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Ivanshal [37]
3 years ago
7

using the pythagorean theorem find the area of an equilateral triangle whose side measures 7 units find the area to the nearest

tenth of a square unit
Mathematics
2 answers:
Molodets [167]3 years ago
7 0
 <span>If you have an equilateral triangle, the median is also the altitude so - That means that if you draw altitude, it will bisect the base of the triangle and meet at two right angles. That gives you two of the measurements for the right triangle - the side (6) hypotenuse, and the base (3). You can then figure out the height using the Pythagorean as you have the a and the c for the theorem. Then you can use 1/2 base times height to find the area. 
</span>
inysia [295]3 years ago
3 0
Here you go 3x-x+2=4
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Please help me ASAP!!
choli [55]

Answer:

r = -4

Step-by-step explanation:

If M is the midpoint of DE, that would mean that the distance from M to D and M to E would be the same.

This creates the equation 1-8r=13-5r.

Now it's just simple algebra.

You add 8r to both sides, creating 1=13+3r. Then, you subtract 13 from both sides, getting 3r=-12. Dividing both sides by 3 and solving for r, you get r=-4.

Checking our answer, you see that 1-8(-4)=1-(-32)=1+32=33, and 13-5(-4)=13-(-20)=13+20=33.

8 0
3 years ago
I need help with this!!!
7nadin3 [17]

Answer:

6

Step-by-step explanation:

cancel out 5 by multiplying its by 5, what you do to one side you do to the other.   so you also multiply 12 by 5. and you should get 60

3 0
3 years ago
Eight less than a number divided by seven equals 2
madreJ [45]

Answer:

x=12

Step-by-step explanation:

(X-8)/7=2

X-8=14

X=22

7 0
3 years ago
a box contains 16 cherry fruit chews, 15 peach fruit chews, and 12 plum fruit chews. Which two flavors are in the ratio 5 to 4
DerKrebs [107]
Peaches to plums. 15 divided by 3 is 5, 12 divided by 3 is 4.
8 0
3 years ago
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The fraction 7/9 produces a repeating decimal. True or false
andriy [413]

Answer:

True

Step-by-step explanation:

anything over 9 that is not 9 is a repeating decimal

8 0
3 years ago
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