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notka56 [123]
3 years ago
10

Please help me answer this <3

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
3 0

Answer:

x = 30

Step-by-step explanation:

15 = 1/2x

multiply both sides of equation by 2

30 = x

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A family went to a baseball game. They parked the car in a parking lot which charged​ $5. The cost per ticket was​ $21. Write an
Masteriza [31]

Answer:

y = 21x + 5

Step-by-step explanation

The cost for the parking spot does not change, while the cost per ticket can (depending on how many people there are).

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2 years ago
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Find all zeros x^3+2x^2+4x+21
dlinn [17]

Answer:

see explanation

Step-by-step explanation:

note when x = - 3

(- 3)³ + 2(- 3)² + 4(- 3) + 21 = - 27 + 18 - 12 + 21 = 0

hence x = - 3 is a zero and (x + 3) is a factor and dividing gives

\frac{x^3+2x^2+4x+21}{x+3} = (x + 3)(x² - x + 7)

For zeros equate to zero

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equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x² - x + 7 = 0 ← solve using quadratic formula

x = (1 ± \sqrt{1-28} ) / 2 = (1 ± 3i\sqrt{3} ) / 2

x = \frac{1}{2} ± \frac{3i\sqrt{3} }{2}

zeros are x = - 3, x = \frac{1}{2} ±\frac{3i\sqrt{3} }{2}


5 0
3 years ago
Evaluate 5+x; if x=7
maksim [4K]
X = 7


5 + x can also be written as 5 + 7

5 + 7 = 12
7 0
3 years ago
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What is the vertex of g(x) = –3x2 + 18x + 2?
svet-max [94.6K]
G(x)=1
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3 years ago
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Answer:

T = 1yrs and 8month

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S.I = PTR/100

$<u>97.30</u> = <u>$1200 × 4.5 × T</u>

1 100

Cross multiply

$5400T = $9730

divide both sides by$5400

T = 1.8yrs

8 0
2 years ago
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