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Fiesta28 [93]
3 years ago
13

In a study of 200 students under 25

Mathematics
2 answers:
vlada-n [284]3 years ago
5 0

Answer:

10%

Step-by-step explanation:

Yanka [14]3 years ago
3 0
10% is the answer .........
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Your friend Mel says he has an easier way to solve this problem. Here are the first steps in his method.
damaskus [11]

Simplifying

2x2 + 6x + 4 = 24

Reorder the terms:

4 + 6x + 2x2 = 24

Solving

4 + 6x + 2x2 = 24

Solving for variable 'x'.

Reorder the terms:

4 + -24 + 6x + 2x2 = 24 + -24

Combine like terms: 4 + -24 = -20

-20 + 6x + 2x2 = 24 + -24

Combine like terms: 24 + -24 = 0

-20 + 6x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.

2(-10 + 3x + x2) = 0

Factor a trinomial.

2((-5 + -1x)(2 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve:

Simplifying

-5 + -1x = 0

Solving

-5 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '5' to each side of the equation.

-5 + 5 + -1x = 0 + 5

Combine like terms: -5 + 5 = 0

0 + -1x = 0 + 5

-1x = 0 + 5

Combine like terms: 0 + 5 = 5

-1x = 5

Divide each side by '-1'.

x = -5

Simplifying

x = -5

4 0
3 years ago
Consider the volume of a rectangular pyramid, one whose base is not square. Does changing one of the three variables (length, wi
user100 [1]

Let

L------> the length of the base of the pyramid

W-----> the width of the base of the pyramid

H-----> the height of the pyramid

V------> Volume of a rectangular pyramid


we know that

V=(1/3)*[L*W]*H

so

the three variables are going to have the same influence on the volume


example

case a) let's change the variable L (we reduce the variable by half)

L=(1/2)*L

the new volume is equal to

V new=(1/3)*[(L/2)*W]*H-----> V new=(1/2)*V

the new volume is half the original volume


case b) let's change the variable W (we reduce the variable by half)

W=(1/2)*W

the new volume is equal to

V new=(1/3)*[(W/2)*L]*H-----> V new=(1/2)*V

the new volume is half the original volume


case c) let's change the variable H (we reduce the variable by half)

H=(1/2)*H

the new volume is equal to

V new=(1/3)*[L*W]*H/2-----> V new=(1/2)*V

the new volume is half the original volume


therefore


the answer is

the three variables have the same influence on the volume

4 0
3 years ago
Read 2 more answers
What are two forms of expanded notation 0.58 using fractions
victus00 [196]

Answer:

Step-by-step explanation:

Don’t know

6 0
3 years ago
Combine the like terms 4x^2+4x+7x^2
Lostsunrise [7]

Answer:

Step-by-step explanation:

4x^2 + 7x^2 = 11x^2    Nothing else combines.

Answer: 11x^2 + 4x

x by itself is not similar in any way to x^2

8 0
3 years ago
Read 2 more answers
Evaluate this expression if x = -4 and y = -1. <br> --x^2 + 3xy^2
VladimirAG [237]
+4^2+3(-4-1)^2
16+3(5)^2
16+15^2
16+30
=46
6 0
3 years ago
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