3 years ago

To solve the system of equations below, Grace isolated the variable y in the

Mathematics

2 answers:

yulyashka [42]3 years ago

6 0

Answer:

Step-by-step explanation:

2y=10x

Divide both sides by 2.

y=5x

Now substitute this into the second equation.

Arte-miy333 [17]3 years ago

4 0

Answer:

b. $x^2/64 - 5y^2/36=1$

Step-by-step explanation: a p e x

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$293 * 15% = $43.95 is Daniel's commission

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3 years ago

30 is decreased to 6 what is the percent

spin [16.1K]

X=percentage in decimal
30x=6
30/30x=6/30
x=1/5=.20

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20%

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3 years ago

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80% of Vanessa's final grade is based on the average score of her quizzes, which is 73.

Misha Larkins [42]

80% of quizzes + 20% of final = final grade

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3 years ago

Solve (1/81)^x*1/243=(1/9)^−3−1 by rewriting each side with a common base.

elena55 [62]

Answer:

$x=(243)log_{\frac{1}{81}}[(\frac{1}{81})-1]$

Step-by-step explanation:

you have the following formula:

$(\frac{1}{81})^{\frac{x}{243}}=(\frac{1}{9})^{-3}-1$

To solve this equation you use the following properties:

$log_aa^x=x$

Thne, by using this propwerty in the equation (1) you obtain for x

$log_{(\frac{1}{81})}(\frac{1}{81})^{\frac{x}{243}}=log_{\frac{1}{81}}[(\frac{1}{81})-1]\\\\\frac{x}{243}=log_{\frac{1}{81}}[(\frac{1}{81})-1]\\\\x=(243)log_{\frac{1}{81}}[(\frac{1}{81})-1]$

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3 years ago

0.8% of what number is 15?

frez [133]

Answer: 1875

Hope this helps!

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