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Andrews [41]
3 years ago
14

Help ASAP pls will give BRAINLIEST

Mathematics
2 answers:
qaws [65]3 years ago
7 0

46.3 is the answer i think also it took me a while to find the answer ;-;

castortr0y [4]3 years ago
3 0

46.3

Why?

7.4+7.2= 14.6

6.3+6.3= 12.6

10.5+8.6= 19.1

14.6+12.6+19.1= 46.3

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Linear equation topic. (Lisa is 5 years younger than his elder brother,Daniel.The product of their ages is 2/3 of their grandmot
alisha [4.7K]
Let Daniel's age be 'x' years , hence, Lisa's age is (x - 5) years. Let Grandma's age be 'y' = 54 years.
Hence,
x(x - 5) = 2/3 × y
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∆ = (-5)² - 4(1)(-36) = 25 + 144 = 169
√∆ = √169 = 13
x\:  =  \:  \frac{ - b \:   \frac{ + }{ }   \:  \sqrt{ {b}^{2}  \:  -  \: 4ac} }{2a}
x1 = (5+13)/2, x2 = (5-13)/2
x1 = 9, x2 = -4
Since, age can't be negative,
Daniel's age = x = 9 years.
7 0
3 years ago
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AD = 4, BC = 5, AB + DC = 12. Найти AB, DC, AC.
Black_prince [1.1K]

Answer:

Im sorry but I ain't smart for this stuff

Step-by-step explanation:

lol

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