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Nat2105 [25]
3 years ago
13

I need 31 and 32 pls!!

Mathematics
1 answer:
Andrews [41]3 years ago
7 0
31)

a) Mobile plan A: y = 21.4x + 10
Mobile plan B: y = 18.5x + 14

b) Substitute 100 for "x" into each equation:
Plan A: y = 21.4(100) + 10
= 2140 + 10
= $2150

Plan B: y = 18.5(100) + 14
= 1850 + 14
= $1864

Therefore, you should pick Mobile Plan B because it costs less.
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6 0
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almond37 [142]

Answer:

$3.00 per person $8.00 per vehicle

Step-by-step explanation:

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4 0
3 years ago
Find all real solutions and show work: <br> 2x^3-3x^2+18x-27=0
Amiraneli [1.4K]

Given:

The given equation is

2x^3-3x^2+18x-27=0

To find:

All the real solutions.

Solution:

We have,

2x^3-3x^2+18x-27=0

It can be written as

x^2(2x-3)+9(2x-3)=0

(2x-3)(x^2+9)=0

Using zero product property, we get

(2x-3)=0 and (x^2+9)=0

2x=3 and x^2=-9

x=\dfrac{3}{2} and x=\pm\sqrt{-9}

We know that x=\pm\sqrt{-9} is an imaginary number because there is a negative sign under the square root.

Therefore, x=\dfrac{3}{2} is the only real solution of the given equation.

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