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german
3 years ago
8

Find the value of b to the power of 2, minus 4ac when a = -2, b = 5 and c = -1. Show your work.

Mathematics
2 answers:
aev [14]3 years ago
6 0
The answer is 17 the work is in the photo below

Gwar [14]3 years ago
4 0

Answer: 33

Step-by-step explanation:5^2-4(-2)(-1)

25-4(2)(-1)

25+8=33

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What is the value of i^20+1?<br> A. 1<br> B. –1<br> C. –i<br> D. i
lisov135 [29]

ANSWER

{i}^{20}  + 1 =2

EXPLANATION

The given expression is;

{i}^{20}  + 1

Recall that, in complex numbers

{i}^{2}  =  - 1

We use this identity to simplify the given expression:

{i}^{20}  + 1 =( {i}^{2})^{10}  + 1

This implies that:

{i}^{20}  + 1 =(  - 1)^{10}  + 1

{i}^{20}  + 1 =1+ 1

{i}^{20}  + 1 =2

5 0
3 years ago
Read 2 more answers
Which expression represents the sum of (2x-5y) and (x+y)?
lawyer [7]

(2x - 5y) + (x + y) \\  = 2x - 5y + x + y \\  = 3x - 4y
3 0
4 years ago
4. If the figures below are similar with a scale factor<br> of 2:3, find the value of x.
Kobotan [32]

Answer:

x = 63

Step-by-step explanation:

Using proportion to solve for x

\frac{42}{x} = \frac{2}{3} ( cross- multiply )

2x = 126 ( divide both sides by 2 )

x = 63

4 0
3 years ago
Juan is making a college and puts together a circle made out of various pieces of construction paper. The circle has a diameter
Nina [5.8K]

Answer:

Step-by-step explanation:

I think all you need to do is multiply the 40 by the other number it will equal you the answer.

4 0
3 years ago
Help me plzz!!
s2008m [1.1K]

Answer:

41/6 lb

Step-by-step explanation:

Start with the original problem

5 11/6

1.) Learn the parts of the mixed number. In this case, 5 is a whole number, 11 is a numerator, and the 6 is the denominator.

2.) to turn a mixed number into an improper fraction or a whole number, multiply the denominator times the whole number (6 * 5 = 30) then add the numerator to the value you got (30 + 11 = 41)

3.) If the improper fraction can be simplified then you will most likely need to go ahead and simplify it. In this case, 6 doesn't factor into 41 so you would keep it as 41/6.


3 0
3 years ago
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