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2 years ago

Can anyone please help

Mathematics

1 answer:

lilavasa [31]2 years ago

3 0

Answer:

Adult tickets = $73.5

Child tickets = $20.5

Step-by-step explanation:

${ \rm{3x + 5y = 50 - - - \{eqn \: 1 \}}} \\ { \rm{x + 5y = 31 - - - \{eqn \: 2 \}}} \\$

• Subtract eqn 2 from eqn 1:

${ \rm{2x = 21}} \\ { \rm{x = 10.5}}$

${ \rm{10.5 + 5y = 31}} \\ { \rm{5y = 20.5}} \\ { \rm{y = 4.1}}$

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Answer:

Step-by-step explanation:

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5x+x= 3-9

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3 years ago

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(2.5×10−8)(9×10−10)<br><br> Express your answer in scientific notation.

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Answer: 2.25x $10^{-17}$

Scientific notation is used in science because the number can be vary from so much that using decimal is making it hard. The number expressed in $10^{x}$ form. Both number in the question is already in scientific notation. Then to multiply the number and keep it at scienfitic notation the calculation should be:

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3 years ago

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makvit [3.9K]

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Step-by-step explanation:

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4 years ago

Cara has $25 to buy dry pet food a pound of dog food costs $2 and treats are $1 apiece if she buys 9 pounds of food the greatest

zzz [600]

Cost of each pound of dog food = $2 .

Total cost of 9 pounds of dog food = 9 * 2 = $18.

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Cost of t number of treats = 1*t = 1t .

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We can setup an inequality as,

Total cost of dog food + total cost of t number of treats ≤ 25.

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3 years ago

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Answer:

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