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2 years ago

14

brainly Mike's Bikes has mountain bikes that usually sell for $275 on sale for $220. Mike used this ratio to find the percent ch

ange. Is he correct? Explain. StartFraction 55 over 220 EndFraction = 25 percent

1 answer:

kherson [118]2 years ago

8 0

Answer:

20%

Step-by-step explanation:

20%

220 divided by 275 to get .8

80% then 80% minus 100%

=20%

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1000 is 1/10 of what number?

Gekata [30.6K]

Answer:

10,000

Step-by-step explanation:

1000x10=

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In Bobby’s school, math grades for the year are calculated from assignments, tests and a final exam. Assignments count 30%, test

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Answer:

A) Bobby's overall grade is 70.4%

Step-by-step explanation:

To solve this problem we must calculate the percentages each grade represents from the overall grade. Therefore:

assignment = 85*30% = 85*30/100 = 25.5%

tests = 72*20% = 72*20/100 = 14.4%

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total = assignment + tests + exam

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Bobby's overall grade is 70.4%. Therefore the correct answer is A).

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2 years ago

Emily rented a bike from matt’s bikes. It cost $16 plus $5 per hour. If Emily paid $46 then she rented the bike for how many hou

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3 years ago

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Simplify ( 8∙4∙2 8∙7 )^2 × ( 8 0 7−3 )^3 × 7 −9 .

stich3 [128]

$\bf ~\hspace{7em}\textit{negative exponents}
\\\\
a^{-n} \implies \cfrac{1}{a^n}
~\hspace{4.5em}
a^n\implies \cfrac{1}{a^{-n}}
~\hspace{4.5em}
\cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m}
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
\left( \cfrac{8\cdot 4\cdot 2}{8\cdot 7} \right)^2\times \left( \cfrac{8^0}{7^{-3}} \right)^3\times 7^{-9}\implies \left( \cfrac{8\cdot 8}{8\cdot 7} \right)^2\times \left( \cfrac{1\cdot 7^3}{1} \right)^3\times \cfrac{1}{7^9}$

$\bf \left( \cfrac{8}{8}\cdot \cfrac{8}{7} \right)^2\times (7^3)^3\times \cfrac{1}{7^9}\implies \left( \cfrac{8}{7} \right)^2\times 7^{3\cdot 3}\times \cfrac{1}{7^9}\implies \cfrac{8^2}{7^2}\times \cfrac{7^9}{7^9}
\\\\\\
\cfrac{8^2}{7^2}\implies \cfrac{64}{49}$

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2 years ago