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2 years ago

The solution set for x^2 -x -56=0 is A.{7,8} b. {-7} c. {8} d. {-7,8} e. {7.-8}

Mathematics

1 answer:

podryga [215]2 years ago

5 0

I believe the answer is E

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Using approciate properties find -4/7*3/5+4/7*-1/5+2/5*-4/5

slega [8]

Answer: 0.548

Step-by-step explanation:

First you need to remember the formula for PEMDAS(Parenthesis,exponents,multiplication,divison,addition,subtractio)

you can do either multiplication or divison whichever comes first, same with addition+subtraction.

the underlined means to simplify

1.-0.57x3/5+4/7x-1/5+2/5x-4/5

2.-1.71/5+4/7x-1/5+2/5x-4/5

3.-0.342+4/7x-1/5+2/5x-4/5

4.-0.342+0.57x-1/5+2/5x-4/5

5.-0.342+0.57x-0.2+2/5x-4/5

6.-0.342+0.114+2/5x-4/5

7.-0.342+0.114+0.4x-4/5

8.-0.342+0.114+-1.6/5

9.-0.342+0.114+-0.32

10.-0.228+-0.32=-0.548

i did this all in one go so......

8 0

3 years ago

Value of complex number i^7+1/i^4

Vera_Pavlovna [14]

$i^7 + \dfrac 1{i^4}\\\\=i^2 \cdot i^2 \cdot i^2 \cdot i + \dfrac 1{i^2 \cdot i^2}\\\\=(-1)(-1)(-1)i + \dfrac 1{(-1)(-1)} ~~~;[ i^2 = -1] \\\\\ = (-1)^3 i+ \dfrac 1{(-1)^2} \\\\=-i+1$

7 0

3 years ago

where you imagined depositing $500 into a savings account that had an annual interest rate of 5%. Calculate how much you would e

romanna [79]

Answer:

Step-by-step explanation:

Column 1:

500 x 5% = 250

$250 in interest each year

Column 2:

500 + 250 = 750

$750 at the end.

4 0

3 years ago

# 18 What is 5.6 less than 14.52

kramer

Answer:

8.92

Step-by-step explanation:

14.52 - 5.6 =

less than means subtract

6 0

3 years ago

Read 2 more answers

Pls help me if your good at math

OLEGan [10]

Answer:

First bank last function

Second blank, the middle function

Third blank, middle function

Fourth blank, first function

7 0

2 years ago