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Elden [556K]
3 years ago
9

Please I need help with just 1 and 2 please!!!

Mathematics
1 answer:
jonny [76]3 years ago
7 0
The ratio of girls to boys is:
\frac{number \: of \: girls}{number  \: of \: boys}  =  \frac{10}{15}  =  \frac{2}{3}
the ratio of striped ties to to solid ties is:
\frac{number \: of \: striped \: ties}{number \: of \: solid \: ties} =  \frac{7}{21}   =  \frac{1}{3}
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When the temperature stays the same, the volume of a gas is inversely proportional to the pressure of the gas. If a balloon is f
valkas [14]

Answer:

The new pressure of the gas is 42 pounds per square inches.

Step-by-step explanation:

When the temperature remains constant, the volume of a gas is inversely proportional to the pressure of the gas.

V\propto \frac{1}{P}

We can rewrite the above equation is

\frac{V_1}{V_2}=\frac{P_2}{P_1}  [at constant temperature]

At a pressure of 14 pounds per square inches, a balloon is filled with 93 cubic inches of gas.

The volume of the gas is decreased to 31 cubic inches.

Here,

V_1= 93 cubic inches, P_1 = 14 pounds per square inches,

V_2=31 cubic inches, P_2 = ?

\frac{V_1}{V_2}=\frac{P_2}{P_1}

\Rightarrow \frac{93}{31}=\frac{P_2}{14}

\Rightarrow \frac{P_2}{14}=\frac{93}{31}

\Rightarrow {P_2}=\frac{93}{31}\times 14

\Rightarrow {P_2}=42 pounds per square inches

The new pressure of the gas is 42 pounds per square inches.

4 0
3 years ago
The temperature at 9am was 4 degrees Celsius. At 7pm the temperature was
madam [21]

Answer:

i'm not sure

Step-by-step explanation:

4 0
3 years ago
Erika calculated that she would spend $115 on school supplies this year. She actually spent $82.50 on school supplies. What is E
DerKrebs [107]
The equation to find percent error is:
percent error=(experimental-theoretical)/theoretical *100
So, (115-82.5)/82.5=0.393939*100
39.3939%, or 39.94%

Hope this helps!!
6 0
2 years ago
Read 2 more answers
Which statements describe a parallelogram that must be a square?<br><br> Select each correct answer.
Oxana [17]

That would be B, C and E.

A and D could be a rhombus.

8 0
3 years ago
Read 2 more answers
The area of a rhombus is 72 m2. One<br> diagonal is 18m. Find the other diagonal.
miskamm [114]

Answer:

Other diagonal is 8 m

Step-by-step explanation:

area of rhombus = 72 m²

½ × diagonal 1 × diagonal 2 = 72

½ × 18 × d2 = 72

9 × d2 = 72

d2 = 72/9

d2 = 8

7 0
2 years ago
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