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Kay [80]
3 years ago
14

3. Simplify the following expression 2a(a+3)-4a4a-7)

Mathematics
1 answer:
LiRa [457]3 years ago
8 0

Answer:

-14a^2+6a-7

Step-by-step explanation:

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Where does the point (6,2) lie on a circle centered at (7,8) with a radius of 6
olya-2409 [2.1K]

Answer:

<em>The point lies barely outside of the circle</em>

Step-by-step explanation:

<u>Equation of a Circle</u>

Given its center (h,k) and radius r, the equation of a circle is given by

(x-h)^2+(y-k)^2=r^2

The circle given in the question is centered at (7,8) and has a radius of 6, thus its equation is

(x-7)^2+(y-8)^2=6^2

(x-7)^2+(y-8)^2=36

To find out if a point (a,b) is outside or inside the circle area, the following conditions apply.

if (a-7)^2+(b-8)^2>36 then the point lies outside of the circle area

if (a-7)^2+(b-8)^2 then the point lies inside of the circle area

Let's use the point as given (6,2)

(6-7)^2+(2-8)^2=1+36=37

Thus the point lies barely outside of the circle

5 0
3 years ago
Solve for x.<br><br> + 1 = 3<br><br> x = 1 <br> x = 2 <br> x = 3<br> x = 6
DENIUS [597]
X=2 because 3 minus 1 equals 2
3 0
3 years ago
Read 2 more answers
PLEASE HELP ME!!! needing help now!
Phoenix [80]
The answer is it should be behind the 7  because you only moved one time in 1.7
7 0
3 years ago
Please simplify the answer!
frutty [35]

Answer:

y = 9

Step-by-step explanation:

Given

4 + \frac{y}{3} = 7

Isolate the term in y by subtracting 4 from both sides

\frac{y}{3} = 3 ( multiply both sides by 3 )

y = 3 × 3 = 9

7 0
3 years ago
You are choosing numbers from the set S ={A, B, C, D, E, F, G, H}. Let x = the number of ways to choose 3 letters from S without
postnew [5]
Given set S = <span>{A, B, C, D, E, F, G, H}
There are 8 elements in set S and we are to choose 3 letters at random, the number of ways to choose such is x. It is simply similar to choosing 5 letters at random, which is also equal to x. Since order doesn't matter, n! / (n-m)! where n = 8 and m = 3, which is 336 ways. </span>
6 0
3 years ago
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