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3 years ago

How does place value help me divide

Mathematics

2 answers:

bekas [8.4K]3 years ago

4 0

It helps you to divide becausey ou will know what place value it is in

Anna71 [15]3 years ago

3 0

Place value helps you divide because it helps you to know where to put the numbers

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Your food bill was $80 at a restaurant you left the tip of $16 which percentage of the food bill did you leave for the tip?

kati45 [8]

Answer:

20%

Step-by-step explanation:

Divide tip by bill.

16 / 80 = 0.2

Convert decimal to percent.

0.2 becomes 20%

7 0

3 years ago

Please HELP!

zhuklara [117]

No. the boat is 145.2 inches tall and the clearance is only 145 inches

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4 years ago

Corinne is paid weekly $356.78. What is her yearly salary?

sveticcg [70]

There are 52 weeks in a year so multiply 356.78 by 52 and you get a yearly salary of 18,552.56 (she probably didnt went to college)

6 0

3 years ago

Read 2 more answers

Z varies directly with x and inversely with y. When x=6 and y=2, .z=15. Write function that models variation. Then, find z when

tester [92]

$\bf \begin{array}{cccccclllll}
\textit{direct proportional variation}\\\\\textit{something}&&\textit{varies directly to}&&\textit{something else}\\ \quad \\
\textit{something}&=&{{ \textit{some value}}}&\cdot &\textit{something else}\\ \quad \\
y&=&{{ k}}&\cdot&x
\\
&& y={{ k }}x
\end{array}\\ \quad \\$

$\bf \textit{inverse proportional variation}\\\\
\begin{array}{llllll}
\textit{something}&&\textit{varies inversely to}&\textit{something else}\\ \quad \\
\textit{something}&=&\cfrac{{{\textit{some value}}}}{}&\cfrac{}{\textit{something else}}\\ \quad \\
y&=&\cfrac{{{\textit{k}}}}{}&\cfrac{}{x}
\\
&&y=\cfrac{{{ k}}}{x}
\end{array}$

$\bf \\\\
-------------------------------\\\\
\textit{z varies directly with x}\implies z=kx
\\\\
\textit{and inversely with y}\implies z=\cfrac{kx}{y}
\\\\\\
\textit{we also know that}\quad 
\begin{cases}
x=6\\
y=2\\
z=15
\end{cases}\implies 15=\cfrac{k\cdot 6}{2}\implies 30=6k$

$\bf \cfrac{30}{6}=k\implies \boxed{5=k}\impliedby \textit{constant of variation}
\\\\\\
thus\implies z=\cfrac{5x}{y}\\\\
-------------------------------\\\\
\textit{what's "z" when }
\begin{cases}
x=4\\
y=9
\end{cases}\implies z=\cfrac{5\cdot 4}{9}$

4 0

4 years ago

In 1927, Charles Lindbergh was the first person to fly nonstop across the Atlantic Ocean. Today, Commercial airliners fly from N

mamaluj [8]

Answer:

a. 100 mph

b. 500 mph

Step-by-step explanation:

Let the speed of Lindbergh's plane be x.

Today's planes are 5 times faster, so their speed is 5x.

Today's planes speed is 400 mph faster than Lindbergh's speed.

x + 400 = 5x

5x = x + 400

4x = 400

x = 100

Lindbergh's speed was 100 mph

b. 5x = 5 * 100 = 500

Today's planes fly at 500 mph

5 0

4 years ago