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hjlf
3 years ago
14

Wrong Answer I report You And You Don't Get Your Points

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
3 0

1. Joe- 2+b (or 2+1b)

   Micheal- 2b

2. Joe- 2+10=12

   Micheal- 2x10=20

3. one distributes and the other just adds regularly.

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It takes 14 girls 48 minutes to finish painting a mural. How long would it take if only 4 girls painted the mural?
Wittaler [7]

Answer:

It would take 13.7142857 or 13.7, in better terms about 14 minutes.

Step-by-step explanation:

48/14 = 3.42857143

3.42857143 x 4 = 13.7142857 or 13.7.

6 0
3 years ago
Read 2 more answers
Which expression is equivalent to 6 – (–8)?
White raven [17]
-----------------------------------
Question:
-----------------------------------
6 - (-8) = 6 + 8 = 14

-----------------------------------
Options :
-----------------------------------
A) -6 + 8 = 2

B) - 6 + - 8 =-6 - 8 . = -14

C) 6 + -8 = 6 - 8 = -2

D) 6 + 8 = 14  (Answer)
4 0
3 years ago
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A model for the density δ of the earth’s atmosphere near its surface isδ=619.09−0.000097pwhere p (the distance from the center o
natta225 [31]

Answer: 3.751*10^18kg

Step-by-step explanation:

δ =619.09−0.000097p....equa1 where p (the distance from the center of the earth) is measured in meters and δ is measured in kilograms per cubic meter.

Calculating the density of air at 5km above earth surface

P = 5000m + 6370000m = 6.375*10^6m

δ = 619.09 -(.000097* 6.375*10^6)

δ = 0.715kg/m^3 = density

Since Mass = density*volume...equ2

To calculate volume of air around the spherical earth at height 5km

V = (4/3 pai R^3) - (4/3pai r^3) ...equation 3 where R =6.375*10^6m, r = 6.37*10^6

Substituting R and r in equation 2 to solve for volume of air

V = 1.085*10^21 - 1.08*10^21

V = 5.25*10^18m^3

Substituting δ and V into equation 2 to solve for mass of air

M = 0.715 * (5.25*10^18)

M = 3.751*10^18kg

8 0
3 years ago
Use mental math to find the equations that are true. Select all that apply. A. 400 ÷ 80 = 50 B. 4 , 000 ÷ 80 = 5 C. 400 ÷ 8 = 50
NeX [460]

As per the mental math calculation, the correct division equations are

C. 400 ÷ 8 = 50

D. 40,000  ÷ 800 = 50

E. 40,000 ÷ 80 = 50

Mental math calculation:

Mental math calculation means a group of skills that allow people to do math “in their head” without using pencil and paper or a calculator.

We can done any type of calculation like addition, subtraction, division etc. based on this method.

Given,

Here we have the following equations,

A. 400 ÷ 80 = 50

B. 4 , 000 ÷ 80 = 5

C. 400 ÷ 8 = 50

D. 40 , 000 ÷ 800 = 50

E. 40 , 000 ÷ 80 = 500

And we need to find the equations that are true by using the mental math calculation.

While we looking into the given expressions,

A. 400 ÷ 80 = 50

This one is false because when we cancel zero, and divide it we get 5 alone.

Then the next one is,

B. 4,000 ÷ 80 = 5

This one is false because when we cancel zero, and divide it we get 50 alone.

Third one is

C. 400 ÷ 8 = 50

This one is true because when we cancel zero, and divide it we get 50 as result.

Next is,

D. 40,000 ÷ 800 = 50

This one is true because when we cancel zero, and divide it we get 50 as result.

Final one,

D. 40,000 ÷ 80 = 500

This one is true because when we cancel zero, and divide it we get 500 as result.

Therefore, options C, D and E are true.

To know more about Mental math here.

brainly.com/question/680614

#SPJ1

8 0
1 year ago
How do quadratic functions compare to linear and exponential functions?
pashok25 [27]
Linear functions have a constant rate of change, or velocity more precisely.

Quadratic functions have a constant acceleration, or velocity of velocity.

Exponential functions have no constant rate of change, you can take derivatives all day long and the rate of change will grow or decrease as a factor of the rate...
3 0
3 years ago
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