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chubhunter [2.5K]
3 years ago
12

the area of a rectangular back yard is given by the trinomial b^2+5b-24. What are possible dimensions of the backyard?

Mathematics
1 answer:
yanalaym [24]3 years ago
4 0
B^2+5b-24 Using the AC method for factoring (b+8)(b-3)
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Which two values of x are roots of the polynomial below?
Julli [10]

Answer:

B. and C.

Step-by-step explanation:

1. Set the polynomial equal to zero:

x² + 5x + 7 = 0

2. Plug the given values of a, b, and c into the quadratic formula:

x=\frac{-5+-\sqrt{5^{2}-4(1)(7) } }{2(1)}

3. Solve the square root:

x=\frac{-5+-\sqrt{25-4(1)(7)} }{2(1)}

x=\frac{-5+-\sqrt{25-28} }{2(1)}

x=\frac{-5+-\sqrt{-3} }{2(1)}

4. Simplify the rest:

x=\frac{-5+-\sqrt{-3} }{2}

5. Separate the solutions:

x=\frac{-5+\sqrt{-3} }{2}  , x=\frac{-5-\sqrt{-3} }{2}

Thus, options B and C are the answers.

hope this helps!

4 0
2 years ago
I have been stuck on number 10 (this problem) for a while now. Can anyone help me with it and walk me through every step in orde
kotykmax [81]
When you multiply a same number but with different powers, you can simply add the powers together. So, in your question, add the powers -1 and -7 together.
7^(-1) x 7^(-7) = 7^(-8)

When you divide a same number but with different powers, you subtract the power at the top with the power from the denominator. So, -8 - (-7) = -1.
7^(-8) / 7^(-7) = 7^(-1)

So your answer would be 7^(-1).
Hopefully my explanation was clear?
5 0
3 years ago
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What is the area underneath a normal curve always equal to?
Pani-rosa [81]
The correct answer is C. One
3 0
2 years ago
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HELP !!! Use the elimination method to solve the system of equations.
Dafna1 [17]

Answer:

C. (5, -3)

Step-by-step explanation:

4x + 3y = 11

x - y = 8  (multiply by 3) --> 3x - 3y = 24


4x + 3y = 11

3x - 3y = 24

---------------------add

7x = 35

 x = 5


5 - y = 8

y = 5 - 8

y = -3

(5, -3)


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3 years ago
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Answer problem 1/2 ÷ 2​
Oksana_A [137]

Answer:

0.25

Step-by-step explanation:

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2 years ago
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