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mart [117]
4 years ago
11

Please help me. I need help please.

Mathematics
1 answer:
Mice21 [21]4 years ago
7 0

Answer:

The correct options are;

EFGH has 4 congruent sides

Diagonal FH bisects angles EFG and EHG

Angle FEH is congruent to angle FGH

Step-by-step explanation:

1) Given that for a reflection, we have;

The distance of the reflected preimage from the line of reflection = The distance of the reflected image from the line of reflection

Therefore;

The distance of the point E from the line HF = The distance of the point G from the line HF

Also the reflection of an preimage (x, y) about the x-axis, gives an image (x, -y)

We can show that from the length of a line given by the equationl = \sqrt{\left (y_{2}-y_{1}  \right )^{2}+\left (x_{2}-x_{1}  \right )^{2}}, that the length EH ≅ GH and EF ≅ GF

Therefore since we are given that EH = EF, we have;

EH = GH = GF = EF by the definition of congruency, which gives 4 congruent sides

2) Given that EH = GH = GF = EF and HF = FH by reflective property, we have;

ΔEHF ≅ ΔGHF

∴ ∠GHF ≅ ∠EHF by Congruent Parts of Congruent Triangles are Congruent

Similarly, ∠GFH ≅ ∠EFH

Therefore, ∠GFH = ∠EFH and ∠GHF = ∠EHF

Therefore, diagonal FH bisects angles EFG and EHG

3) Given that ΔEHF ≅ ΔGHF, we have;

Angle FEH is congruent to angle FGH, by Congruent Parts of Congruent Triangles are Congruent

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On weekdays, Kiki walks 2 miles in the morning and 1 mile in the evening On Saturdays, she walks 4 miles.
love history [14]

Answer:

5(2+1)+4

Step-by-step explanation:

3 0
3 years ago
Given lines a and b are parallel, and m<1 = 50, Find m<4
kirill115 [55]
M1 = m4 = 50 (A) is the answer
6 0
3 years ago
Consider the following sets of sample data: A: $30,500, $27,500, $31,200, $24,000, $27,100, $28,600, $39,100, $36,900, $35,000,
Alecsey [184]

Answer:

CV=0.2 ---- dataset 1

CV = 7.2 --- dataset 2

Step-by-step explanation:

Given

A: 30500, 27500, 31200, 24000, 27100,28600, 39100, 36900, 35000, 21400, 37900, 27900, 18700,33100

B: 4.29, 4.88, 4.34, 4.17, 4.52, 4.80, 3.28, 3.79, 4.84, 4.77, 3.11

Required

The coefficient of variation of each

<u>Dataset A</u>

Calculate the mean

\mu = \frac{\sum x}{n}

\mu = \frac{30500+ 27500+31200+24000+ 27100+28600+ 39100+ 36900+ 35000+ 21400+ 37900+ 27900+ 18700+33100}{14}\mu = \frac{418900}{14}

\mu = 29921.43

Next, calculate the standard deviation using:

\sigma = \sqrt{\frac{\sum(x - \mu)^2}{n}}

So, we have:

\sigma= \sqrt{\frac{(30500 - 29921.43)^2 +.................+ (18700- 29921.43)^2 + (33100- 29921.43)^2}{13}}

\sigma= \sqrt{\frac{487723571.42857}{14}}

\sigma= \sqrt{34837397.959184}

\sigma= 5902.32

So, the coefficient of variation is:

CV=\frac{\sigma}{\mu}

CV=\frac{5902.32}{29921.43}

CV=0.2 --- approximated

<u>Dataset B</u>

Calculate the mean

\mu = \frac{\sum x}{n}

\mu = \frac{4.29+ 4.88+ 4.34+ 4.17+ 4.52+ 4.80+ 3.28+ 3.79+ 4.84+ 4.77+ 3.11}{11}

\mu = \frac{46.79}{11}

\mu = 4.25

Next, calculate the standard deviation using:

\sigma = \sqrt{\frac{\sum(x - \mu)^2}{n}}

\sigma = \sqrt{\frac{(4.29 - 4.25)^2 + (4.88- 4.25)^2 +.........+ (3.11- 4.25)^2}{11}}

\sigma = \sqrt{\frac{3.859}{11}}

\sigma = \sqrt{0.35081818181}

\sigma = 0.593

So, the coefficient of variation is:

CV=\frac{\sigma}{\mu}

CV = \frac{4.25}{0.5903}

CV = 7.2 -- approximated

3 0
3 years ago
Another annoying question. Please help me.
Volgvan

Answer:

1.15b

b + 0.15b

b + (15/100)b

Step-by-step explanation:

Since the question asks for the equation that represents the pay plus the tip, which is 15% of the bill, your only answer choices are:

1.15b

b + 0.15b

b + (15/100)b

Why?

Ok, <em>b </em>is the bill in dollars. If I have to pay 15 dollars and I tip 15% of that, then I should be paying more than 15 dollars. In this example I gave, <em>b </em>is 15 dollars.

15% of b can be expressed in two ways (there's more but for now) : 0.15b or (15/100)b

15/100 is a fraction, which in decimal form is 0.15, so they are both exactly the same.

So, paying 15 dollars + 15% of the 15 will be 17.25.

Now, let's plug 15 dollars from our example in the answer choices to verify they are correct

<em>b = 15</em>

1.15b == 17.25

1.15(15) == 17.25

17.25 == 17.25  Correct

b + 0.15b == 17.25

15 + 0.15(15) == 17.25

15 + 2.25 == 17.25

17.25 == 17.25

<em>There is another way of doing the above.</em>

b + 0.15b == 17.25    # Combine like terms.

1.15b == 17.25

And then, b + (15/100)b is the same as b + 0.15b which is the same as 1.15b

Now, let's see what happens if we did a wrong one.

b + 0.15 <-- This one we expect <em>b </em>which is 15 and adding .15 cents no matter the cost

15 + 0.15 == 17.25

15.15 ≠ 17.25

1.015b <-- 0.015 in percent form is 1.5% not 15%.

1.015(15) == 17.25

15.225 ≠ 17.25

15b <-- We are multiplying b by 15. You better know your math otherwise you might pay 15x what you were supposed to pay!

15(15) == 17.25

225 ≠ 17.25

If you want to test out your equations, replace the variable; whether it is x, y, z, a, b, c - they are placeholders. Replace the placeholder with real values or equations (you will experience later).

8 0
3 years ago
A man repays a loan of ₹65000 by paying ₹400 in the first month and then increasing the payment by ₹ 300 every month how long it
White raven [17]

dude r u dumb hahahahhahaha lol

8 0
3 years ago
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