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Oksi-84 [34.3K]
2 years ago
8

8.21 as a mkxed number

Mathematics
2 answers:
Ede4ka [16]2 years ago
8 0

Answer:

8 21/100

Step-by-step explanation:

Anastaziya [24]2 years ago
3 0
8 21/100 is 8.21 as a mixed number. 821/100 is 8.21 as an improper fraction.
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Please help me!!!!!​ i need full answer.
salantis [7]

Answer:

see explanation

Step-by-step explanation:

Using the sum/ difference → product formula

cos x - cos y = - 2sin( \frac{x+y}{2})sin (\frac{x-y}{2} )

sin x - sin y = 2cos (\frac{x+y}{2} )sin (\frac{x-y}{2} )

Given

(cosA - cosB)² + (sinA - sinB )²

= [ - 2sin(\frac{A+B}{2})sin(\frac{A-B}{2} ) ]² + [ 2cos(\frac{A+B}{2} )sin(\frac{A-B}{2} ) ]²

= 4sin² (\frac{A+B}{2} )sin² (\frac{A-B}{2} ) + 4cos² (\frac{A+B}{2} )sin² ( \frac{A-B}{2} )

= 4sin² (\frac{A-B}{2} )[ sin² ( \frac{A+B}{2} ) + cos² ( \frac{A+B}{2} ) ← sin²x + cos²x = 1

= 4sin² ( \frac{A-B}{2} ) × 1

= 4sin² ( \frac{A-B}{2} ) = right side ⇒ proven

4 0
3 years ago
1/4 times X -1+ 3X equals 2
iris [78.8K]

Answer:

41

Step-by-step explanation:

4 0
2 years ago
ABCD is a parallelogram. Determine the measure of ZB.<br> A) 78°<br> B) 52°<br> C) 39°<br> D) 96°
vovikov84 [41]

\huge\fbox{Answer ☘}

☆ given that ,

ABCD is a parallelogram

☆ we know that ,

opposite angles of a parallelogram are equal.

Therefore ,

\bold\blue{∠B \:= \:∠D}

\pink{3x = x + 52} \\ \pink{3x - x = 52 }\\\pink{ 2x = 52 }\\\pink{ x =  \frac{52}{2}}  \\ \\ \bold\blue{x = 26}

therefore , ∠B = 3x = 3 ( 26° ) = 78°

\fbox{∠B \: = \: 78°}

thus option ( A ) is correct ~

hope helpful~

8 0
2 years ago
Read 2 more answers
What is the answer to :<br> 2x (4+3) -5 x [4-(9-7)]<br> ??
ZanzabumX [31]

Answer:

8×+6×-5×{2}

8×+6×-10×

14×-10×

4×

6 0
2 years ago
Read 2 more answers
petes pizza charges $13 for a pizza, and a soda costs $1.50. Mamas house charges $15 for a pizza, and a soda $1. write an expres
Mademuasel [1]
13 +13 = 26 for pizza  2 sodas = 3.00.  Total bill:  $29.00
mamas 15 + 15 = 30  soda= 2.  Total bill:  $32.00
3 0
3 years ago
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