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3 years ago

Can you Help me on 23 ?

Mathematics

2 answers:

Kamila [148]3 years ago

7 0

Answer:

$x = 11$

Step-by-step explanation:

$\sqrt{x + 5} −3=1$

$\sqrt{x + 5} = 1 + 3$

$\sqrt{ {x} + 5 } = 4$

$\sqrt{x + {5}^{2} } = {4}^{2}$

$x + 5 = 16$

$x = 16 - 5$

$x = 11$

<h3>Hope it is helpful....</h3>

bixtya [17]3 years ago

5 0

Answer:

x is 11

Step-by-step explanation:

${ \sf{ \sqrt{x + 5} - 3 = 1}} \\ { \sf{ \sqrt{x + 5} = 4 }} \\ { \sf{x + 5 = 16}} \\ { \sf{x = 11}}$

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belka [17]

Answer:

The answer to your questions is: 25 new teachers

Step-by-step explanation:

Data

# of students = 2000

ratio = 3:80 teachers to students

New teachers = ?

Process

I suggest to use rule of three to solve this problem

3 teachers ---------------- 80 students

x ---------------- 2000 students

x = (2000 x 3) / 80 = 75 teachers

Number of initial teachers = 75

The ratio change to 1:20

1 teacher ------------------- 20 students

x ------------------- 2000 students

x = (2000 x 1) / 20

x = 100 teachers

Number of new teachers = 100 - 75 = 25

3 0

3 years ago

The price of an item has dropped to 77$ today. Yersterday it was 140$. Find the percentage decrease.

Yuki888 [10]

Answer: It dropped 55%

Step-by-step explanation: well if you multiply 140x.55 it equals to 77

5 0

2 years ago

Which table shows a proportional relationship between x and y?

Semenov [28]

Answer:

Step-by-step explanation:

A proportional relationship is a relationship which crosses through the origin (0,0) and which has a proportional constant. We can determine this either by finding (0,0) where x=0 and y=0 in the table or by dividing y/x. None of the tables contain (0,0) so we will divide y by x. We are looking for a table which when each y is divided by its x we have the same constant appearing.

Table A

$\frac{12}{3} \neq \frac{15}{6} \neq \frac{18}{8} \neq \frac{20}{10}$