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mihalych1998 [28]
3 years ago
10

To increase the mean of 4 numbers by 2. by how much would the sum of the 4 numbers have to increase?

Mathematics
1 answer:
Orlov [11]3 years ago
4 0
So mean also translates to average so
the mean of 4 numbers is aprox
x=average
(x+x+x+x)/4=average
to increase x by 2 you add 2
x+2=average
(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2

you would have to increase the sum/total by 8 to make the numbers' averages' go up by 2
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A drawing of a garden uses a scale of 1 in 3 ft. Find the length of the drawing is 13 inches
bagirrra123 [75]
So we know each inch is 3 feet.

1:3.

13:?

So we multiply 13 by 3 to get the answer!

13:39

or 39 feet!

I hope this helped! :))

4 0
3 years ago
PLEASE HELPPP!!!!!!!!!!!!!
Leto [7]

For this case we have:

Question 1:

According to Heron's formula, the area of ​​a triangle is given by:

A=\sqrt{(s(s-a)(s-b)(s-c))}

Where a, b and c are the sides of the triangle and s is the semi-perimeter of the triangle given by:

s=\frac{(a+b+c)}{2}

Let:

a = 20mm\\b = 23mm\\c = 27mm

We have s:

s=\frac{(20+23+27)}{2}\\s=\frac{70}{2}\\s=35

Substituting in the formula of the area:

A=\sqrt{(35(35-20)(35-23)(35-27))}\\A=\sqrt{(35(15)(12)(8))}\\A=\sqrt{(50400)}\\A=224.5mm^2

Thus, the area of ​​the triangle is A = 224.5mm ^ 2

Answer:

A = 224.5mm ^ 2

Question 2:

The area of ​​a traingule can be expressed as:

A=\frac{(b*h)}{2}

Where:

b: Base of the triangle

h: Triangle height

Let:

b = 20m\\h = 18m

Substituting the values ​​in the expression we have:

A=\frac{(20*18)}{2}\\A=\frac{360}{2}\\A=180m^2

Thus, the area of ​​the triangle is A = 180m ^ 2

Answer:

A = 180m ^ 2

Question 3:

It is known that the area of ​​a rectangle is given by:

A = l * w

Where:

l: It is the length of the rectangle

w: It is the width of the rectangle

So:

l = 9 feet\\w = 8 feet

Substituting:

A = (9 * 8) feet ^ 2\\A = 72 feet ^ 2

Thus, the area of ​​Laura's carpet is given by A = 72 feet ^ 2

Answer:

A = 72 feet ^ 2

Question 4:

We must take out the area of ​​the outer wall, given by a rectangle, then:

A = l * a

Where:

l: It is the length of the rectangle

a: It is the height of the rectangle

We have:

l = 48 feet\\a = 9 feet

Substituting in the formula we have:

A = (48 * 9) feet ^ 2\\A = 432ft ^ 2

Thus, the area of ​​the exterior wall is given by: A = 432 feet ^ 2

432ft ^ 2> 400ft ^ 2

So, a can of paint is not enough to cover the exterior wall.

Answer:

A can of paint is not enough to cover the exterior wall.

Question 5:

A regular hexagon is formed by 6 equal triangles. The area of ​​the hexagon is given by:

A=\frac{(perimeter* apothem)}{2}

Where the perimeter is given by the sum of the sides, that is:

perimeter = (10 + 10 + 10 + 10 + 10 + 10) cm\\perimeter = 60cm

And the apothem is the height of each of the triangles that make up the hexagon, that is:

apothem = 5cm

Substituting in the formula:

A=\frac{(60*5)}{2}\\A=\frac{300}{2}\\A=150cm^2

Thus, the area of ​​the hexagon is A = 150cm ^ 2

Answer:

A = 150cm ^ 2


7 0
3 years ago
How would you write a term with a numerical coefficient of -5 and variable of q
nekit [7.7K]
The coefficient is just what the variable is multiplied by, so:

-5q.
7 0
2 years ago
5/2 rational or irrational
Hatshy [7]

Answer: rational

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Susan wants to make pumpkin bread and coffee cakes for the school bake sale. She has 15 eggs and 16 cups of flour in her pantry.
aev [14]
<span>15 eggs and 16 cups flour </span>
<span>Pumpkin bread (x) : 2 eggs & 3 cups of flour </span>
<span>Coffee cake (y) : 3 eggs & 4 cups of flour </span>
<span>2x + 3y ≤ 15 { number of eggs used} </span>
<span>3x + 4y ≤ 16 { number of cups of flour used } </span>
<span>Objective function </span>
<span>P = 5x + 4y</span>
6 0
3 years ago
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