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Dovator [93]
2 years ago
15

Help with these two problems and show work please having trouble solving them !

Mathematics
1 answer:
Nat2105 [25]2 years ago
6 0

Answer:

see explanation

Step-by-step explanation:

to find the zeros let f(x) = 0

1

f(x) = 0 , that is

x(x + 10) = 0

equate each factor to zero and solve for x

x = 0

x + 10 = 0 ⇒ x = - 10

2

f(x) = 0 , that is

x(x - 3) - 4(x - 3) = 0 ← factor out (x - 3) from each term on the left side

(x - 3)(x - 4) = 0

equate each factor to zero and solve for x

x - 3 = 0 ⇒ x = 3

x - 4 = 0 ⇒ x = 4

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R = 3.7 m.<br> Calculate the circumference of the circle.
Ksivusya [100]

Answer: 23.25m

Step-by-step explanation:

C=2πr=2·π·3.7≈23.24779m

3 0
2 years ago
y is inversely proptional to x when y = 7, x = 9 a) work out an equation connecting y and x b) work out the value of y when x =
OLga [1]

Answer:

a) yx=63

b) y=3

Step-by-step explanation:

a)

yx=k (inverse formula)

7(9)=k

63=k

b)

y(21)=63

y=63/21

y=3

3 0
3 years ago
Use the four-step definition of the derivative to find f'(x) if f(x) = −4x^3 −1.
guapka [62]

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\cfrac{h(-12x^2-12xh-4h^2)}{h}\implies -12x^2-12xh-4h^2 \\\\\\ \lim\limits_{h\to 0}~-12x^2-12xh-4h^2\implies \lim\limits_{h\to 0}~-12x^2-12x(0)-4(0)^2 \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \lim\limits_{h\to 0}~-12x^2~\hfill

7 0
2 years ago
A rental car agency charges a flat fee of $139.00 plus $30.00 per day to rent a certain car. Another agency charges a fee of $13
Sveta_85 [38]
139 + 30d = 13 + 51d
139 - 13 = 51d - 30d
126 = 21d
126/21 = d
6 = d

now lets check..
139 + 30d = 139 + 30(6) = 319
13 + 51d = 13 + 51(6) = 319

so on day 6, they will both cost $ 319

5 0
3 years ago
You're an aeronautical engineering student, and you have been awarded a "Co-op" job at NASA in your junior year of your 4-year p
postnew [5]

Answer:

$85,000

Step-by-step explanation:

8 0
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