Can someone help!????

Mathematics

1 answer:

Makovka662 [10]3 years ago

4 0

the answer is 7Г2÷2 (the first one)

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Can someone help me find the value of x and the value of y? I need them to show their work, too.

solniwko [45]

$\bf \begin{cases} x-2y=0\\ 2x-5y=-4 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ x-2y=0\implies x=2y \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{substituting the found \underline{x} in the 2nd equation}}{2(2y)-5y=-4}\implies 4y-5y=-4\implies -y=-4 \\\\\\ y=\cfrac{-4}{-1}\implies \blacktriangleright y=4 \blacktriangleleft \\\\[-0.35em] ~\dotfill$

$\stackrel{\textit{substituting the found \underline{y} in the 1st equation}}{x-2(4)=0}\implies x-8=0\implies \blacktriangleright x=8 \blacktriangleleft \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (8,4)~\hfill$

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3 years ago

Circumference = 314 cm<br> Diameter =<br> Radius =

fenix001 [56]

Answer:

D=100

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Step-by-step explanation:

Diameter can be found by dividing the circumference by pi (314/3.14=100). Dividing the diameter in halve is used to find the radius (100/2=50).

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3 years ago

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SpyIntel [72]

Answer:

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Step-by-step explanation:

$\measuredangle 6$ corresponds with $\measuredangle 2$

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3 years ago

How many prime numbers are there in between and 60 20

ladessa [460]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Identify the first operation needed in this equation

ruslelena [56]

Addition is the first step in solving the equation. Here is how to solve this problem:

x/3 - 3 = 11
+ 3 + 3
------------------------
x
(3) -------- = 14(3)
3

x = 42

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3 years ago