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nataly862011 [7]
2 years ago
10

There are 20 questions on a taste. you gain 10 points for each correct answer and lose 5 points for each incorrect answer. A stu

dent answered all the questions and scored 125 points how many questions he got correct ?​
Mathematics
1 answer:
BigorU [14]2 years ago
5 0

Answer:

20+10=30 30-5=25. 125-25=100

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Is this equation infinity many solution 5c+9=5c-12
MatroZZZ [7]

Answer:

The answer is no solution.

Step-by-step explanation: First, you would add + 12 to both sides of the equation so that you would have 5c + 21 = 5c. Then, you would subtract 5c from both sides of the equation. This would leave you with 21 = 0. Since this is not true, the equation would have no solution.

3 0
3 years ago
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What is the center of the ellipse x2+5y2–45=0?
jeka94

Answer:

Center is at (0,0)

Step-by-step explanation:

An equation of ellipse in standard form is:

\displaystyle{\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2} = 1

Where center is at point (h,k)

From the equation of \displaystyle{x^2+5y^2-45=0}. First, we add 45 both sides:

\displaystyle{x^2+5y^2-45+45=0+45}\\\\\displaystyle{x^2+5y^2=45}

Convert into the standard form with RHS (Right-Hand Side) equal to 1 by dividing both sides by 45:

\displaystyle{\dfrac{x^2}{45}+\dfrac{5y^2}{45}=\dfrac{45}{45}}\\\\\displaystyle{\dfrac{x^2}{45}+\dfrac{y^2}{9}=1}

Therefore, the center of ellipse is at (0,0) since there are no values of h and k.

8 0
2 years ago
A quadratic equation of the form 0=ax^2+bx+c has a discriminant value of 0. How many real number solutions does it have?
Firlakuza [10]
One, the answer is one
8 0
3 years ago
The area of a square is 14 square centimeters. What is the length of one side of the square?
Alex17521 [72]

Answer: 7

Step-by-step explanation: if it a square then both side have to be same length so just divide 14 by 2 to get 7

hope this helps mark me brainliest please

6 0
2 years ago
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Anyone know the answer to this?
Gelneren [198K]

2n^2/6^2+10n-1

Step-by-step explanation:

(6-n)(6+n)-(6+n)(6+n)/(6+n)(6+n)-(1-n)(1+n)

3 0
2 years ago
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