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3 years ago

If 2x+5= 12 for some value of x, then what does 6x+20 equal???

Mathematics

2 answers:

ANEK [815]3 years ago

6 0

1. Solve for x in 2x + 5 = 12
2x + 5 = 12 Subtract 5 from both sides.
2x = 7 Divide 2 from both sides.
x = 3.5

2. Substitute 3.5 in for x in 6x + 20
6(3.5) + 20
21 + 20
41

Your answer is 41.

Morgarella [4.7K]3 years ago

5 0

Here is the answer to the question

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<img src="https://tex.z-dn.net/?f=32.5%20%3D%2030%20%2B%20%20%5Cfrac%7B20%20-%20%2840%20%2B%20x%29%7D%7B12%7D%20%20%5Ctimes%2010

erastova [34]

Answer:

$x = - 23$

Step-by-step explanation:

$\frac{20 - (40 + x)}{12} \times 10 = 32.5 - 30 = 2.5$

$= > \frac{20 - (40 + x)}{12} = 0.25$

$= > \frac{20 - (40 + x)}{12} = \frac{1}{4}$

$= > 20 - (40 + x) = \frac{12}{4} = 3$

$= > 40 + x = 20 - 3 = 17$

$= > x = 17 - 40 = - 23$

7 0

3 years ago

Does the equation y = x(x - 3) represent a linear function

Flauer [41]

Answer:

Step-by-step explanation:

No. You can see why if you remove the brackets.

y=x^2 - 3x.

A linear function must have x and y with powers of 1. Also it can't something like x^2 - y^2 = 5

x^2 - y^2 = 0 is the only exception I can think of, but that really is a system of equations. If you graph it. you get two equations which cross at 0 and nowhere else.

7 0

3 years ago

A coach divided his team into two groups of equal size.

DerKrebs [107]

Applying the percentages, and considering that 70% of the first group drinks at least 2 glasses of water a day, it is found that 0.725 = 72.5% of the team drinks at least 2 glasses of water a day.

The team is divided into two equal groups, hence, each represents 50%.

The <em>percentages </em>associated with drinking at least 2 glasses of water a day is:

70% of 50%(first group)
75% of 50%(second group)

Hence, applying the weighed percentage, the total percentage is:

$T = 0.7(0.5) + 0.75(0.5) = 0.725$

0.725 = 72.5% of the team drinks at least 2 glasses of water a day.

A similar problem is given at brainly.com/question/1517088

4 0

3 years ago

Multiply 6.75x10^6 and 1.2x10^6 Keep the numbers written in scientific notation when you are solving the problem Show all of you

harkovskaia [24]

Answer:

8.1×10^12

Step-by-step explanation:

6.75×1.2=8.1 and power should be added 6+6=12 and answer is 8.1×10^12

4 0

2 years ago

Order from least to greatest v/79, 8.7, 26/3, 8.83

Ganezh [65]

In order from least to greatest is 8.7, 8.83, 26/3, 79

5 0

3 years ago