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3 years ago

Please answer this question

Mathematics

2 answers:

gladu [14]3 years ago

8 0

Answer:

hope that helped <3

lapo4ka [179]3 years ago

4 0

2.5
Hope my answer will help you

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The sample mean is a statistic. True or false

ruslelena [56]

Answer:

true

Step-by-step explanation:

6 0

3 years ago

For a function f(x), the difference quotient is 21x2 + 21xh + 7h2 + 2. Which statement describes how to determine the average ra

aleksley [76]

Answer:

Substitute –3 for x and 5 for h in the difference quotient.

Step-by-step explanation:

The difference quotient for the function f(x) is 21x² + 21xh + 7h² + 2. Now, we know that the difference quotient equal f(x + h) - f(x) = 21x² + 21xh + 7h² + 2. The change in x is h = x₂ - x₁. So, if x changes from x = -3 to x = 2, where x₁ = -3 and x₂ = 2, h = x₂ - x₁ = 2 - (-3) = 2 + 3 = 5.

So to find the average rate of change of f(x) from x = -3 to x = 2, we substitute x = -3 and h = 5 into the difference equation f(x + h) - f(x) = 21x² + 21xh + 7h² + 2. Since, x starts at x = -3 and increases by 5 units to x = 2.

3 0

4 years ago

Today, Abigail has brought 12 sandwiches to share with friends at

horsena [70]

Answer:

58%

Step-by-step explanation:

The first thing that you have to do if figure out how many sandwiches are left we do this by the total - bad sandwiches = good sandwiches

12-5=7

There are 7 good sandwiches left. To figure out the percentage you do $\frac{part}{total}$ = $\frac{percent}{100}$ now we fill in the parts the part is 7, the total is 12 and the % is x

$\frac{7}{12}$ = $\frac{x}{100}$ now we cross multiply, 7 x 100 and 12 x X

700=12x now we divide both sides by 12 so the x is alone

x = 58.33 now we round down because it ends in.3

x=58

6 0

3 years ago

Read 2 more answers

Three students have started a fence-painting business. Working together, Pragnesh and Qazi can paint the fence in 12 hours. Simi

Mila [183]

Step-by-step explanation:

P and Q can do the whole work in 12 hours.

so, in 1 hour they can do 1/12.

P and R can do in 1 hour 1/15.

Q and R can do in 1 hour 1/20.

mathematically that looks like

P + Q = 1/12

P + R = 1/15

Q + R = 1/20

P + Q + R = 1/x

together they can do 1/x of the work in 1 hour.

it will take them x hours, if all 3 worked together.

from the first equation we get

P = 1/12 - Q

that gives us in the second equation

1/12 - Q + R = 1/15

R = 1/15 - 1/12 + Q = 4/60 - 5/60 + Q = Q - 1/60

but from the 3rd equation we get also

R = 1/20 - Q

so,

Q - 1/60 = 1/20 - Q

2Q = 1/20 + 1/60 = 3/60 + 1/60 = 4/60

Q = 2/60 = 1/30

R = Q - 1/60 = 2/60 - 1/60 = 1/60

P = 1/12 - Q = 1/12 - 2/60 = 5/60 - 2/60 = 3/60 = 1/20

so, we get for the sum :

P + Q + R = 3/60 + 2/60 + 1/60 = 6/60 = 1/10

that means in 1 hour they can do together 1/10 of the work.

so, together they will need 10 hours to paint the fence.

3 0

2 years ago

Earth titled axis affects the strength of sunlight in different places of earth's surface. If you are in an area that receiving

Anika [276]

near the north or south pole

4 0

3 years ago