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MatroZZZ [7]
3 years ago
7

PLEASE HELP ME ASAP A.20 B.22 C.7 D.11 Amosc pimp.chriz

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
4 0
It’s 11! The answer is D
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Please help, this chapter was on derivatives...
weqwewe [10]

(3) Differentiating both sides of

2x^{3/2} + y^{3/2} = 29

with respect to <em>x</em> gives

3x^{1/2} + \dfrac32 y^{1/2} \dfrac{\mathrm dy}{\mathrm dx} = 0

Solve for d<em>y</em>/d<em>x</em> :

\dfrac32 y^{1/2} \dfrac{\mathrm dy}{\mathrm dx} = -3x^{1/2} \\\\ \dfrac{\mathrm dy}{\mathrm dx} = \dfrac{-3x^{1/2}}{\frac32y^{1/2}} = \dfrac{-2x^{1/2}}{y^{1/2}} = -2\sqrt{\dfrac xy}

Then the slope of the tangent line to the curve at (1, 9) is

\dfrac{\mathrm dy}{\mathrm dx} = -2\sqrt{\dfrac19} = -\dfrac23

The equation of the tangent line would then be

<em>y</em> - 9 = -2/3 (<em>x</em> - 1)   ==>   <em>y</em> = -2/3 <em>x</em> + 29/3

(4) The slope of the tangent line to

y=\dfrac{ax+1}{x-2}

at a point <em>(x, y)</em> on the curve is

\dfrac{\mathrm dy}{\mathrm dx} = \dfrac{a(x-2)-(ax+1)}{(x-2)^2} = -\dfrac{2a+1}{(x-2)^2}

When <em>x</em> = -1, we have a slope of 2/3, so

-(2<em>a</em> + 1)/(-1 - 2)² = 2/3

Solve for <em>a</em> :

-(2<em>a</em> + 1)/9 = 2/3

2<em>a</em> + 1 = -18/3 = -6

2<em>a</em> = -7

<em>a</em> = -7/2

7 0
3 years ago
You can buy 4.3 kg of ground beef for 21.70$ or 1.6 kg for 7.85$ What is the better deal?
myrzilka [38]

Answer:

1.6 kg for 7.85 is better I believe.

Step-by-step explanation:

3 0
3 years ago
suppose that 17 inches of wire cost $0.85 at the same rate how many inches of wire can be bought for $0.55​
Tresset [83]

Answer:

11 inches

Step-by-step explanation:

17/0.85 * 0.55

20 * 0.55

11.

8 0
3 years ago
rashanda claims that she plays roughly 30 hours of golf per week she played 3 hours on monday 9 hours total on tuesday through t
mixas84 [53]

Answer:

Not accurate

Step-by-step explanation:

3+9+9=21

4 0
2 years ago
Do you inverse to slove
lys-0071 [83]

Answer: Yes, In mathematics, an inverse function (or anti-function) is a function that "reverses" another function: if the function f applied to an input x gives a result of y, then applying its inverse function g to y gives the result x, and vice versa, i.e., f(x) = y if and only if g(y) = x.

3 0
3 years ago
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