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Nata [24]
3 years ago
8

R= 1/2(r1+r2) what is r2

Mathematics
1 answer:
Soloha48 [4]3 years ago
6 0
If r=1/2
then r2 = 1
because 1/2 times 2 is 1
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What is 51/2 × 21/3? <br><br> A. 132/5<br> B. 131/6<br> C. 127/8<br> D. 125/6
IRINA_888 [86]
In multiplying fractions, you multiply the numerators and denominators.
51 / 2 * 21 / 3
can be reduced as

(17 / 2) * (21 / 1)
357 / 2 --> This is the answer based on the given.

Assume that its a mixed fraction:
5 1/2 * 2 1/3
11/2 * 7/3
= 77 /6
7 0
3 years ago
Answer please if you can:))
MaRussiya [10]
I can’t see the exact numbers because the pic is blurry but here’s how to solve it.

The three angles in a triangle always add up to 180. So subtract the angle that’s given and you’ll have the sum of the two other angles. Since it’s an equilateral triangle, the other two angles are the same.
So write the equation 2(whatever the angle is) = the number you get when you do 180-the given angle

For example (I’m not sure these numbers are right because the pic is blurry)
2(9x+7)=114
Then you would solve for x and once you get x, plug it into the angle expression 9x+ 7 or whatever to get the angle measure.
5 0
2 years ago
4. Daniel owns a street food business. He offers hot dogs at $2.10, slices of pizza ar
olga nikolaevna [1]

Answer:

Step-by-step explanation:

3 0
2 years ago
If v1 = (2,-5) and v2 = (4,-3), then the angle between the two vectors is _________. Round your answer to two decimal places.
siniylev [52]
The angle between two vectors is given by:
 cos (x) = (v1.v2) / (lv1l * lv2l)
 We have then:
 v1.v2 = (2, -5). (4, -3)
 v1.v2 = (2 * 4) + (-5 * (- 3))
 v1.v2 = 8 + 15
 v1.v2 = 23
 We look for the vector module:
 lv1l = root ((2) ^ 2 + (-5) ^ 2)
 lv1l = 5.385164807
 lv2l = root ((4) ^ 2 + (-3) ^ 2)
 lv2l = 5
 Substituting values:
 cos (x) = (23) / ((5.385164807) * (5))
 x = acos ((23) / ((5.385164807) * (5)))
 x = 31.33 degrees
 Answer:
 
The angle between the two vectors is:
 
x = 31.33 degrees
3 0
3 years ago
Melanie makes $3.00 less per hour babysitting than her best friend, Carita. If the combined hourly rate of Melanie and Carita is
marysya [2.9K]

Answer:

B 6.00

Step-by-step explanation:

M= 6$

C= 9$

M+C= 6+9= 15$ per hour

3 0
3 years ago
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