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Irina-Kira [14]
3 years ago
11

Imagine that the price per gallon of gas with a $7 car wash is $3.32 and the price without a car wash is $3.52 When is it worth

it to buy the car wash? When is it worth it if the car wash cost $4
Mathematics
1 answer:
Novosadov [1.4K]3 years ago
3 0

Answer: b and d

Step-by-step explanation:it IS

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AlekseyPX
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On number 50 I don't understand thanks to whoever is helping me
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The sum of two numbers is 110. The larger number is 2 less than 7 times the smaller. Find the larger number.
kumpel [21]
We call two numbers a and b, notice a>b
<span>The sum of two numbers is 110: a+b=110
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5 0
3 years ago
Solve the system using substitution x+5y=0 3y+2x=-21
Crazy boy [7]

Answer:

\left \{ {{x = -15} \atop {y=3}} \right.

Step-by-step explanation:

\left \{ {{x + 5y = 0} (1) \atop {3y + 2x = -21}(2)} \right.  \left \{ {{x = -5y} \atop {3y + 2x = -21}} \right.    \left \{ {{x = -5y} \atop {3y + 2*(-5y) = -21}} \right.  \left \{ {{x = -5y} \atop {3y - 10y = -21}} \right. \\ \left \{ {{x = -5y } \atop {-7y = -21}} \right.  \left \{ {{x = -5y} \atop {y= 3 }} \right.  \left \{ {{x = -5 * 3} \atop {y=3}} \right.=> \left \{ {{x=-15} \atop {y=3}} \right.

5 0
2 years ago
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What does it mean when a researcher states that an observed effect or difference is significant with a confidence level of 99%?
icang [17]

Answer:

it affected more than half

Step-by-step explanation:

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3 years ago
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