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sladkih [1.3K]
3 years ago
15

Find the sum: (7b -2) + (-4b + 5)

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
8 0

Answer:

=3b+3

Step-by-step explanation:

\mathrm{Remove\:parentheses}:\quad \left(a\right)=a, =7b-2-4b+5.

\mathrm{Group\:like\:terms}:

=7b-4b-2+5

\mathrm{Add\:similar\:elements:}\:7b-4b=3b

=3b-2+5

\mathrm{Add/Subtract\:the\:numbers:}\:-2+5=3

=3b+3

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Which equation has no solution?<br> |-x - 31 = 5<br> |2x– 11=0<br> |5 - 3x = -8<br> |-x + 9| = 0
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Answer:

the 3rd one

Step-by-step explanation:

the answer cannot be negative for absolute values. Unless, there is a negative sign outside the absolute value

3 0
3 years ago
AC = 143,<br> BC = 8x + 4, and<br> AB = 7x + 4,<br> Find BC.
dedylja [7]

Answer:

Hope this helps you mate

5 0
4 years ago
Getaway Travel Agency surveyed a random sample of 454545 of their clients about their vacation plans. Of the clients surveyed, 2
Simora [160]

Answer:

241 clients

Step-by-step explanation:

His problem can be solved using the principle of proportionality or rule three.

We can take advantage of the proportion between respondents who tell us the number of respondents and how many expect to go on vacation and the total number of workers, therefore:  

                         Respondents /// Whole company

Vacations                  21                          x

Total                          45                        516

then x equals:

x = (516 * 21) / (45)

x = 240.8

x = 241 clients

This means that approximately 241 clients expect to go on vacation throughout the company.

8 0
3 years ago
Read 2 more answers
Thomas happened to notice that at 4:00 p.m. on his uncle's farm, a fence post that was 5 feet tall cast a 3 foot shadow. he also
mash [69]
I used the proportion:
5:3=x:12
x=((12)(5))/3=20
20 feet
8 0
3 years ago
Read 2 more answers
18. A science teacher has a supply of 20% saline solution and a supply of 50% saline solution. How much of each solution should
IrinaK [193]

Answer: Option 'B' is correct.

Step-by-step explanation:

Since we have given that

There is a supply of 20% saline solution and a supply of 50% saline solution.

If a teacher wants to mix together to get 60 ml of 28% saline solution for an experiment.

We will use "Mixture Allegation" to find the quantity of each solution:

Ist type of solution                           II nd type of solution

      20%                                                       50%

                                    28%

--------------------------------------------------------------------------------------

50%-28%                        :                         28%-20%

 22%                               :                            8%

  11                                  :                             4

Since there is total quantity of 60 ml of solution.

So, Quantity of 20% solution in the mixture is given by

\frac{11}{15}\times 60=11\times 4=44\ ml

Quantity of 50% solution in the mixture is given by

\frac{4}{15}\times 60=4\times 4=16\ ml

Hence, there is 44 ml of the 20% solution and 16 ml of the 50% solution.

Therefore, Option 'B' is correct.

8 0
3 years ago
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