All categories

3 years ago

What is (-a + b) (-c + d)?

Mathematics

1 answer:

algol [13]3 years ago

4 0

Answer:

(−a+b)(−c+d)

=(−a+b)(−c+d)

=(−a)(−c)+(−a)(d)+(b)(−c)+(b)(d)

=ac−ad−bc+bd

You might be interested in

What is the area of a rectangle with a length 3 1/4 of inches and a width of 2 1/2 inches?

qaws [65]

Answer: 8.125 square inches

Explanation/Calculation:
First, convert the fractions to decimals.
3 1/4= 3.25
2 1/2= 2.5

Now multiply 3.25*2.5
You get 8.125

7 0

3 years ago

Is every natural number a rational number.

kolezko [41]

True
False
False
True
False
False

8 0

3 years ago

19. During a 2 3/4 hour assembly, each speaker spoke for 1/4 of an hour. How many speakers were there?

atroni [7]

Answer:

11 speakers

Step-by-step explanation:

2 3/4 ÷ 1/4

11/4 ÷ 1/4

11/4 x 4/1 = 44/4 = 11

6 0

3 years ago

Read 2 more answers

Pls help With this question thank you

Lapatulllka [165]

Answer:

$CD=4 \text{ cm }$

Step-by-step explanation:

We have a similarity of triangles. Once the side BC and ED are parallel,

$\frac{BC}{AC} =\frac{ED}{AD}$

$\frac{10}{AC} =\frac{5}{4}$

Once $AC=AD+CD \Rightarrow AC=4+CD$

$\frac{10}{4+CD} =\frac{5}{4}$

$5CD+20=40$

$5CD=20$

$CD=4 \text{ cm }$

6 0

3 years ago

How does adding the log together automatically mean that it is a factorial?

andreyandreev [35.5K]

Answer: The answer is given below.

Step-by-step explanation: We are given an equality involving logarithm and we are to show the implication of L.H.S. to R.H.S.

We will be using the following two properties of logarithm:

$(i)~\log_ba=\dfrac{1}{\log_ab},\\\\\\(ii)~log_ab+\log_ac=\log_a(bc).$

The proof is as follows:

$L.H.S.\\\\\\=\dfrac{1}{\log_2N}+\dfrac{1}{\log_3N}+\dfrac{1}{\log_4N}+\cdots+\dfrac{1}{\log_{100}N}\\\\\\=\log_N2+\logN3+\log_N4+\cdots+\log_N100\\\\=\log_N\{2.3.4...100\}\\\\=\log_N\{1.2.3.4...100\}\\\\=\log_N{100!}\\\\=\dfrac{1}{\log_{100!}N}\\\\=R.H.S.$

Hence proved.

6 0

3 years ago

What is (-a + b) (-c + d)?​

What is (-a + b) (-c + d)?