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gavmur [86]
3 years ago
15

hina travels between the two mile markers shown and then find her average speed in miles per hour. Select the three equations th

at represent this situation
Mathematics
1 answer:
AleksAgata [21]3 years ago
6 0

Answer:

Please rephrase, i cant understand the question

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Plz help will mark brainliest
DENIUS [597]

Answer:

-x^1} \\\\\\Hope that helps!

Step-by-step explanation:

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3 years ago
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
4x ²-1=<br> HELP ME FAST IF ITS RIGHT ILL GIVE YOU BRAINLEIST !!!!!!
snow_tiger [21]

Answer:

(2x+1)(2x−1)

Step-by-step explanation:

5 0
3 years ago
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What does z= ? I need the answer asap, help plsss !
Marrrta [24]

Answer:

51

Step-by-step explanation:

tan(z) = 10/8

z = (tan^-1)(1.25)

z = 51.3401917459

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3 years ago
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What percent of 520 is 40? round to the nearest hundredth of a percent.
JulijaS [17]

Answer:

7.6923%

Step-by-step explanation:

Let y% be the percent of 520.

520y = 40

y = 0.076923...

y = 7.6923%

3 0
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