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finlep [7]
3 years ago
13

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
How many solutions does this equation have? -4(5-3x)=12x+20​
UNO [17]

Answer:  The number of solutions to the given equation is zero.

Step-by-step explanation:  We are given to find the number of solutions to the following equation :

-4(5-3x)=12x+20~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

To find the number of solutions, we must solve the given equation.

The solution of equation (i) is as follows :

-4(5-3x)=12x+20\\\\\Rightarrow 5-3x=\dfrac{12x+20}{-4}\\\\\Rightarrow 5-3x=-3x-5\\\\\Rightarrow -3x+3x=-5-5\\\\\Rightarrow 0=-10, which can never be possible.

So, the given equation has no solution.

Thus, the number of solutions to the given equation is zero.

3 0
4 years ago
Determine if the survey question is biased. If the question is​ biased, suggest a better wording. How often do you eat fruit dur
jekas [21]

Answer:

The correct answers are:

1. No, because it does not lead the respondent to any particular answer (D)

2. The original question is not biased (D)

Step-by-step explanation:

In developing survey questions, response biases are tendencies for respondents to respond inaccurately or falsely to a particular question and this largely has to do with the way the questions are framed. Biased questions build preconceived thoughts in the mind of the respondent, increasing the tendency for them to lean towards a particular answer.

In this example, the question "How often do you eat fruit during an average week?" is not biased because it does not suggest to the respondent whether eating fruits is good or bad, it just directs the respondent to a particular number, hence the question is not biased.

5 0
3 years ago
Please help KSJGDHSLREKHAJFLTNBWHJDJDJFNTBEKWKHRVTNTKKR
tatiyna

Answer:

A

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Can somebody please help me and tell me how did you get the answer please thank you!!!
Aneli [31]

Answer:

10

Step-by-step explanation:

(6x-5)+(12x+5)=180

18x=180

x=10

7 0
3 years ago
Find the number that makes the ratio equivalent to 1:9. 3:
Katena32 [7]
Your answer is 3:27 because you multiply both sides by three

4 0
3 years ago
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