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Ymorist [56]
3 years ago
13

What is the value of x -6/7=-x/84?

Mathematics
1 answer:
AURORKA [14]3 years ago
6 0

Answer:

x = 72 / 85

Step-by-step explanation:

x -6/7=-x/84

x + x/84 = 6/7

84/84x + 1/84x = (12*6) / (12*7)

85/84x = ( 72 ) / ( 84 )

85/84x = 72 / 84

Multiply left and right from the = sign by 84/85 and you do that so you get a division ON THE LEFT SIDE that equals as 1... See how it works:

84/85 * { 85/84 } * x = 84/85 * { ( 72 ) / ( 84 ) }

{ (84 * 85) / ( 85 * 84) } * x = ( 84 * 72 ) / ( 85 * 84 )

(7140) / ( 7140) * x =. ( 6048 ) / ( 7140)

x = 6048 / 7140

x = 72 / 85

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10) A rhombus has a<br> diagonal 8.6 mm long<br> and an area of 81.7 mm. what is the<br> perimeter?
BaLLatris [955]

Answer:

P=41.72

Step-by-step explanation:

S=ACxDB/2

81.7=8.6xDB/2

81.7=4.3xDB|:4.3

19(mm)=DB

DO=19/2=9.5

OC=8.6/2=4.3

(O is the center of the rhombus, where two diagonals meet)

a²+b²=c² (DO²+OC²=DC²)

9.5²+4.3²=c²

90.25+18,49=c²

√108,74=√c²

c≈10.43

P=4c

P=4x10.43

P=41.72

Hope it helps:)

6 0
2 years ago
The height of a triangle is 15cm, the base is 40cm and the other two side are 25cm.
morpeh [17]
The formula for the area of a triangle is base*height/2. So lets input the number.

15*40=600/2=300 cm2
6 0
3 years ago
Find the range of the given function y = 5x + 2, where x &gt; -2.
andrew-mc [135]

Answer:

Its -3,2,7

Step-by-step explanation:

Simply put, you plug in all values greater than -2. Which is what thst function tells you.

8 0
3 years ago
9.) Write the following mixed number as an improper fraction. 7 3/5​
VladimirAG [237]
7 3/5 = 7x5=35 +3 = 38/5
7 0
2 years ago
What % of everybody that was surveyed were Girls?
Natali5045456 [20]
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Then
34+44+26=104 girls
Then add 85+104=189 in total
Then divide 189/104=.055 so C
3 0
3 years ago
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