(5i+4) + (4i-3)
5i+4i-3+4
9i - 1

(2+i) - (3+4i)
(2+i) + (-3 - 4i)
-1 -3i

Each part, real numbers and imaginary, are to be taken as separate pieces; add them with and subtract them by each other as you normally would. :)

3 0

3 years ago

Read 2 more answers

Anna Keichline purchased six bushes for $19.27 each, a porch swing for $88.22, and a gas grill for $321.77. She must pay the sta

katrin2010 [14]

Answer:

$559.77

Step-by-step explanation:

Total cost = $6(19.27)+1(88.22)+1(321.77)=525.61$

We need to find 4.5% of 525.61. This will be state tax.

We need to find 2% of 525.61. This will be city tax.

Converting 4.5% to decimal (4.5 divided by 100) and then multiplying with 525.61 will give us the answer.

State tax = $\frac{4.5}{100}*525.61=0.045*525.61=23.65$

City tax = $\frac{2}{100}*525.61=0.02*525.61=10.51$

Grand total purchase price is 525.61 + 23.65 + 10.51 = $559.77

5 0

4 years ago

Read 2 more answers

Find the circumference of the circle and round to the nearest tenth

Ede4ka [16]

Step-by-step explanation:

Circumference of Circle =

$2\pi \: r$

given d = 19.4mi

r = 1/2d

= 1/2 x 19.4

= 9.7mi

Circumference of Circle =

$2\pi(9.7) \\ = 19.4\pi \\ = 60.9mi \: (nearest \: tenth)$

8 0

3 years ago