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docker41 [41]
3 years ago
6

Number 17 please! Using the number line, find the sum of 7 and -11.

Mathematics
1 answer:
yulyashka [42]3 years ago
4 0
The sum of 7 and -11 is -4
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Consider the circle with an equation in standard form: ( x – 4)² + ( y + 2)² = 36 . Explain in 2-3 sentences or explain the step
iragen [17]

Answer:

The center of this circle is found at (4, -2) and the radius is 6.

Step-by-step explanation:

The equation for a circle in standard for is  ( x – h)² + ( y - k)² = r². In this equation, (h, k) is the center of the circle and r is the radius.

From the given equation, ( x – 4)² + ( y + 2)² = 36, h is already subtracted from x, so h = 4, but the k is not subtracted, so (y + 2) = [y - (-2)], and we see that k is -2. Therefore, the center of the circle is (4, -2) and 36 = r². By taking the square root of 36, we find that r = 6.

The center of this circle is found at (4, -2) and the radius is 6.

4 0
3 years ago
The vertex of the graph of a quadratic function is (2.-1) and they intercept is (0,7). Which of the following is the equation of
Sophie [7]
\text{The vertex formula:}\\\\f(x)=a(x-h)^2+k\\\\(h;\ k)-\text{the coordinates of the vertex}
\text{We have:}\\\\\text{the vertex}\ (2;\ -1)\to h=2;\ k=-1\\\\\text{y-intercept}\ (0;\ 7)\to f(0)=7
\text{substitute:}\\\\f(x)=a(x-2)^2-1\\\f(0)=7\to a(0-2)^2-1=7\ \ \ |+1\\\\4a=8\ \ \ |:4\\\\a=2
\text{Answer in the vertex form:}\\\\f(x)=2(x-2)^2-1\\\\\text{Answer in the standard form:}\\\\f(x)=2x^2-8x+7

6 0
3 years ago
CHECK YOUR UNDERSTANDING
Sveta_85 [38]

Answer:

Retail price = $5.20

Percentage of mark up price = 30%

Step-by-step explanation:

Company sells $4.00 each wholesale.

Now the local store which is the retailer has a markup of $1.20.

This means that the retail price is;

Retail price = wholesale price + mark up = $4.00 + $1.20

Retail price = $5.20

To find the percentage of the markup, it is the fraction of the wholesale price multiplied by 100%.

Thus;

Percentage of Markup is;

1.2/4 × 100% = 30%

4 0
3 years ago
Robert is entering a contest at a local radio
lbvjy [14]

Answer:

Robert has a 59% chance of winning.

Step-by-step explanation:

I had this question on a test once, and I got it right.

Plz can I have brainliest plzzzzz

5 0
4 years ago
What is the perimeter of the figure?
Dima020 [189]
B.
88 11/24 in 
i believe that is your answer

4 0
4 years ago
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