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san4es73 [151]
3 years ago
5

Pleaseeeeeeeeeeeeeeeeeeee helppppppppppppppp

Mathematics
1 answer:
Naya [18.7K]3 years ago
8 0

Answer:

8%

Step-by-step explanation:

The reason why is his grade is 72% right and it increased to 80%.

Subtract 80 from 72 which equals 8.

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Please help! I dont understand! Thank you
Digiron [165]

QUESTION A

The given inequality is  

x-1\:>\:5

Add 1 to both sides of the inequality to obtain;

x\:>\:5+1

x\:>\:6

Answer: 2. x\:>\:6, open dot at 6 and shaded to the right.(A)

QUESTION B.

The given inequality is 2x \le 6.

Divide both sides by 2;

x \le \frac{6}{2}.

x \le 3.

Answer: 5. x \le 3, closed dot at 3 and shaded to the left(B).

QUESTION C

The given inequality is x-7\:>\:-4

Add 7 to both sides to get;

x\:>\:-4+7

\Rightarrow x\:>\:3

Answer: 7. x\:>\:3, open dot at 3 and shaded to the right.(C)

QUESTION D

We want to solve;

-2x \:

Divide through by -2 and reverse the inequality sign;

x \:>\:\frac{6}{-2}

x \:>\:-3

Answer; 3. x \:>\:-3 Open dot at -3 and shaded to the right. (D)

QUESTION E

We have  

4\:

Divide through by -4 and reverse the sign.

\frac{4}{-4}\:>\:x

-1\:>\:x

or

x\:

Answer: 6. x\: open dot at -1, and shaded to the left(E)

QUESTION F

The given inequality is -2x+3\:

Add -3 to both sides to get;

-2x\:

-2x\:

Divide both sides of the inequality by -2 and reverse the sign;

x\:>\:5

Answer:9. x\:>\:5, open dot at 5 and shaded to the right(F)

QUESTION G

The given  inequality is

5x+1\ge11

5x\ge11-1

5x\ge10

Divide by 5

x\ge2

Answer ; 10. x\ge2, closed dot at 2 and shaded to the right(G)

QUESTION H

We have 3(x+4)\:>\:8x-6

Expand the bracket to get;

3x+12\:>\:8x-6

Group similar terms to get;

3x-8x\:>\:-6-12

Simplify

-5x\:>\:-18

Divide through by -5 and reverse the sign;

x\:

Answer: 1. x\: Open dot at 18/5 and shaded to the left(H)

QUESTION I

We have -3x+4\:.

-3x+x\:

-2x\:

Divide by -2 and reverse the sign;

x\:>\:1

Answer: 8. x\:>\:1, open dot at 1 and shaded  to the right(I)

J. The given inequality -2(x-4)\:>\:5-(x+2)

Expand the bracket to get;

-2x+8\:>\:5-x-2

Group like terms to get;

-2x+x\:>\:5-2-8

-x\:>\:-5

Divide by -1 and reverse the sign to get;

x\:

Answer; 4. x\:, open dot at 5 and shaded to the left.(J)

6 0
4 years ago
For the high school's production of "Grease," 490 tickets were sold. The cost of a student
damaskus [11]

<em><u>The system of equations could  be used to determine the number of each type of ticket sold is:</u></em>

s + p + t = 490

8s + 10p + 12t = 4600

s + p = 6t

<em><u>Number of each type of ticket sold is:</u></em>

number of student tickets sold = 220

number of pre-sale non student ticket sold = 200

number of ticket sold at door = 70

<em><u>Solution:</u></em>

Let "s" be the number of student tickets sold

Let "p" be the number of pre-sale non student ticket sold

Let "t" be the number of ticket sold at door

Cost of 1 student ticket = $ 8

Cost of 1 pre-sale non student ticket = $ 10

Cost of 1 ticket sold at door = $ 12

From given information,

<u><em>490 tickets were sold. So we can frame a equation as:</em></u>

number of student tickets sold + number of pre-sale non student ticket sold + number of ticket sold at door = 490

s + p + t = 490 ---------- eqn 1

<em><u>Also given that, The  total income from ticket sales was $4600</u></em>

So we can frame a equation as:

number of student tickets sold x Cost of 1 student ticket + number of pre-sale non student ticket sold x Cost of 1 pre-sale non student ticket + number of ticket sold at door x Cost of 1 ticket sold at door = $ 4600

s \times 8 + p \times 10 + t \times 12 = 4600

8s + 10p + 12t = 4600 ------ eqn 2

<em><u>The combined number of student and pre-sale  tickets was 6 times more than the tickets sold at the door</u></em>

s + p = 6t --------- eqn 3

So eqn 1 eqn 2 and eqn 3 could  be used to determine the number of each type of ticket sold

<em><u>Let us solve eqn 1, eqn 2, eqn 3 to find values of "s" "p" and "t"</u></em>

Substitute eqn 3 in eqn 1

6t + t = 490

7t = 490

<h3>t = 70</h3>

Substitute t = 70 in eqn 2

8s + 10p + 12(70) = 4600

8s + 10p = 3760 ----- eqn 4

Substitute t = 70 in eqn 3

s + p = 6(70)

s + p = 420  ----- eqn 5

Multiply eqn 5 by 8

8s + 8p = 3360  ----- eqn 6

Subtract eqn 6 from eqn 4

8s + 10p = 3760

8s + 8p = 3360

(-) ---------------------

2p = 400

<h3>p = 200</h3>

Substitute p = 200 in eqn 5

s + 200 = 420

<h3>s = 220</h3>

<em><u>Summarizing the results:</u></em>

number of student tickets sold = 220

number of pre-sale non student ticket sold = 200

number of ticket sold at door = 70

3 0
3 years ago
Lila is ordering photos online. Each photo cost $0.08, and there is a shipping charge of $4.00 how many photos can Lila order fo
Nitella [24]
$16.00 /.08 = 200 photos
5 0
4 years ago
Julia opened a new flower shop, and her daily sales are modeled by f(x) = 2(1.25)x. Determine the rate of growth.
hammer [34]

Answer:

  D.  25%

Step-by-step explanation:

Each day, Julia's sales are 1.25 times the previous day's sales. That is, 25% more than the day before. Julia's sales are increasing 25% per day.

8 0
3 years ago
Read 2 more answers
HELP PLEASE NOBODYS HELPING ME ALL MY POINTS TO YOU
kirill115 [55]

Answer:

5,8,11

10th term = 32



4 0
3 years ago
Read 2 more answers
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