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Juliette [100K]
3 years ago
10

Plz help me on this test

Mathematics
1 answer:
Katen [24]3 years ago
4 0

Answer:

they were neatly planned

Step-by-step explanation:

if you studied you would know they live in a sandy area so it cant be stone and it cant be rivers because there not close to it and a big population that is normal in human society so thats why its they were neatly planned

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I need help asap pls and thank you ;)
olga55 [171]

Answer:

\text{Length of AB is }\frac{ah}{a+h}

Step-by-step explanation:

Given △KMN, ABCD is a square where KN=a, MP⊥KN, MP=h.

we have to find the length of AB.

Let the side of square i.e AB is x units.

As ADCB is a square ⇒ ∠CDN=90°⇒∠CDP=90°

⇒ CP||MP||AB

In ΔMNP and ΔCND

∠NCD=∠NMP     (∵ corresponding angles)

∠NDC=∠NPM     (∵ corresponding angles)

By AA similarity rule,  ΔMNP~ΔCND

Also, ΔKAP~ΔKPM by similarity rule as above.

Hence, corresponding sides are in proportion

\frac{ND}{NP}=\frac{CD}{MP} \thinspace\thinspace and\thinspace\thinspace \frac{KA}{KP}=\frac{AB}{PM} \\\\\frac{ND}{NP}=\frac{x}{h} \thinspace\thinspace and\thinspace\thinspace \frac{KA}{KP}=\frac{x}{h}\\\\\frac{NP}{ND}=\frac{h}{x} \thinspace\thinspace and\thinspace\thinspace \frac{KP}{KA}=\frac{h}{x}\\\\\frac{PD}{ND}=\frac{h}{x}-1 \thinspace\thinspace and\thinspace\thinspace \frac{AP}{KA}=\frac{h}{x}-1\\

KA(\frac{h}{x}-1)=AP

ND(\frac{h}{x}-1)=PD

Adding above two, we get

(KA+ND)(\frac{h}{x}-1)=(AP+PD)

⇒ (KN-AD)=\frac{x}{(\frac{h}{x}-1)}

⇒ a-x=\frac{x}{(\frac{h}{x}-1)}

⇒ a-x=\frac{x^2}{h-x}

⇒ x^2=ah-ax-xh+x^2

⇒ x(h+a)=ah

⇒ x=\frac{ah}{a+h}

3 0
3 years ago
Maria says the mean of the scores 7, 8, 3, 0, 2 is 5, because she added the scores and divided by 4. Is she correct? Explain why
Sergeu [11.5K]

Answer:

She is wrong.

Step-by-step explanation:

The mean score is

7 + 8 + 3 + 0 + 2= 20

We then divide it by the number which is 5

20/5= 4.

Therefore, Maria is wrong.

This is because she divided by 4 instead of 5, as she didn't include the rational number 0.

8 0
2 years ago
Everytime u answer my question correct i will mark u brainlist
OleMash [197]

Answer:

Step-by-step explanation:

15c less than or equal to 200

4 0
3 years ago
Read 2 more answers
First picture is by itself. Next is graph problem :)
monitta

Answer:

1). g(-9) = -81.914

2). Last option

Step-by-step explanation:

1). f(x) = x²

   For x = -9

   f(-9) = (-9)² = 81

   g(x) = \frac{32}{2x-17}

   g(-9) = \frac{32}{[2(-9)-17]}

           = \frac{32}{-35}

           = - \frac{32}{35}    

   (g - f)(-9) = g(-9) - f(-9)

                  = -\frac{32}{35}-81

                  = \frac{-32-2835}{35}

                  = -\frac{2867}{35}

                  = -81.914

2). The relation is not a function because this function doesn't passes a vertical line test.

Last option will be the answer.

5 0
3 years ago
Elijah went to dinner and a school concert for 3 7/12 hours the concert lasted 1 2/3 hours how many hours was dinner?
krek1111 [17]
3 7/12 - 1 2/3 = <span>1.916666... hours
So dinner was 2 hours rounded up.</span>
5 0
2 years ago
Read 2 more answers
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