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boyakko [2]
3 years ago
10

Please help me on #37. I know for A you would use the quadratic equation but I got the wrong answer.

Mathematics
1 answer:
ozzi3 years ago
6 0
Δ = (8i)^2 - 4*(-25) => Δ = -36 +100 => Δ = 64 => x1 =(-8i + 8)/2 => x1 = -4i +4;
x2 = (-8i - 8)/2 => x2 = -4i-4; in this case, your solutions are complex conjugates.
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Is 36 a square number
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Yes it is a square number
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3 years ago
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Solve the equation by factoring:<br> x^3-16x^2+63x=0<br> x <br> 3<br> −16x <br> 2<br> +63x=0
Svetlanka [38]
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3 0
3 years ago
Please help, having a hard time
rosijanka [135]

Answer:

The balcony seat costs $9,  the orchestra seat costs $9 + $6 = $15.

Step-by-step explanation:

Let x is the cost/price of one balcony seat, in dollars.

Then the cost of one orchestra seat is (x+6) dollars, according to the condtion.

The total cost of tickets is  

250x + 400*(x+6) = 8250.

Simplify it step by step.

250x + 400x + 2400 = 8250,

650x = 8250 - 2400 = 5850  ====>  x = 5850/650 = 9.

Answer.  The balcony seat costs $9,  the orchestra seat costs $9 + $6 = $15.

Check.   9*250 + 15*400 = 8250.  Correct.

3 0
3 years ago
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PJ will begin her cake deliveries at 12:20 . She asked to remind her 30 minutes before she has to leave. What time should I remi
mojhsa [17]

Answer:

At 11:50  

Step-by-step explanation:

1. Subtract the hours and the minutes separately

12:  20

<u>- 0</u>: <u> 30</u>

12: -10

2. If the minutes are negative, subtract 1 from the hours and add 60 to the minutes.

12:    -10

<u> - 1</u>: <u>+ 60 </u>

11:   50

You should remind PJ about her deliveries at 11:50.

4 0
3 years ago
What is the justification for step 2 in the solution process?12 - x = 7x +32Step 1: -X = 7x + 20Step 2: -8x = 20
HACTEHA [7]
Answer:

The subtraction property of equality

Option A is correct

Explanation:

The given equation is:

12 - x = 7x + 32

Subtract 12 from both sides

12 - 12 - x = 7x + 32 - 12

-x = 7x + 20 (Step 1)

From step 1 above, subtract 7x from both sides

-x - 7x = 7x - 7x + 20

-8x = 20 (Step 2)

Since we subtracted 7x from both sides to get step 2, the justification for step 2 is the subtraction property of equality

6 0
2 years ago
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