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jolli1 [7]
4 years ago
9

I need help with both of these problems. Thank you!

Mathematics
1 answer:
Dmitry [639]4 years ago
3 0

Answer:

  1. 10
  2. 15ab

Step-by-step explanation:

1. The square of the binomial is ...

  (* -2m)^2 = *^2 -4m* +4m^2

Matching terms, you find ...

  *^2 = 100

  -4m* = -40

Both of these equations tell you the value of * is 10.

___

2. Same deal. Multiply ou the square and see what you have.

  (3a +2.5b)^2 = 9a^2 +15ab +6.25b^2

The term missing on the right side of the given equation is 15ab.

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How do you divide fractions
Igoryamba

1. Reverse the numerator and denominator of the second fraction and change the division sign to a multiplication sign

2. Multiply the 2 fractions (By multiplying the numerators and the denominators).

3. Simplify is necessary.

Hope this helped!

6 0
4 years ago
You purchase 26 "parking hours" that you can use over the next month to park
Nadusha1986 [10]

Answer:

The number of weekday hours are 5.

Step-by-step explanation:

<em>Let the number of weekday hours be "x".</em>

<em>The total week hours are 26, then number of weekend hours is (26-x) .</em>

<em>The charges for weekdays are $2 per hour and for weekends $10 per hour.</em>

The total money spent is $220.

(2)(x) + (26-x)(10) = 220

8x = 40

x = 5.

Thus weekday hours utilized are 5 hours, and weekend are (26-5) 21 hours.

4 0
3 years ago
Solve the eliminate <br>5a - 2b = 14<br>2a + 2b = 14​
lesantik [10]

Answer:

a = 4, b = 3

Step-by-step explanation:

7a = 28

a = 4

5(4) - 2b = 14

2b = 6

b = 3

5 0
3 years ago
Read 2 more answers
a hockey season ticket holder pays 72.48 for her tickets plus 6.00 for a program each game each game a second person pays 18.08
tiny-mole [99]
If <span>I understand the question correct, the hockey season ticket holder paid $72.48 for all of the tickets at once, and then $6.00 for each game thereafter. The second person pays $18.08 for a ticket per game.

So then let g = the number of games. The problem can be written as a system of equations:

Person 1 = 72.48 + 6g
Person 2 = 18.08g

We are looking for when the number of games for both are the same. To do this, just set them equal to each other and solve for g.

72.48 + 6g = 18.08g
Subtract 6g:
72.48 = 12.08g
Divide by 12.08:
g = 6

So after 6 games, the two would have paid the same price.

</span>
3 0
4 years ago
Five friends attend a matinee movie and spend $8 per ticket. They also purchase a small bag of popcorn each. The friends spend a
Murljashka [212]

Answer:

40+5x=62.50

Step-by-step explanation:

8 friends 5 dollars is 40 dollars. Each popcorn bag is 2.5

40+5(2.5)=62.5

40+12.5=62.5

5 0
3 years ago
Read 2 more answers
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