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lesya [120]
3 years ago
10

1. A stereo speaker in the shape of a triangular pyramid has a height of 6 inches. The area of the base of the speaker is 11 squ

are inches.
F 22 in.3

G
198 in.3

H
66 in.3

J
33 in.3

2. What is the solution to this equation?
2x + 10 = 28
plz help :(
Mathematics
1 answer:
Pie3 years ago
3 0
Okay for number 1, even though there isn’t a question to answer, my best guess would be H, 66 in^3.

i multiplied the height (6) by the base (11) to get the 66.

———

for number 2, here’s what you should do.
2x + 10 = 28
- 10 -10
(subtract 10 from both sides of the equal sign)

you should get..
2x = 18
divide by 2 to get the x by itself..
x=9

and there u go! lmk if i helped u out babe
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Two kg of tea and 3 kg of sugar cost rupees 39 in january 1997, However in march 1997 the price of the tea increased by 25% and
Irina18 [472]

Answer: tea = 15 rupees  per kg

sugar= 3 rupees per kg

Step-by-step explanation:

Hi, to answer this question we have to write a system of equations with the information given:

<em>"Two kg of tea and 3 kg of sugar cost rupees 39 in january 1997": </em>

2 t + 3 s =39 (a)

Where:

  • t= price of 1 kg of tea
  • s = price of 1 kg of sugar

<em>"in march 1997 the price of the tea increased by 25% (1.25)and the price of the sugar increased by 20%(1.20) and the same quantity of tea and sugar cost rupees 48.30. "</em>

2(t1.25)+3(s1.2) = 48.30 (b)

  • <em>Solving for t in (b) </em>

2t =39-3s

t = (39 -3s)/2

t = 19.5-1.5s

  • <em>Replacing the value of t in (b) </em>

2 x ((19.5-1.5s)1.25)+ 3 ( 1.2s) =48.30

2x ( 24.375 -1.875s) +3.6s =48.30

48.75 -3.75s+3.6s= 48.30

48.75-48.30 = 3.75s-3.6s

0.45= 0.15s

0.45/0.15 =s

3 =s

  • <em>Replacing the value of s in (a) </em>

2 t + 3 (3) =39

2 t + 9 =39

2 t =39 -9

2 t =30

t = 30/2

t= 15

Prices in january:

tea = 15 rupees per kg

sugar= 3 rupees per kg

Feel free to ask for more if needed or if you did not understand something.

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22−2x<38

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Divide each side by -2, remembering to flip the inequality

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