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andrew-mc [135]
3 years ago
12

Name the two solutions of (2x – 1)^2 = 25.

Mathematics
2 answers:
photoshop1234 [79]3 years ago
8 0

Answer:

Solution given:

(2x – 1)^2 = 25.

square root on both side

\sqrt{(2x-1)²}=\sqrt{25}

2x-1=±5

Taking positive

2x-1=+5

2x=+5+1

x=6/2=3

Taking negative

2x-1=-5

2x=-5+1

x=-4/2

x=-2

<u>T</u><u>h</u><u>e</u><u> </u>two<u> </u><u>Solution</u><u> </u><u>i</u><u>s</u><u> </u><u>x</u><u>=</u><u>-</u><u>2</u><u> </u><u>a</u><u>n</u><u>d</u><u> </u><u>x</u><u>=</u><u>3</u><u>.</u>

Westkost [7]3 years ago
6 0

Answer:

3 & -2

Step-by-step explanation:

(2x – 1)^2 = 25

2x -1 = ±√25

2x -1 = ± 5

• 2x = 5+1

2x = 6

x = 3

• 2x = -5+1

2x = -4

x = -2

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9                 4                   2                    8                   14
10               7                  11                   8                    26
11               14                 15                  9                    38
12               11                 5                    10                  26
Total           36                 33                   35                 104

Above is a partial sum chart that will help us in our quest.

P(Grade 9 | opposed)
The probability of Grade 9, given opposed, is the portion of opposed students that are in grade 9. 
Total number opposed: 33
Number opposed in Grade 9: 2
P(Grade 9 | opposed) = 2 / 33 = 0.06

P(opposed | Grade 9)
Total Number Grade 9: 14
Number opposed in Grade 9: 2
P(opposed | Grade 9) = 2 / 14 = 0.14
6 0
3 years ago
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NARA [144]
About 176.4 is what i had gotten but i would still check out the other persons answer and compare

3 0
3 years ago
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In a survey of 1,800 people who owned a certain type of car, 810 said they would buy that type of car again. What percent of the
Yuki888 [10]

Answer:

10%

Step-by-step explanation:

1,800 people represent 100 % of people

  810  people represent     x % of people

once you line up people and percent in columns think cross multiplication

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3 years ago
During a school tournament, Team A had 10 of its 12 team members present.
jonny [76]

Answer:

Team A.

Step-by-step explanation:

We know that Team A had 10 of its 12 members present.

We can write this as the following fraction:

A=10/12

We can convert this to a decimal by dividing the two numbers. Use a calculator:

A\approx.8333

And we can convert this to a percent by moving the decimal too places to the right and by adding a percent sign:

A\approx83.33\%

So, about 83.33% of members on Team A was present.

We know that Team B had 13 of its 15 members present.

We can write this as the following fraction:

B=13/15

Again, we can convert this to a decimal by dividing the two numbers:

B\approx 0.8667

Change this to a percent:

B\approx86.67\%

So, Team A had a participation rate of 83.33% while Team B had a participation rate of 86.67%.

So, the team that had the lesser percent of the team present at the tournament is Team A.

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6 0
3 years ago
A x 10^5 + 2a x 10^4 = 7200000 and a x 10^5 - a x 10^4 = 5400000<br> Find the value of a
Anestetic [448]

Answer:

60

Step-by-step explanation:

Looking at case 1.

a * 10^5 + 2a * 10 ^4= 7200000

a * 10 * 10^4 + 2a *10 ^4 =7200000

[10a + 2a] * 10^4= 7200000

12a= 7200000/ 10000

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Looking at case 2,

a * 10^5 - a * 10^4 = 5400000

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[10a- a] *10^4 = 5400000

9a = 5400000/10000

9a= 540

a =540/9

a= 60

8 0
3 years ago
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