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olasank [31]
3 years ago
10

Solve the system of equations and choose the correct ordered pair. 2x + 5y = 15 5x + 10y = 35

Mathematics
1 answer:
horrorfan [7]3 years ago
4 0
X=5 and Y= 1 Hope this helps!

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An = 5 - 7n. What is the value of a12?
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Answer:

The value of a_{12}=-79

Step-by-step explanation:

Being the general expression of the sequence:

a_n=5-7n

We replace the value n=12 to get

a_{12}=5-7\times 12=5-84=-79

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Step-by-step explanation:

-2.2 - (-1.7) - (-0.4) = -4.2 + 0.3 = -3.9

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3 years ago
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Helena creates two similar rectangles using exactly 100 cm of string. The smaller rectangles width and length are 4 cm by 6 cm r
Misha Larkins [42]

Answer:

The dimensions of the larger rectangle are 24\ cm of length by 16\ cm of width

Step-by-step explanation:

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x-----> the length of the larger rectangle

y-----> the width of the larger rectangle

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\frac{x}{y}=\frac{6}{4} ------> by similar rectangles

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<u>Find the perimeter of the larger rectangle</u>

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P=100-20=80\ cm

Remember that

80=2x+2y ------> 40=x+y ------> equation B

substitute equation A in equation B

40=1.5y+y

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y=16\ cm

Find the value of x

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The dimensions of the larger rectangle are 24\ cm of length by 16\ cm of width

3 0
3 years ago
Help!! 5.1 q2 Algebra
ICE Princess25 [194]

Answer:

4y^2-y+21

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-y+4y^2+21

put it in standard form

4y^2-y+21

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3 years ago
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