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4 years ago

Light bulb usually cost $2.00. if the sale is 0.50 of the regular price, what is the sale price

Mathematics

1 answer:

vovangra [49]4 years ago

3 0

$sale\ price= original\ price-\ discount\\\\
sale\ price=2-0.5=1.5\$\\\\
Sale\ price\ is\ equal\ to\ 1.5\$.$

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laila [671]

Answer:

Step-by-step explanation:

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4 years ago

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Is 38.5 mm greater than 10cm

gregori [183]

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3 years ago

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Can someone help me with number 135?

Nat2105 [25]

so from accidental deaths we have

30 from falls

47 from fires

200 from drowning

1950 car accidents

so the total of those is 30+47+200+1950, or 2227.

the ones that weren't car accidents will be 2227 - 1950, or 277.

if we take 2227 to be the 100%, how much is 277 off of it in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 2227&100\\ 277&x \end{array}\implies \cfrac{2227}{277}=\cfrac{100}{x}\implies x=\cfrac{277\cdot 100}{2227} \\\\\\ x\approx 12.4382577~\hspace{7em}\stackrel{rounded~up}{x=12}$

3 0

4 years ago

The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students

Soloha48 [4]

Answer:

$\boxed{\sf Number \ of \ girls \ in \ classroom =15}$

Given:

Ratio of numbers of girls to boys = 5:4

Total number of students = 27

To Find:

Numbers of girls in classroom

Step-by-step explanation:

Let number of girls be 'x' and number of boys be 'y'

$\sf \implies \frac{x}{y} = \frac{5}{4} \ \ \ \ \ \ \ \ \ \ .....Eq_{1} \\ \\ \sf \implies x + y = 27 \ \ \ \ \ \ \ \ \ \ .....Eq_{2}$

$\sf \bold{ \large From \ Eq_{1} :} \\ \sf \implies \frac{x}{y} = \frac{5}{4} \\ \\ \sf Taking \: the \: reciprocal \: of \: both \: sides:\\ \sf \implies \frac{y}{x} = \frac{4}{5} \\ \\ \sf Multiply \: both \: sides \: by \: x: \\ \sf \implies y = \frac{4}{5} x$

$\sf \bold{ \large Substituting \ value \ of \ y \ in \ Eq_{2},} \\ \bold{ \large we \ get:} \\ \sf \implies x + \frac{4}{5} x = 27 \\ \\ \sf Put \: each \: term \: in \: x + \frac{4}{5} x \: over \: the \: common \\ \sf denominator \: 5: \\ \sf \implies \frac{5x}{5} + \frac{4x}{5} = 27 \\ \\ \sf \frac{5x}{5} + \frac{4x}{5} = \frac{5x + 4x}{5}: \\ \sf \implies \boxed{ \sf \frac{5x + 4x}{5}} = 27 \\ \\ \sf 5x + 4x = 9x : \\ \sf \implies \frac{ \boxed{ \sf 9x}}{5} = 27 \\ \\ \sf Multiply \: both \: sides \: of \: \frac{9x}{5} = 27 \: by \: \frac{5}{9} : \\ \sf \implies \frac{9x}{5} \times \boxed{\frac{5}{9}} = 27 \times \boxed{ \frac{5}{9} } \\ \\ \sf \frac{ \cancel{9} \times \cancel{5}}{ \cancel{5} \times \cancel{9}} x = x : \\ \sf \implies \boxed{x} = 27 \times \frac{5}{9} \\ \\ \sf 3 \times \cancel{9} \times \frac{5}{ \cancel{9}} = 5 \times 3 : \\ \sf \implies x = \boxed{5 \times 3} \\ \\ \sf 5 \times 3 = 15 : \\ \sf \implies x = 15$

So,

Numbers of girls in classroom = 15

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4 years ago

V - 4/5 equals 4 1/4 what does v equal

yulyashka [42]

V=5 1/20 or 101/20 hope this helps :)

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3 years ago