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3 years ago

Helpsolve question A and BI really appreciate it... I will mark as brainliest

Mathematics

2 answers:

Arada [10]3 years ago

7 0

Answer:

9/4= x/8 = x = 9x8/4= 18

18+4= 22

lina2011 [118]3 years ago

6 0

A 2:4

B 4:6:12

C 0.6:2.4

Distance from school to shop is 12 km

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Find the equation of all tangent lines having slope of -1 that are tangent to the curve y=(9)/(x+1)

fredd [130]

Answer:

$f(x)=\frac9{x+1}\\ f'(x)=-\frac9{(x+1)^2}\\ f'(x)=-1\ \iff\ -\frac9{(x+1)^2}=-1\ \to \ \frac9{(x+1)^2}=1\ \to \ (x+1)^2=9\\ |x+1|=3\ \to \ x+1=3\ \vee\ x+1=-3\\ x_1=2\ \vee\ x_2=-4\\ f(x_1)=f(2)=\frac9{2+1}=3\\ f(x_2)=f(-4)=\frac9{-4+1}=-3$

First tangent line:

$y=f'(x_1)\cdot (x-x_1)+f(x_1)\ \to \ y=-1(x-2)+3\ \to \ y=-x+5$

Second tangent line:

$y=f'(x_2)\cdot (x-x_2)+f(x_2)\ \to \ y=-1(x+4)-3\ \to \ y=-x-7$

Notice: slope of -1 means that both $f'(x_1), \ f'(x_2)$ are equal to -1, so $f'(x_1)=-1 \ and \ f'(x_2)=-1$

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3 years ago

Read 2 more answers

Which expression gives the distance between the points

Anna35 [415]

Answer:

D. √((2 +4)² +(5 -8)²)

Step-by-step explanation:

The distance is found using the formula ...

d = √((x1 -x2)² +(y1 -y2)²)

Selection D has this formula properly filled in with the values ...

(x1, y1) = (2, 5)

(x2, y2) = (-4, 8)

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3 years ago

What is the least 10-digit whole number?

Murljashka [212]

1000000000 because less than this number is 9 digits and more than this numbet is not least

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3 years ago

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3 years ago

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Lorico [155]

The answer to this is C

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3 years ago

Helpsolve question A and BI really appreciate it... I will mark as brainliest​

Helpsolve question A and BI really appreciate it... I will mark as brainliest