelly beans she gave away = 1\dfrac{2}{3}=\dfrac{5}{3}\text{ pounds}

Amount of jelly beans she has left= Total jelly beans - Amount of jelly beans she gave away

=\dfrac{43}{12}-\dfrac{5}{3}\\\\=\dfrac{43-20}{12}\\\\=\dfrac{23}{12}\\\\=1\dfrac{11}{12}\text{ pounds}

She has left 1\dfrac{11}{12}\text{ pounds} of jelly beans.

6 0
3 years ago
NEED HELP!!! Can someone help me with 5, 7, and 8??? <br> Need this asap!!!<br> THANK YOU!!!
Serjik [45]

Answer:

5) 8/17 = .471

7) 8/17 = .471

8) 15/17 = .88

Step-by-step explanation:

hope that helps

6 0
3 years ago
Read 2 more answers
A right circular cylinder with a radius of 2.3cm and a height of 1.4cm has a total surface area of ​
likoan [24]

Answer:

i think 6.44

Step-by-step explanation:

first the diameter is 4.6 then multiply the 4.6 with 1.4 and u obtaine 6.44 (note:iam not sure iam still in seven grade)

4 0
2 years ago
Given: ∆ABC, AC = 12,<br> AB = BC = 10<br> Find: m∠A, m∠C, m∠B
4vir4ik [10]

Answer:

  • m∠A ≈ 53.13°
  • m∠B ≈ 73.74°
  • m∠C ≈ 53.13°

Step-by-step explanation:

An altitude to AC bisects it and creates two congruent right triangles. This lets you find ∠A = ∠C = arccos(6/10) ≈ 53.13°.

Since the sum of angles of a triangle is 180°, ∠B is the supplement of twice this angle, so is about 73.74°.

  m∠A = m∠C ≈ 53.13°

  m∠B ≈ 73.74°

_____

The mnemonic SOH CAH TOA reminds you of the relation between the adjacent side, hypotenuse, and trig function of an angle:

  Cos = Adjacent/Hypotenuse

If the altitude from B bisects AC at X, triangle AXB is a right triangle with side AX adjacent to the angle A, and side AB as the hypotenuse. AX is half of AC, so has length 12/2 = 6, telling you the cosine of angle A is AX/AB = 6/10.

A diagram does not have to be sophisticated to be useful.

3 0
3 years ago
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