3 years ago

(2-5i)(4+7i)? How do u do this? HELPPPPPPPP

1 answer:

3 0

The "I"'s r variables, now u do 2-5 which sequels -2. now u do 4+7 and that ='s 11. now I think u take 11 and -2 and u subtract 11-(-2). or it could be change the negative into a positive and add them together.

You might be interested in

If f(x) = -2x + 7, find f(8)

anastassius [24]

Answer:

-9

Step-by-step explanation:

You have to plug 8 into the formula for x. f(8) = -2(8)+7 = -16+7 = -9

5 0

3 years ago

Mrs Katie constructs a cube with 512 magnetic block students and her two classes will each make an identical cube. There are 28

devlian [24]

I take it each student is going to make a block.
She has 25 + 28 students all together which is 53 students total
Each one requires 512 magnetic blocks

Therefore she needs 53 * 512 = 27136 blocks.

6 0

3 years ago

Simplify the expression. (3 points) -5+i/2i<br><br> WILL GIVE BRAINLY

Verizon [17]

$\bf recall~that\qquad i^2=-1\\\\
-------------------------------\\\\
\cfrac{-5+i}{2i}\cdot \cfrac{i}{i}\implies \cfrac{i(-5+i)}{2i^2}\implies \cfrac{-5i+i^2}{2(-1)}\implies \cfrac{-5i+(-1)}{-2}
\\\\\\
\cfrac{-5i-1}{-2}\implies \cfrac{1+5i}{2}$

6 0

4 years ago

Three numbers a,b,c have a median of 4 and range of 7

lozanna [386]

It’s 1+1 equal 11 btw I don’t know

3 0

3 years ago

Test due tomorrow pls helpp!!

grandymaker [24]

5 and 2

Hope this helps

4 0

3 years ago