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Varvara68 [4.7K]
4 years ago
8

Solve 2x^2+x=15.!!!!

Mathematics
1 answer:
larisa86 [58]4 years ago
8 0

Isolate the variable by dividing each side by factors that dont contain variables

Answer: x=3

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How do I graph y=1/2x+7
xz_007 [3.2K]

Answer:

go to 7 on the y Axis, point it, the go up 1 and over 2, then point that.

6 0
4 years ago
Read 2 more answers
What is the value of the expression (3/7)(-2/5 •9/11)
Alex787 [66]

The answer is 54/385, or 0.14025974025974.

Hope this helps!

7 0
3 years ago
Tickets for a concert are $40 for main-floor seats and $25 for upper level seats. A total of 2000 concert tickets were sold. The
Tems11 [23]

Step-by-step explanation:

<u>to show how many tickets were sold:</u>

x = upper floor tickets

y = main floor tickets

x + y = 2000

<u>to show total amount of revenue:</u>

25x + 40y = 62,000

<u>Finding answer using both equations:</u>

x + y = 2000

multiply each side by 25

25x + 25y = 2000 × 25

25x + 25y = 50,000

25x + 40y = 62,000

-

25x + 25y = 50,000

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

15y = 12,000

^ this is column subtraction

<em>^ this column subtraction is done to isolate y so we can work with one value rather than 2</em>

15y = 12,000

divide each side by 15

12,000 ÷ 15 = 800

y = 800

x + y = 2000

x + 800 = 2000

x = 1200

Therefore 1200 upper-level tickets were sold

800 main floor tickets were sold

4 0
3 years ago
Can someone help me on these three
vivado [14]

Answer:

20) 2.084 meters

21) $75

22) 0.123 meters

23) 4 foot pieces

Step-by-step explanation:

20) divide the length by 4:

8.336 ÷ 4 = 2.084 meters

21) divide total cost by the amount of tickets:

39300 ÷ 524 = $75

22) subtract the smaller number from the greater number:

0.884 - 0.761 = 0.123 meters

23) the greatest common factor of 8 and 12 is 4, so he should cut each rope into 4 foot long pieces

8 0
3 years ago
Kevin and Randy Muise have a jar containing 46 coins, all of which are either quarters or nickels. The total value of the coins
Zepler [3.9K]

Answers:

24 quarters

22 nickels

==========================================================

Work Shown:

q = number of quarters

n = number of nickels

q+n = 46 coins total which solves to n = 46-q

25q = value of all the quarters in cents

5n = value of all the nickels in cents

25q+5n = value (cents) of all the coins of both types

25q+5n = 710 cents total = $7.10

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

Apply substitution.

25q+5n = 710

25q+5(46-q) = 710

25q+230-5q = 710

20q+230 = 710

20q = 710-230

20q = 480

q = 480/20

q = 24

They have 24 quarters

This yields 25*q = 25*24 = 600 cents = $6.00 so far.

Use that value of q to find n

n = 46-q

n = 46-24

n = 22

They also have 22 nickels.

They have an additional 5n = 5*22 = 110 cents = $1.10

In total, they have 6.00+1.10 = 7.10 dollars which confirms we have the correct coin counts. Also, q+n = 24+22 = 46.

8 0
3 years ago
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