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Burka [1]
4 years ago
15

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

Mathematics
1 answer:
Verizon [17]4 years ago
6 0
\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}
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How man y kilometers traveled by bike ?
Alex777 [14]
Total was 200
x+y=200
biking was 40 mor than bus
x=40+y
subsitute 40+y for x in other equation

x+y=200
40+y+y=200
40+2y=200
minus 40 both sides
2y=160
divide both sides by 2
y=80

sub back
x=40+y
x=40+80
x=120

120km biked
80km on bus
3 0
3 years ago
Jenny invests $2,000 at an interest rate of 5%. The amount of money, ma, in Jenny's account after t years can be
Margaret [11]

After t years, the expression that can be used to represent the money in Jenny account is  Mp=2000(1.05)^t+(1.05)^4

<h3 /><h3>Compound interest Computation</h3>

Given Data

  • Principal  P = $2000
  • Rate r = 5%
  • Time t = 4 years

A = P + I where

P (principal) = $2,000.00

I (interest) = $431.01

Calculation Steps:

First, convert R as a percent to r as a decimal

r = R/100

r = 5/100

r = 0.05 rate per year,

Then solve the equation for A

A = P(1 + r/n)^nt

A = 2,000.00(1 + 0.05/1)(1)(4)

A = 2,000.00(1 + 0.05)(4)

A = $2,431.01

Summary:

The total amount accrued, principal plus interest, with compound interest on a principal of $2,000.00 at a rate of 5% per year compounded 1 times per year over 4 years is $2,431.01.

Learn more about compound interest here:

brainly.com/question/24924853

7 0
3 years ago
Read 2 more answers
12
MrRa [10]

Answer:

D. (-2,0)

Step-by-step explanation:

The points in the darkest gray are any of the solutions. So the only point that is in there is D (-2,0)

6 0
2 years ago
Which types of quadrilaterals have four congruent sides?
kati45 [8]
The correct answer is A - rhombus and square.

B is incorrect because a parallelogram doesn't necessarily have congruent sides, it just has sides that are parallel.
C is incorrect because a rectangle has a pair of sides longer than the other pair of sides.
D is wrong because of the reason listed under C.

Hope this helps.
4 0
3 years ago
Read 2 more answers
Find an equation for the line that passes through the points (-4, -1) and (6, 3)
skad [1K]

Answer:

y=2/5x+3/5

Step-by-step explanation:

Use the slope formula to get the slope:

m=4/10

m=2/5

The y intercept is 3/5

The equation is y=2/5x+3/5

3 0
3 years ago
Read 2 more answers
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