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MariettaO [177]
3 years ago
6

3

Mathematics
1 answer:
Alenkinab [10]3 years ago
4 0

Answer:

b. 55cm

Step-by-step explanation:

Look at image for the process.

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Explain why 2x^2+18a=10 has no real number solutions
Readme [11.4K]

Answer:

This equation does have real solutions contrary to your question. They are \frac{-9 + \sqrt{101}}  {-10} OR \frac{-9 - \sqrt{101}}  {-10}.

Step-by-step explanation:

In order to prove this has real number solutions, we simply need to use the quadratic formula. To do this, we first need to solve for 0.

2x^2 + 18x = 10

2x^2 + 18x - 10 = 0

Now that we have this and they are all factors of 2, we can divide everything by 2 for ease.

2x^2 + 18x - 10 = 0

x^2 + 9x - 5 = 0

Now we can use the quadratic equation to solve. Remember that A = 1 due to the coefficient of x^2, B = 9 as the coefficient of x and C = -5 as the constant.

\frac{-b +/- \sqrt{b^{2} - 4ac}}  {2a}

\frac{-9 +/- \sqrt{9^{2} - 4(1)(-5)}}  {2(-5)}

\frac{-9 +/- \sqrt{81 + 20}}  {-10}

\frac{-9 +/- \sqrt{101}}  {-10}

\frac{-9 + \sqrt{101}}  {-10} OR \frac{-9 - \sqrt{101}}  {-10}


6 0
3 years ago
What is the missing value? (-4, 6) and (p, 7) = -1/2
Westkost [7]

Answer: perhaps a rectangle with length L=6

if so , then P = 12 + 2w ---> (P-12)/2 = 2

and area A = 6w ---> w = A/6

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Step-by-step explanation:

5 0
3 years ago
Please help me with this geometry question and show work
soldi70 [24.7K]

(3) 8

Step-by-step explanation:

Note that ∆ADE is similar to ∆ABC. As such, the ratios of their legs are equal. Also note that AD = AB + BD.

BC/AB = DE/AD

BC/10 = 12/(10 + 5) = 12/15 = 4/5

or

BC = 10(4/5) = 8

8 0
3 years ago
Hey can someone help me? My work is due tomorrow and im struggling
Anestetic [448]
The slope is positive 

Every additional hat produced results in a cost increase of $0.60. 

Before producing any hats, the manufacturing costs are about $100.00
7 0
3 years ago
Wats was the first number made​
Taya2010 [7]

Answer:

Step-by-step explanation:

hat was the first number created?

For example, the Arabic numeral system we're all familiar with today is usually credited to two mathematicians from ancient India: Brahmagupta from the 6th century B.C. and Aryabhat from the 5th century B.C. Eventually, numbers were necessary for more than simply counting things.

3 0
3 years ago
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