If you would like to know which of the following steps should be performed to eliminate variable d first, you can find this using the following steps:
equation a: 2c = d - 8 /*(-3)
equation b: c = 3d + 8
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-6c = -3d + 24
c = 3d + 8
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-6c + c = -3d + 24 + 3d + 8
-5c = 32
5c = -32
c = -32/5
<span>The correct result would </span>be: <span>multiply equation a by −3.</span>
A2 + b2 = c2
Number 1 is 15.1986.... or 15.2
Explanation: 5 squared is 25 and 16 squared is 256. Subtract 256 minus 25 to get 231, then divide it by the square root.
Number 2 is 7.21111.... or 7.2
Explanation: 6 squared plus 4 squared is 52, square root of 52= 7.2
Answer: x=-3 and y= -15
Step-by-step explanation: 1 Substitute y=5xy=5x into 4x-2y=184x−2y=18.
-6x=18
−6x=18
2 Solve for xx in -6x=18−6x=18.
x=-3
x=−3
3 Substitute x=-3x=−3 into y=5xy=5x.
y=-15
y=−15
4 Therefore,
\begin{aligned}&x=-3\\&y=-15\end{aligned}
x=−3
y=−15
Answer:
27
Step-by-step explanation:
27, because 6.75*4=27
