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Shkiper50 [21]
3 years ago
6

I'm lost.. How do you even start it???

Mathematics
2 answers:
Anastasy [175]3 years ago
7 0
2x+y=4\\
-x+y=1\\\\
2x+y=4\\
\underline{x-y=-1}\\
3x=3\\
x=1\\\\
1-y=-1\\
y=2

Sladkaya [172]3 years ago
3 0
A) 2x + y = 4
B)  -x + y = 1

Multiply B) by 2
B) -2x + 2y = 2  then add to A)
A) 2x + y = 4

3 y = 6
y = 2

B) -x + y = 1
-x +2 =1
x = 1

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Caroline walks around a square pond with 30 m sides. Her paces are about 60 cm long. About how many paces will she take?
Elza [17]

Step-by-step explanation:

Perimeter of a square = 4 × L

L = Length of a side of the pond = 30m

Perimeter = 4 × L = 4 × 30 = 120m = 12,000 cm

Pace = 60cm

Number of paces = 12,000/60 = 200 paces

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3 years ago
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Evgesh-ka [11]

Answer:

7) 9.135x10^10

8) 3.428x10^-2

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You’re only supposed to have one number to the left of the decimal point in scientific notation.

7) 9.135x10^10

8) 3.428x10^-2

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3 years ago
X 6.4.5-T
butalik [34]

Same strategy as before: transform <em>X</em> ∼ Normal(76.0, 12.5) to <em>Z</em> ∼ Normal(0, 1) via

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where <em>µ</em> is the mean and <em>σ</em> is the standard deviation of <em>X</em>.

P(<em>X</em> < 79) = P((<em>X</em> - 76.0) / 12.5 < (79 - 76.0) / 12.5)

… = P(<em>Z</em> < 0.24)

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8 0
3 years ago
Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations.
Nostrana [21]
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x=3e^{i\pi/6}=\dfrac32(\sqrt3+i)
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4 0
3 years ago
What is the difference of 938.65−46.17?
Greeley [361]
Look in the picture 
i showed all the work

4 0
3 years ago
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