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fenix001 [56]
3 years ago
7

Mathematics help please!! Multiple questions - any help is appreciated!!

Mathematics
1 answer:
Cloud [144]3 years ago
7 0
Https://us-static.z-dn.net/files/dfa/568f77bb33fc5a8f2808fc577636eb1a.jpeg

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three friends earned more than $200 washing cars. they paid their parents $28 for supplies and divided the rest of money equally
Flura [38]
28x+86≤200 because for supplies they divide the rest of money. that means, 200-28=172 so 172/2=86  now we gonna find the value of x.
 28x+86≤200 i am gonna subtract 86 both of side 28x+86-86≤200-86 to get value of x. 
28x≤114 divide 28 both of side to get value of x so it will be x≤4
7 0
3 years ago
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a jar contains nickels and pennies. there are 56 coins in the jar in all. the total value of the coins is 1.52. how many pennies
nevsk [136]
1 penny is just 1c
one nickel is 5 pennies or 5c

alrite...

p = amount of pennies in the jar
n = amount of nickels in the jar

we know there are 56 coins in the jar, thus whatever "p" and "n" are,

p + n = 56

we also know, the total value of all pennies and nickels is one buck and 52 cents, or 1.52.. that's 152 pennies.

now, we know there are 5 pennies in one nickel, so in "n" nickels, there are 5*n pennies, or 5n, thus

p + 5n = 152

\bf \begin{cases}
p+n=56\implies \boxed{n}=56-p\\
p+5n=152\\
----------\\
p+5\left( \boxed{56-p} \right)=152
\end{cases}

solve for "p", to see how many penny coins are there.

what about the nickels? well, n = 56 - p.
5 0
3 years ago
josh got 20% discount at a sale. He got a new shirt for $12. what was the original price of the shirt
jenyasd209 [6]

Answer:

$15.00

Step-by-step explanation:

6 0
2 years ago
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Kelly walks 0.7 mile to school. Mary walks 0.49 mile to school. Write an inequality using <,>, or = to compare the distanc
katrin2010 [14]
0.7 > 0.49
hope this helps
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3 years ago
To solve 2x + 9 = 21, what is the first step?
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D.) Subtracting 9 from each side.
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