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3 years ago

How do you solve this?(5+i)(5+2i)

Mathematics

1 answer:

kozerog [31]3 years ago

7 0

Answer:

23 +15i

Step-by-step explanation:

Multiply the binomials in the usual way, then replace i² by -1 and simplify.

(5 +i)(5 +2i) = (5)(5) +(5)(2i) +(i)(5) +(i)(2i) = 25 +10i +5i +2i²

= 25 +15i +2(-1)

= 23 +15i

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-2/3a+5/6a-1/6 simplify

ratelena [41]

Answer:

$\frac{1}{6} a-\frac{1}{6}$

Step-by-step explanation:

$-\frac{2}{3} a+\frac{5}{6}a-\frac{1}{6}$

$=-\frac{4}{6} a+\frac{5}{6}a -\frac{1}{6}$

$= \frac{1}{6} a-\frac{1}{6}$

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2 years ago

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Here is a supermarket selles a breakfast cereals three different sizes of box 250g £2.90 350g £4.20 450g £5.31 wich size of the

yanalaym [24]

Box 250 because it’s the most medium weight

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3 years ago

Jeff is building a bookcase for his room and wants to be sure the shelves are parallel. He measures the angles below and knows t

katrin [286]

Answer:

∠2 and ∠4 are the supplementary angle.

Step-by-step explanation:

Shelves of the bookcase are parallel and a transversal line is intersecting these points at two distinct points.

By the property,

Sum of two interior consecutive angles measure 180°.

From the figure attached,

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3 years ago

Drag a statement or reason to each box to complete this proof.

mars1129 [50]

Statements Reason

1. $-6(x-4)= 42$ Given

2. $\frac{-6(x-4)}{-6} = \frac{42}{-6}$ Division property of equality

" Division property of equality states that if we divide both sides of an equation by the same nonzero number, the equation remains equal".

3. $x-4 = -7$ Simplifying

4. $x-4+4 = -7+4$ Addition property of equality

"Addition property of equality states that if the same number is added to both sides of an equation, then the equality is still true".

5. $x = -3$ Simplifying

Therefore, the solution to the equation $-6(x-4)= 42$ is x = -3.

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2 years ago

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It took him 8 minutes.

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2 years ago