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valentina_108 [34]
3 years ago
14

Given f(x)=4x^2-9 and g(x)=2x+3 find each function or value (f-g)(4)

Mathematics
1 answer:
yulyashka [42]3 years ago
4 0
(f-g)(x) = 4x²-2x-12 which,evaluated at x=4, gives 64-8-12=44
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If y varies jointly as x and the cube of z and y=16 when x=4 and z=2 then y=0.5 when x=-8 and z=-3?
Evgesh-ka [11]

Answer: F (False)

Step-by-step explanation:

 Jointly variation has the following form:

y=kxz

Where k is a constant of propotionality.

Substitute values:

If y=16, x=4 and z=2, then k is:

16=k(4)(2)^{3}\\k=1/2

If x=-8 and z=-3 the the value of y is:

y=(1/2)(-8)(-3)^{3}\\y=-108

Then the answer is FALSE.

8 0
3 years ago
Read 2 more answers
11 m
liubo4ka [24]

first off let's notice that the height is 11 meters and the volume of the cone is 103.62 cubic centimeters, so let's first convert the height to the corresponding unit for the volume, well 1 meters is 100 cm, so 11 m is 1100 cm.

\textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ V=\stackrel{cm^3}{103.62}\\ h=\stackrel{cm}{1100} \end{cases}\implies 103.62=\cfrac{\pi r^2 (1100)}{3} \\\\\\ 3(103.62)=1100\pi r^2\implies \cfrac{3(103.62)}{1100\pi }=r^2 \\\\\\ \sqrt{\cfrac{3(103.62)}{1100\pi }}=r\implies \stackrel{cm}{0.00510199305952} \approx r

6 0
2 years ago
Help me please!! it's due today​
Bess [88]

Answer:

the answer would be 14-16=-2

Step-by-step explanation:

first u look where the first long arrow goes on this problem then you follow the second arrow which stops at 6 then u count how much until negative 2. but how I did it is the form 14 how much to 0 which is 14 the I count how many until I get to -2 and there's the answer

3 0
3 years ago
Jeremy is on the planning committee for the rock climbing club. He is putting together a trip where members can go outdoor rock
taurus [48]

Answer:

I believe the answer is

Time to Climb (min) Independent Variable

Height (ft) Dependent Variable

Explanation:

hope this helps :)

7 0
3 years ago
Read 2 more answers
Solve the system of equations below.
trapecia [35]

Answer:

A) x + y = 8

B) 3x + 2y = 21

We multiply A) by -2

A) -2x -2y  = -16 Then we add this to

B) 3x + 2y = 21

x = 5

y = 3

Second answer is correct

Step-by-step explanation:

5 0
3 years ago
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