Ask question

Ask question

All categories

3 years ago

9

a dance club spent $922 on 40 items.The item include some hats and pairs of shoes.Each hat cost $19 and each pair of shoes cost

$25.How many pairs of shoes did the dance club buy?

1 answer:

Sergio039 [100]3 years ago

4 0

1. H+S=40

2. 19H+25S=922

From 1,

19H+19S=760

Subtract this from 2 to eliminate H,

19H+25S-19H-19S=922-760

6S=162

Solve for S, then use either equation to solve for H.

You might be interested in

Xavier surveyed a random sample of the grade levels of the Spanish Club members in the county. The bar graph shows the results o

pishuonlain [190]

Answer:

80

Step-by-step explanation:

If you add each value it equals 30.

30x10=300 so 8 (value of the 9th grade bar) times 10 equals 80.

8 0

3 years ago

Read 2 more answers

What is the area of the figure?

Alla [95]

B. 36
because if you find the area of the big square its 5×6 and the smaller rectangle is 3×2
so its 30+6
36

3 0

3 years ago

Find the critical numbers sin^2x+cosx 0 < x< 2pi

ryzh [129]

$\bf sin^2(x)+cos(x)\iff [sin(x)]^2+cos(x)\\\\
-----------------------------\\\\
\cfrac{dy}{dx}=2sin(x)cos(x)-sin(x)\implies 0=2sin(x)cos(x)-sin(x)
\\\\\\
0=sin(x)[2cos(x)-1]\implies 
\begin{cases}
0=sin(x)\\
sin^{-1}(0)=\measuredangle x\\
\pi \\
----------\\
0=2cos(x)-1\\\\ \frac{1}{2}=cos(x)\\\\ cos^{-1}\left( \frac{1}{2} \right)=\measuredangle x\\\\ \frac{\pi }{3},\frac{5\pi }{3}
\end{cases}$

5 0

3 years ago

The dosage for a certain drug calls for 20mg per kg per day and is divided into two doses(1every 12 hours) if a person weighs 19

podryga [215]

Answer:

893.42

Step-by-step explanation:

1kg=2.205pounds

so 20mg is for 2.205pounds

therefore for 197pounds will be 1784.84mg

but the dose is once every 12hrs meaning twice a day so divide 1784.84/2 to get the pounds

4 0

3 years ago

A fast car travels 420 miles in a period of 210 minutes. What is the adverage rate of change of distance of the car in miles per

nikitadnepr [17]

If you would like to know the average rate in miles per hour, you can calculate this using the following steps:

420 miles ... 210 minutes
x miles = ? ... 1 hour = 60 minutes

420 * 60 = 210 * x
x = 420 * 60 / 210
x = 120 miles

The correct result would be 120 miles per hour.

7 0

3 years ago