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3 years ago

What is (2-7i)(-1+4i)

Mathematics

1 answer:

Daniel [21]3 years ago

7 0

15x, because 2 × 4x= 8x and -1×-7=7x...add 8x and 7x ull get the answer

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If 3 1/2 pounds of bananas cost $1.96, how much would one pound cost?

anygoal [31]

1.96/3.5 = 0.56 for 1 lb

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4 years ago

Need help with this please

Galina-37 [17]

The second graph is correct. Because the first equation is <= -x-1, it must fall under that line: only the second and fourth graphs do so. The second equation, >=2x+4, means it must fall above that line: only the second and third graphs do so.

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4 years ago

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Can someone solve both problems? <br> Step by step please

Artist 52 [7]

Answer: The reference angle for 300° is 60° and the reference angle for $\frac{3\pi }{4}$ is $\frac{\pi }{4}$

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3 years ago

A circular walking path has a diameter of 45 yards. What is the distance around the walking path

nadezda [96]

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3 0

3 years ago

Find the value of the variable y, for which:

schepotkina [342]

The value of the variable y is $y=6$

Explanation:

The given equation is $\frac{6}{y-4}-\frac{y}{y+2}=\left(\frac{6}{y-4}\right)\left(\frac{y}{y+2}\right)$

Taking LCM on LHS of the equation, we get,

$\frac{6(y+2)-y(y-4)}{(y-4)(y+2)}=\left(\frac{6}{y-4}\right)\left(\frac{y}{y+2}\right)$

Simplifying the term on RHS of the equation, we get,

$\frac{6(y+2)-y(y-4)}{(y-4)(y+2)}=\frac{6 y}{(y-4)(y+2)}$

Since, both the sides of the equation have the same denominator, we can cancel them.

Thus, we have,

$6(y+2)-y(y-4)=6 y$

Multiplying the terms within the bracket, we get,

$6y+12-y^2-4y=6 y$

Adding the like terms, we have,

$2y+12-y^2=6 y$

Subtracting both sides by $6 y$ , we have,

$-4y+12-y^2=0$

Factoring the equation, we get,

$(y+2)(y-6)=0$

$y=-2, y=6$

The values of the variable y are $y=-2, y=6$

At the point $y=-2$ , the equation $\frac{6}{y-4}-\frac{y}{y+2}=\left(\frac{6}{y-4}\right)\left(\frac{y}{y+2}\right)$ becomes undefined.

Thus, the value of the variable y is $y=6$

8 0

4 years ago