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anyanavicka [17]
3 years ago
6

Which statement correctly explains how Andre could find the solution to the following system of linear equations using eliminati

on?
8s - 9t = 15
7s - 2t = 12

Multiply the first equation by –7 and the second equation by 8, and then subtract.
Multiply the first equation by -7 and the second equation by 8, and then add.
Multiply the first equation by 2 and the second equation by 9, and then add.
Multiply the first equation by –2 and the second equation by 9, and then subtract.
Mathematics
2 answers:
anzhelika [568]3 years ago
8 0

Answer:

it's B

Multiply the first equation by -7 and the second equation by 8, and then add.

trust me

Deffense [45]3 years ago
6 0

Answer: choice; b) Multiply the first equation by -7 and the second equation by 8, and then add.

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How many ways can you make 65 cents using nickels dimes and quarters
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14 ways in all.

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4 years ago
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5 0
3 years ago
PLEASE HELP! 100 POINTS!!+ BRAINLIEST!!
Karolina [17]

<em>Height of the pole (DC) is 57.2709m</em>

Step-by-step explanation:

Here, Wire DA and Wire DB supports a pole.

Given that Angle, A=54 , B= 72.

Also, AB = 23m

Now, Taking triangle BCD and Using basic trigonometry

Height of pole H = DC

TanB = \frac{DC}{BC}

BC= \frac{DC}{TanB}

Now, Taking triangle ACD and Using basic trigonometry

TanA = \frac{DC}{AC}

AC= \frac{DC}{TanA}

From figure, we know that

AC = AB + BC

AC - BC = AB = 23

Replacing values of AC and BC

\frac{DC}{TanA} - \frac{DC}{TanB}=23\\DC(\frac{1}{TanA}-\frac{1}{TanB})=23

Now, TanB= Tan72 =3.0776 and TanA = Tan54=1.3763

DC (\frac{1}{1.3763} - \frac{1}{3.0776})_= 23

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DC ( 0.4016 )= 23

DC = 57.2709

Thus, Height of thepole is 57.2709m

5 0
3 years ago
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