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2 years ago

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The cost y (in dollars) to spend an evening bowling is proportional to the number of games x that are bowled. It costs $16 to bo

wl 4 games. Write an equation that represents the situation.

1 answer:

svp [43]2 years ago

7 0

X=(-16)-4 is one equation

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Wesley and brian have a total of 87 baseball cards. Wesley have 30 less than twice as many cards as brian. How many baseball car

d1i1m1o1n [39]

Brian has 39 cards and Wesley has 48 cards

Step-by-step explanation:

Let w be the number of cards Wesley has

and

b be the number of cards Brian has

Then

$w+b = 87\ \ \ \ Eqn\ 1\\w = 2b-30\ \ \ Eqn\ 2$

Putting w = 2b-30 in equation 1

$2b-30+b = 87\\3b = 87+30\\3b = 117$

Dividing both sides by 3

$\frac{3b}{3} = \frac{117}{3}\\b = 39$

Putting b=39 in equation 2

$w = 2(39)-30\\w = 78-30\\w = 48$

Hence,

Brian has 39 cards and Wesley has 48 cards

Keywords: Linear equations, variables

Learn more about linear equations at:

#LearnwithBrainly

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2 years ago

A team won 6 hockey matches and lost 9 matches. what per cent of the matches did the team win

Mama L [17]

Answer:

66.67%

Step-by-step explanation:

total matches = 9

matches won = 6

percentage = matches won*100/ total matches

percentage = 600/9

= 66.67%

7 0

2 years ago

Read 2 more answers

There are 450 seats in the lower level of a concert hall with b balcony seats in the upper level. So far, 170 tickets have been

slamgirl [31]

There are 400 balcony seats in the concert hall.

<u>Step-by-step explanation</u>:

Step 1 :

The number of lower seats = 450 seats

Total seats = Lower seats + balcony seats

Step 2 :

Tickets sold = 170 tickets
Total tickets = x

Tickets sold = 1/5 of total tickets.

⇒ 170 = (1/5)x

⇒ x = 5 $\times$ 170

⇒ x = 850 tickets

∴ Total seats in the concert hall is 850.

Step 3 :

Total seats = 450 + balcony seats

850 - 450 = balcony seats

∴ balcony seats = 400

7 0

2 years ago

What is 14.9 divided by 0.02

Lelechka [254]

The answer is 745. Doesn't math make sense ?

4 0

2 years ago

The weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from th

bazaltina [42]

$\bf \qquad \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}$

"<span>The weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth"

namely "w" varies inversely to </span> $\bf d^2$ or $\bf w=\cfrac{k}{d^2}$

then
"<span>A particular person weighs 192 pounds on the surface of the earth and the radius of the earth is 3900 miles. "
</span>namely when w = 192, d = 3900

so $\bf w=\cfrac{k}{d^2}\qquad 
\begin{cases}
w=192\\
d=3900
\end{cases}\implies 192=\cfrac{k}{3900^2}
\\\\\\
\textit{solve for "k", to find the}\\
\textit{"constant of variation"}\\
\textit{once you've found it, plug it back in at }w=\cfrac{k}{d^2}$

7 0

2 years ago