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3 years ago

15 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!! PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Naily [24]3 years ago

4 0

The difference between your speed is 6 miles per hour: that means that every hour you move 6 miles relative to your friend. But you only need to catch up 3 miles: half of it. So you'll catch up after 30 minutes.

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The temperature, T, of a given mass of gas varies inversely with its Volume,V. The temperature of 98 cm ³ of a certain gas is 28

Naily [24]

Answer:

T₂ = 421.4 K

Step-by-step explanation:

The temperature, T, of a given mass of gas varies inversely with its Volume,V.

$T\propto \dfrac{1}{V}\\\\V_1T_1=V_2T_2$

We have,

V₁ = 98 cm³, T₁ = 28° C = (28+273) K = 301 K

V₂ = 70 cm₃

We need to find the new temperature of the gas. Using the above relation to find T₂.

$T_2=\dfrac{V_1T_1}{V_2}\\\\T_2=\dfrac{98\times 301}{70}\\\\T_2=421.4\ K$

Hence, the required temperature of the gas is 421.4 K.

4 0

2 years ago

What is the area of the figure? ○ 45 cm² ○50 cm² ○70 cm² ○90 cm²

anyanavicka [17]

Answer:

third option; 70 cm²

Step-by-step explanation:

Rectangle:

5 x 10 = 50

Triangle:

1/2bh

18 - 10 = 8

1/2 5(8)

1/2 40

Total area:

50 + 20 = 70 cm²

5 0

2 years ago

Read 2 more answers

Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepare

fiasKO [112]

Answer:

2. Alex sent the questionnaire only to those who live near her.

Step-by-step explanation:

Given scenario is :

Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood.

She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond.

We can see that Alex sent the questionnaire to only her neighbors or people who live near her, so this will be the reason the sample will be biased.

4 0

3 years ago

The product of negative 7 and a number squared is negative 28

sertanlavr [38]

Answer:

Step-by-step explanation:

2^2=4

-7*4=-28

5 0

2 years ago

The interval increase of x^3 + 5x

Svetlanka [38]

it is 2/3 that sthe correct answer hoped ot helped u

6 0

3 years ago