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3 years ago

Find f(-5) of f (x) = x + 1 1) 4 2) 5 6) 6

1 answer:

Alex3 years ago

7 0

F(-5) just means that your substituting the number -5 for every x value. So if you have x+1 this would be -5+1 which is -4

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Find the zeros of polynomial function and solve polynomials equations. f(x)=24x^3-64x^2-21x+56

8090 [49]

Since this polynomial has 4 terms, factoring by grouping should be the first thing we try here.

So, we have:

$8x^2(3x-8)-7(3x-8)=0 \implies\\ (8x^2-7)(3x-8)=0$

So, we can use ZPP to find out roots:

$3x-8 =0 \implies\\ x=\frac{8}{3}\\ 8x^2-7=0 \implies \\ 8x^2=7 \implies \\ x^2=\frac{7}{8} \implies \\ x=\pm\frac{\sqrt{7}}{\sqrt{{8}}}\\ \text{Rationalizing denominator:}\\ x=\pm\frac{\sqrt{56}}{8}$

So our three roots are:

$x \in \{\frac{8}{3},\frac{\sqrt{56}}{8},-\frac{\sqrt{56}}{8}\}$

8 0

3 years ago

I need helpppppppppp

Savatey [412]

Units. cause square units are for area and cubic units are for volume.

6 0

3 years ago

I'm a bit lost on this question maybe someone can help me out

Alborosie

Answer:

Step-by-step explanation:

11/4 hours on the first day

21/4 hours on the second

21-11=10

10/4 hours or 2 2/4

4 0

3 years ago

Read 2 more answers

Write an exponential function in the form y=ab^x that goes through points (0,9) and (3, 576)

sineoko [7]

Answer:

An exponential function in the form y=9(4ˣ)

Step-by-step explanation:

Step(i):-

Given that exponential function

y = a bˣ ...(i)

The equation (i) passes through the point (0,9)

9 = a (b )⁰ = a

a =9

Step(ii):-

The equation (i) passes through the point (3,576)

576 = 9(b)³

⇒ $\frac{576}{9} = b^{3}$

⇒ 64 = b³

⇒ 4³ = b³

$(4^{3} )^{\frac{1}{3} } = (b^{3} )^{\frac{1}{3} }$

b = 4

Final answer:-

An exponential function in the form y=abˣ

An exponential function in the form y=9(4ˣ)

6 0

3 years ago

Anna saved $20 in a jar each month for 2 1/2

alexandr402 [8]

Answer:

20*2.5=50

50*0.75=37.5

Hope This Helps!!!

6 0

3 years ago

Read 2 more answers