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levacccp [35]
3 years ago
15

If a^2 -b^2 =12 and a-b=4 what is the bay of a +b

Mathematics
1 answer:
slava [35]3 years ago
7 0

Answer:

a+b = 3

Step-by-step explanation:

a = b+4

a^2 = (b+4)(b+4) = b^2 + 8b +16=-b^2 = 12

8b=-4

b = - 1/2

a = 3.5

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Answer:

54 cm

Step-by-step explanation:

Perimeter = TZ + TX + RX + RY + SY + SZ

TZ = 5 cm

TX = 13 cm

RY = 9 cm

RX = TX = 13 cm (tangents drawn from and external point)

SY = RY = 9 cm (tangents drawn from and external point)

SZ = TZ = 5 cm (tangents drawn from and external point)

Plug in the values:

Perimeter = 5 + 13 + 13 + 9 + 9 + 5 = 54 cm

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2 years ago
1. Indicate the number of significant figures in each of the following quantities:
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Answer:

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2 years ago
33/(-3)+6=<br> (-20)/5 - 2=<br><br> what is the greater value?
UNO [17]
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5 0
3 years ago
Blank percent of 50 shirts is 35 shirts
kirill [66]

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Answer check :
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Answer:

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Step-by-step explanation:

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3 years ago
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