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marta [7]
3 years ago
13

Help quick, i'll give brainliest for whoever answers fastest and correctly!

Mathematics
1 answer:
sukhopar [10]3 years ago
8 0

Answer:

7+22i

Step-by-step explanation:

Since this is like a binomial, you have to apply the foil method

(-2+3i)(4-5i)=-8+10i+12i+15

(the 15 is the product of 3i*-5i)

Now, you combine like terms

-8+15=7

10i+12i=22i

so the expression in a+bi form is 7+22i

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In A 4 year period, About 80,000 acres of coastal wetlands in United States are lost each year. what integer represents the tota
mixer [17]

we are given

In A 4 year period, About 80,000 acres of coastal wetlands in United States are lost each year.

so, total area =80000 acres

total time = 4 years

now, we can use formula

total change in wetlands = ( total area)/(total time)

now, we can plug values

total change in wetlands is

=\frac{80000}{4} acre/year

=20000 acre/year................Answer


3 0
3 years ago
Solve the following system of equations by substitution
WITCHER [35]

Answer:

(-1, 1)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients
  • Coordinates (x, y)
  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

y = 2x + 3

y = x + 2

<u>Step 2: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

  1. Substitute in <em>y</em>:                                                                                                  2x + 3 = x + 2
  2. [Subtraction Property of Equality] Subtract <em>x</em> on both sides:                         x + 3 = 2
  3. [Subtraction Property of Equality] Subtract 3 on both sides:                        x = -1

<u>Step 3: Solve for </u><em><u>y</u></em>

  1. Substitute in <em>x</em> [Original Equation]:                                                                  y = -1 + 2
  2. Add:                                                                                                                    y = 1
3 0
3 years ago
Read 2 more answers
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bagirrra123 [75]
Where is the graph????
6 0
3 years ago
Read 2 more answers
What is 0.542 in a model
viva [34]

Answer:0.542=0.500 + 0.040+0.002

         = \frac{5}{10} + \frac{4}{100} +\frac{2}{1000}

        =5 tenth + 4 hundredths + two thousandths

One tenth = \frac{1}{10}

One Hundredth= \frac{1}{100}

One thousandth= \frac{1}{1000}

Step-by-step explanation:

7 0
3 years ago
HELP PLSSSSSSSSSSSSSS
Rom4ik [11]
9

Explanation: it’s next in the sequence
3 0
3 years ago
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