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oee [108]
3 years ago
5

Can someone explain how to do this?

Mathematics
1 answer:
Tems11 [23]3 years ago
4 0
         x+7
------------------- =       
  x^2+4x -21

         x+7
= -------------------
    (x+7)(x-3)

       1
= ----------  where x is not equal -7 and 3
    x - 3

answer is A. first choice
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A triangle has a base of 14 inches and<br> a height of 11 inches. Find the area.
DanielleElmas [232]

Answer:

77

Step-by-step explanation:

area triangle=half*base*height

14*11/2

154/2=77

7 0
3 years ago
Solve for x. The triangles in each pair are similar.
pishuonlain [190]
Start off by knowing that the two triangle are congruent. By knowing this you can turn the given numbers into fractions.

9/72 = 7/7x+7

then cross multiply, which equals

63x + 63 = 504

then solve this equation

63x = 441 - subtract 63 from both sides
x = 7 - divide by 63 from both sides

so your answer is x=7
6 0
3 years ago
4. A circle is centered at (−8, −13) and has a radius of 13. What is the equation of the circle? * (x + 8)² + (y + 13)² = 169 (x
sattari [20]

Answer:

(x + 8)^2 + (y + 13)^2 = 13^2

Step-by-step explanation:

Write out (x - h)^2 + (y - k)^2 = r^2.  Recognizing that the center is at

(h, k), with h = -8 and k = -13, and that the radius is 13, we get:

(x + 8)^2 + (y + 13)^2 = 13^2

7 0
3 years ago
WILL GIVE 100 POINTS AFTER YOU ANSWER
irina1246 [14]

Mean of a data = Sum of all observations ÷ Total number of observations

Mean of this data will be :

Sum of all observarions = 17 + 13 + 18 + 20 + 17 + 15 + 12 = 112

Total number of observations = 7

Mean = 112 ÷ 7

Mean = 16

Therefore the mean of this data set <em>=</em><em> </em><em>1</em><em>6</em><em> </em>

4 0
3 years ago
Read 2 more answers
What is sum of the vectors, (4.-5) and (10,2)?<br><br> (-6, 7)<br> (14,-3)<br> (14,7)<br> (15,6)
balu736 [363]

Answer:

(14,-3)

Step-by-step explanation:

To sum vectors, simply sum values at each position.

The sum is (4+10, -5+2) = (14,-3)

8 0
2 years ago
Read 2 more answers
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