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love history [14]
3 years ago
9

How do I do this? I'm confused.​

Mathematics
1 answer:
Flura [38]3 years ago
3 0

Step-by-step explanation:

\huge\mathcal\blue{here's \:  your \:  solution} \\  \\ x = 2y - 14 \:  \:  \: (given) \\  \\ equation \:  = 5x - 7y =  - 43 \\  \\ now \: put \: the \: value \: of \: x \: in \: equation \\  \\ 5(2y - 14) - 7y =  - 43 \\  \\ 10y - 70 - 7y =  - 43 \\  \\ 3y - 70 =  - 43 \\  \\ 3y =  + 70 - 43 \\  \\ 3y = 27 \\  \\ y = 27 \div 3 \\  \\ y = 9 \\  \\ now \: put \: the \: value \: of \: y \: in \: equation \\  \\ x = (9 \times 2) - 14 \\  \\ x = 18 - 14 \\  \\ x = 4 \\  \\ \huge\mathfrak\red{hope \: it \: helps..}

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Find the 11th partial sum of the summation of negative 7i plus 22, from i equals 1 to infinity.
Alinara [238K]
The answer is -220 
What you do is take -7 and multiply that by (1+2+3+4+5+6+7+8+9+10+11) and then after that add 11 again and multiply it by 22. It would look like this. 

-7 x (1+2+3+4+5+6+7+8+9+10+11) +11 x 22

Simplify that to -7 x 66 +11 x 22

now multiply -7 and 66 to get -462 

-462 +11 x 22 

multiply 11 and 22 

-462 + 242 

and your final answer will be -220 
4 0
3 years ago
If two supplementaryangles are in the ratio 2:3, find the angles.
kramer
The angles are 72 degrees and 108 degrees.

Explanation:

Angle 1 : Angle 2 = 2 : 3
Angle 1 = 2k
Angle 2 = 3k

Angle 1 + Angle 2 = 180 (supplementary angles)
2k + 3k = 180
5k = 180
k = 36

Angle 1 = 2k = 2 x 36 = 72 degrees
Angle 2 = 3k = 3 x 36 = 108 degrees
5 0
3 years ago
Can you help me with this question?
RoseWind [281]

Answer:

Reason SAS postulate

Step-by-step explanation:

The two triangles must be congruent.

Reason: SAS postulate

6 0
3 years ago
I need help with this question.
Vanyuwa [196]

Answer:

BGR=2

You can DM me for the explanation

7 0
3 years ago
Evaluate this function when t = -3. r=3t-1
muminat

Answer:

r=-10

Step-by-step explanation:

Plug in the value of t into the equation.

r=3t-1; t = -3

r=3(-3)-1

r= -10

3 0
3 years ago
Read 2 more answers
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