3

Mathematics

2 answers:

noname [10]3 years ago

4 0

Answer:

Step-by-step explanation:

Did you mean (y+4)^2 = 2? " ^ " denotes exponentiation.

Expanding (y+4)^2 = 2, we get y^2 + 8y + 16 = 2, or

y^2 + 8y + 14 = 0

Let's apply the quadratic formula. First, find the discriminant, b^2 - 4ac:

8^2 - 4(1)(14) = 64 - 56 = 8 (which is the square of 2√2).

Because the discriminant is positive, there are two real, unequal roots (solutions). They are:

-8 ± √8

x = -------------- = -4 ± √2

shutvik [7]3 years ago

3 0

I believe the answer is y= -3

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If A+D=117kg , A+M=88kg and M+D=161kg whats there total weight<br><br>thx in advance

garri49 [273]

Think of A as a constant - with D it's 117 and with M it's 88

So the difference between D and M is 29 (117-88)

We also know that M + D = 161

Let's substitute in the problem We will leave M equal to M and rewrite D as M+29 since it is 29 kg heavier.
M + M + 29 -161 or 2M +29 = 161 Subtracting 29 from both sides we get 2M=122
Now divide both sides two and get M=61
Since D is M+29 it is 61+29 or 100kg
Finally A + M = 88 A + 61 - 88 Subtract 61 from both sides and get A=17
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A=17kg
M=61kg
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