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Degger [83]
4 years ago
13

Lenny is saving up to buy a car. The table below shows the linear relationship between how much Lenny has saved and the number o

f weeks he has been saving. Based on the table, what was the rate of change of the balance of Lenny’s savings account in dollars and cents per week? $45.00 per week $45.00 per week $54.00 per week $54.00 per week $12.25 per week $12.25 per week $22.50 per week $22.50 per week
Mathematics
1 answer:
Novay_Z [31]4 years ago
6 0

Answer:

22.50

Step-by-step explanation:

I got it right

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Naily [24]
-8r on both sides; -2r=16; now divide by -2; r=-8
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3 years ago
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Add the polynomials: x2 + 2x + 1 and y2 + 2x + 3.
cestrela7 [59]
<h3><u>Answer:</u></h3>
  • 6x + 4 + 2y
<h3><u>Step-by-step explanation:</u></h3>
  • x2 + 2x + 1 + y2 + 2x + 3
  • => 2x + 2x + 1 + 2y + 2x + 3
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  • => <u>6x + 4 + 2y</u>
<h3><u>Conclusion:</u></h3>

Therefore, the above answer is correct.

Hoped this helped.

BrainiacUser1357

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2 years ago
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Help!!!!!!!!!!!!!!!!
Andru [333]

Step-by-step explanation:

The area would be 9 times compared to the area of the original square. To test this, you can let the side of the original square be equal 1. By tripling this side, the side becomes three. Utilizing the area of a square formula, A= s^2, the area of the original square would be 1 after substituting 1 for s. Then, you do the same for the area of the tripled square. With the substitution, the area of the tripled square would be 9. This result displays the area of the tripled square being 9 times as large as the area of the original square. This pattern can be used for other measurements of the square such as:

let s = 2, Original Area= 2^2 = 4 Tripled Area= (2(3))^2 = 6^2= 36. 36/4 = 9

let s = 3, Original Area = 3^2 = 9 Tripled Area - (3(3))^2 = 9^2 =81. 81/9 = 9

let s = 4, Original Area = 4^2 = 16 Tripled Area - (4(3))^2 = 12^2 = 144. 144/16 = 9

let s = 5, Original Area = 5^2 = 25 Tripled Area - (5(3))^2 = 15^2 = 225. 225/25 = 9

let s = 6, Original Area = 6^2 = 36 Tripled Area - (6(3))^2 = 18^2 = 324. 324/36 = 9

let s = 7, Original Area = 7^2 = 49 Tripled Area - (7(3))^2 = 21^2 = 2,401. 2,401/49 = 9

You can continue to increase the length of the square and follow this pattern and it will be consistent.

7 0
3 years ago
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Lena drew a trapezoid on a coordinate grid. The table shows the coordinates of the four vertices.
kaheart [24]
The answer is B, 8 units.
3 0
3 years ago
Joe and Mary each pay the same price for a T-shirt. Before they buy it, Mary has $\$ 2$ more than Joe. To buy the T-shirt, Joe s
kozerog [31]
Let Joe initially have J dollars, and Mary have M dollars. Let the price of the T-shirt be T dollars.

i) "<span>Before they buy it, Mary has 2$ more than Joe":

means M=J+2

ii)

"</span>To buy the T-shirt, Joe spends 1 $ less than \frac{2}{5} of his money<span>"

so  </span>T= \frac{2}{5}J-1
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iii) 

</span><span>"Mary spends \frac{1}{3} of her money"
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means T= \frac{1}{3}M

equalize equations ii) and iii):

\frac{2}{5}J-1= \frac{1}{3}M        (they are both equal to T)

substitute M=J+2 from equation i:

\frac{2}{5}J-1= \frac{1}{3}(J+2)

\frac{2J-5}{5}= \frac{J+2}{3}

3(2J-5)=5(J+2)

6J-15=5J+10
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so M=25+2=27 (dollars)

Together Mary and Joe had 27+25=52 (dollars)


Answer: 52 $
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