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bazaltina [42]
4 years ago
7

Twice a number is one

Mathematics
2 answers:
deff fn [24]4 years ago
7 0

For this case we must propose a linear equation.

Let "x" be the variable that represents the unknown number.

So, we have:

2x: Represents twice the number

2x = 1: Represents that twice the number is equal to one.

We clear the value of "x":

We divide between "2" on both sides of the equation:

\frac {2x} {2} = \frac {1} {2}\\x = \frac {1} {2}

Answer:

x = \frac {1} {2}

sladkih [1.3K]4 years ago
3 0

would the answers be 0.5? i'm not sure but i tried. have a great day.

cuz half (x2) of a number (x) is (=) one..

2x=1

0.5=x

0.5x2=1

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A proportional relationship is formed when y=1 and x=-4 what is the value of x when y=4
ICE Princess25 [194]

Answer:

x = - 16

Step-by-step explanation:

The equation relating two proportional quantities is

y = kx ← k is the constant of proportionality

To find k use the condition when y = 1, x = - 4

k = \frac{y}{x} = - \frac{1}{4}

y = - \frac{1}{4} x ← equation of proportionality

when y = 4, then

4 = - \frac{1}{4} x (multiply both sides by - 4 )

x = - 16


5 0
4 years ago
Find the sum.<br>(w - 2.4) + (1 - 0.5w)​
vodka [1.7K]

The sum of the given expression { (w - 2.4) + (1 - 0.5w)​ } is 0.5w - 1.4.

<h3>What is the sum of the given expression?</h3>

Given the expression in the question;

(w - 2.4) + (1 - 0.5w)​

Remove the parenthesis

w - 2.4 + 1 - 0.5w

Collect like terms and simplify

w - 2.4 + 1 - 0.5w

w  - 0.5w - 2.4 + 1

1w  - 0.5w - 2.4 + 1

0.5w - 1.4

Therefore, the sum of the given expression { (w - 2.4) + (1 - 0.5w)​ } is 0.5w - 1.4.

Learn more algebra Problems here; brainly.com/question/723406

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8 0
2 years ago
A new health drink has 170​% of the recommended daily allowance​ (RDA) for a certain vitamin. The RDA for this vitamin is 30mg.
Anna71 [15]

Answer:

51 mg

Step-by-step explanation:

A new health drink has 170​% of the recommended daily allowance​ (RDA) for a certain vitamin. The RDA for this vitamin is 30mg.

The above question is calculated as:

RDA of the vitamin × 170%

The RDA for this vitamin is 30mg

Hence:

30mg × 170%

= 51 mg

Therefore, the milligrams of the vitamin that are in the​ drink is 51 mg

6 0
3 years ago
Solve the equation <br> 0.2 = -20a
iVinArrow [24]

Answer:

a=-0.01

Step-by-step explanation:

Divide by -20 on both sides:

0.2/-20=-20a/-20

which will be:

-0.01=a

5 0
3 years ago
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There are 650 sixth graders in the school and 338 of them are girls what percent of the sixth grade students are girls
marshall27 [118]
338/650 is .52, Which becomes 52%
7 0
4 years ago
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