2 years ago

Someone please help

Mathematics

1 answer:

jeyben [28]2 years ago

4 0

Answer:

The first one

Step-by-step explanation:

Because

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During the holiday season, David got a job a Target. He gets paid $15.00 an hour for the first 8 hours of work on any given work

umka2103 [35]

Answer:The most money he can make in one day is $210

Step-by-step explanation:

8x15 is 120. in 10 hours he can make $15 for every hour and a half. He can make another 90 dollars in the last 10 hours. 90 plus 120 equals $210.

6 0

2 years ago

the interest earned on an account varies directly with the balance in the account. if an account with a balance of $200 earns $1

sp2606 [1]

$\bf \qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby \begin{array}{llll} k=constant\ of\\ \qquad variation \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}$

$\bf \stackrel{\textit{\underline{I}nterest varies with \underline{b}alance}}{I=kb}\qquad \qquad \textit{we know that } \begin{cases} b=200\\ I=12.5 \end{cases} \\\\\\ 12.5=k200 \implies \cfrac{12.5}{200}=k\implies \cfrac{~~\frac{125}{10}~~}{\frac{200}{1}}=k\implies \cfrac{125}{10}\cdot \cfrac{1}{200}=k \\\\\\ \cfrac{1}{16}=k \qquad \qquad \textit{therefore}\qquad \boxed{I=\cfrac{1}{16}b} \\\\\\ \textit{when b = 500, what is \underline{I}?}\qquad I=\cfrac{1}{16}(500)\implies I=\cfrac{125}{4}\implies I=31.25$