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torisob [31]
3 years ago
14

PLZ HELP with 11) a and b IT'S GREATLY APPRECIATED show all your work plz

Mathematics
1 answer:
raketka [301]3 years ago
6 0
11a. I can't show the workings because I don't have pie on my keyboard. am so sorry but number 11a's answer is 6
11b = 10
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Fernando cleans pools for the summer for $25 an hour plus a supply fee of $15.
puteri [66]

Answer:

15x+25 ; 70

Step-by-step explanation:

Given that,

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3 years ago
Yul has lunch at a restaurant. The bill is $14.50 and the sales tax amount is 5%. If he wants to leave a 20% tip after the sales
jek_recluse [69]

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lesantik [10]

Answer:

\huge\boxed{x=8;\ y=1\to(8;\ 1)}

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\left\{\begin{array}{ccc}y=x-7&(1)\\5+2y=7&(2)\end{array}\right\\\\\text{Substitute (1) to (2) and solve for x:}\\\\5+2(x-7)=7\qquad\text{use the distributive property}\\\\5+(2)(x)+(2)(-7)=7\\\\5+2x-14=7\\\\2x+(5-14)=7\\\\2x-9=7\qquad\text{add 9 to both sides}\\\\2x-9+9=7+9\\\\2x=16\qquad\text{divide both sides by 2}\\\\\dfrac{2x}{2}=\dfrac{16}{2}\\\\\boxed{x=8}

\text{Substitute it to (1):}\\\\y=8-7\\\\\boxed{y=1}

8 0
3 years ago
Read 2 more answers
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