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dedylja [7]
2 years ago
9

I need help on. this one pliss​

Mathematics
2 answers:
Fofino [41]2 years ago
6 0
It’s 55, plug in the numbers and the equation is 5(3)^2 + 4(2.5) then
5(9)+10 lastly
45+10=55
vlada-n [284]2 years ago
6 0
The answer would definitely be 55?
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X^2+y^2=169, 3x+2y=39 please answer using substitution and each step
Oksanka [162]

Answer:

x=13,y=0

Step-by-step explanation:

We are given a system of equations

{x}^{2}  +  {y}^{2}  = 169 -  - eqn \: 1 \\ 3x + 2y = 39 -  - eqn \: 2

For equation 1,square all terms to reduce it

√x²+√y²=169

x+y=13

Make x the subject as required by the question to use substitution method

x=13-y

Plug x=13-y into eqn 2

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39-3y+2y=39

39-y=39

y=39-39=0

Plug y=0 into equation 1

x+0=13

x=0

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