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KiRa [710]
3 years ago
15

What value of k makes the trinomial x^2- 10x + k a perfect square?

Mathematics
1 answer:
Advocard [28]3 years ago
3 0

Answer: 25

Step-by-step explanation:     (x-a)² = x² - 2ax + a²

  From x² - 10x + k  we deduce that 10x = 2·5x  and a = 5

Then k = 5²2

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Central Angles
Kitty [74]

Answer:

here is the answer

Step-by-step explanation:

Central Angle: An angle whose vertex is the center of a circle. The measure of a central angle is equal to the measure of its intercepted arc. ... Inscribed Angle: An angle whose vertex is a point on a circle and whose sides contain chords.

8 0
3 years ago
Use graphing technology to find the range of the function f(x)=x2 +6x+9
lbvjy [14]

Answer:

See below.

Step-by-step explanation:

Refer to the graph.

The range of a graph is the span of y-values it covers.

From the graph, we can see that the span of y-values is all values greater than or equal to 0.

Therefore, our range is, in interval notation:

[0,\infty)

Note that we use brackets with the 0 because 0 is included in our range.

In set notation, this is:

\{y|y\in\mathbb{R},y\geq 0\}

5 0
3 years ago
Find the total surface area of a sphere radius being 7cm
Lilit [14]

Answer:

A≈615.75m²

Step-by-step explanation:

Solution

A=4πr2=4·π·72≈615.75216m²

Hope this helped!!!

6 0
3 years ago
88888888888888888888888888888
natita [175]

Answer:

to know the average of the data set  

Step-by-step explantion:

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8 0
3 years ago
Read 2 more answers
What is the perimeter of ^PQR with vertices P(-2,9) Q(7,-3) and R(-2,-3) in the coordinate plane?
e-lub [12.9K]
Using the distance formula we can determine the perimeter of PQR.

Distance formula: d=√(x-x1)^2+(y-y1)^2
distance of PR: √(-2+2)^2+(9+3)^2= 12
distance of QR: √(7+2)^2+(-3+3)^2=9
distance of PQ: √(7+2)^2+(-3-9)^2= 15

Perimeter: 12+9+15=36
5 0
3 years ago
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