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Pie
3 years ago
9

A lady bought plates and bowls, 24 items in all. The price of each bowl was 60 cents; the price of each plate was 75 cents. The

cost of the whole purchase was $15. How many plates did the lady buy?
Mathematics
1 answer:
vova2212 [387]3 years ago
6 0
Plate    bowl         total
.60          .75          1.35
8.4(14)     7.5(10)    15.9
7.8(13)      8.25(11)  16.05
9.6(16)      6(8)          15.6
9(15)         6.75(9)     15.75
13.8(23)   .75           14.55
13.2(22)    1.5(2)     14.7
12.6(21)     2.25(3)  14.85
12(20)      3(4)         15



answer: 4
 
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a city got 40 inches of rain in 2012 in 2013 it got 44.8 inches what was the percent increase? help fast ​
Alex777 [14]

Answer:

10.2% increase

Step-by-step explanation:

44.8-40 = 4.8

4.8/40 = 10.2

6 0
3 years ago
15. The length of each edge of a regular tetrahedron,
grigory [225]

Slant height of tetrahedron is=6.53cm

Volume of the tetrahedron is=60.35\mathrm{cm}^{3}

Given:

Length of each edge a=8cm

To find:

Slant height and volume of the tetrahedron

<u>Step by Step Explanation: </u>

Solution;

Formula for calculating slant height is given as

Slant height=\sqrt{\frac{2}{3}} a

Where a= length of each edge

Slant height=\sqrt{\frac{2}{3}} \times 8

                     =\sqrt{0.6667} \times 8

                     =0.8165 \times 8=6.53cm

Similarly formula used for calculating volume is given as

Volume of the tetrahedron=\frac{a^{3}}{6 \sqrt{2}}

Substitute the value of a in above equation we get

Volume=\frac{8^{5}}{6 \sqrt{2}}

            =\frac{512}{6 \sqrt{2}}

            =\frac{512}{6 \times 1.414}

Volume=512 / 8.484=60.35\mathrm{cm}^{3}

Result:

Thus the slant height and volume of tetrahedron are 6.53cm and 60.35\mathrm{cm}^{3}

7 0
3 years ago
Please help me with this!<br> I will give you a thanks!
Grace [21]
-2 + 6
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4 0
3 years ago
Read 2 more answers
I don't know how to do three and four
xenn [34]
Angle 3 is also 104: and angle 5 and 2 are 76: and angle 6 is 104: 3 and 8 are 104: and 7 and are 76

angle 1 and 6 are verticle angles 
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5 0
3 years ago
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20 POINTS<br> HELP ME PLEASE<br> How many solutions does the system have
finlep [7]

Answer:

Two

Step-by-step explanation:

x² + 4 = 4x + 1

x² - 4x + 3 = 0

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x(x - 3) - (x - 3) = 0

(x - 3)(x - 1) = 0

x = 1, 3

y = 4(1) + 1 = 5

y = 4(3) + 1 = 13

Two solutions: (1,5) (3,13)

3 0
3 years ago
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