I need help with number 4

Mathematics

2 answers:

Elza [17]3 years ago

6 0

Answer:

d. BC=30

Step-by-step explanation:

triangle ABC is cut by a diagnal AD into two equal triangles .So if BD is 15 ,DC will also be 15

therefor total length of BC wil be 30 (15 +15)

marissa [1.9K]3 years ago

5 0

The answer is the answer is D because BC equals 30

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Please answer this question<br><br> -5(4-3)= -16 + x/3

natima [27]

Answer:

-5(1)= -16 + x/3

x/3 - 16 = -5

x/3 = 11

x = 33

6 0

2 years ago

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Yea I can do tomorrow it would take me to get the money back to you

Tems11 [23]

Given, the equation that represents the height of an object:

$y(t)=100t-16t^2$

First, we will find the velocity of the object which is the first derivative of the height using the method of the limits

$\frac{dy}{dt}=\lim_{h\to a}\frac{y(3+h)-y(3)}{(3+h)-(3)}$

We will find the value of the function y(t) when t = 3, and when t = 3+h

$\begin{gathered} y(3+h)=100(3+h)-16(3+h)^2 \\ y(3+h)=300+300h-16(9+6h+h^2) \\ y(3+h)=300+300h-144-96h-16h^2 \\ y(3+h)=156+4h-16h^2 \\ y(3)=100(3)-16(3)^2=156 \end{gathered}$

Substitute y(3+h) and y(3) into the expression of the limit

$\begin{gathered} \frac{dy}{dt}|_{t=3}=\lim_{h\to a}\frac{156+4h-16h^2-156}{3+h-3}=\lim_{h\to a}\frac{4h-16h^2}{h} \\ \\ \frac{dy}{dt}|_{t=3}=\lim_{h\to a}(4-16h) \end{gathered}$

Where a = 0

d) compute the instantaneous velocity at t = 3