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bekas [8.4K]
4 years ago
7

NEED THE ANSWER ASAP- im so confused.

Mathematics
1 answer:
makkiz [27]4 years ago
3 0

Let <em>x</em> and <em>y</em> be the two numbers.

Their sum is 140, so

<em>x</em> + <em>y</em> = 140

Twice the first number <em>x</em> is 2<em>x</em>. 5 more than this is 2<em>x</em> + 5. This is the value of the second number, so

<em>y</em> = 2<em>x</em> + 5

Substitute this into the first equation and solve for <em>x</em> :

<em>x</em> + (2<em>x</em> + 5) = 140

3<em>x</em> + 5 = 140

3<em>x</em> = 135

<em>x</em> = 135/3 = 45

Then

<em>y</em> = 2*45 + 5 = 95

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384 fl ounces of juice

Step-by-step explanation:

1 gallon=128 fluid ounce

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7 0
3 years ago
A hairdryer transfers 36,000J in one minute, what is the power rating of the hairdryer?
Verdich [7]

Answer:

1. 600 watts

2. 35640 J

3. 55%

4. 20 J

5. The cost of running the fire is 8p.

Step-by-step explanation:

1. Energy = 36 000 J , t = 1 minute = 60 seconds

Power = \frac{energy}{time}

           = \frac{36000}{60}

          = 600 watts

2. Power = \frac{work done}{time}

⇒ work done = Power × time

                      = 99 × 360

                      = 35640 J

3. Efficiency = (Output / Input) × 100

                    = \frac{55}{100} × 100

                    = 55%

4. Work done = Force × distance

                      = 5 × 4

                      = 20 J

5. Given that 1 KWh cost 2p, Power = 4 KW and time = 4 hours.

  Power = \frac{energy}{time}

Energy = Power × time

            = 4 × 4

           = 16 KWh

The cost of running the fire = \frac{16}{2}

                = 8p

3 0
3 years ago
5. Diberi g: x + px?- qx dengan keadaan p dan q ialah pemalar. Jika g(3) = 12 dan
Lelechka [254]

Answer:

subs 3 and 4 into the equation and then compare the two equation to get the value of two constants p n q

5 0
3 years ago
Robin’s scores: 99, 108, 102, 107, 119 Mean = 107; MAD = 5. 2 Evelyn’s scores: 125, 137, 138, 145, 145 Mean = 138; MAD = 5. 6 Ex
IgorLugansk [536]

The absolute distance of the Evelyn scores from her mean score is greater than the absolute distance of Robin scores from his mean score.

<h3>What is Mean?</h3>

Mean is simply defined as the average of the given set of numbers. The mean is considered as one of the measures of central tendencies in statistics. The mean is said to be an arithmetic mean. It is the ratio of the sum of the observation to the total number of observations.

<h3>What is the mean absolute deviation?</h3>

Mean refers to the average of the observation and deviation means the variation from the present standard.

Given

Robin’s scores: 99, 108, 102, 107, 119

Mean = 107

MAD = 5.2

Evelyn’s scores: 125, 137, 138, 145, 145

Mean = 138

MAD = 5.6

The absolute distance of the Evelyn scores from her mean score is greater than the absolute distance of Robin scores from his mean score.

More about the mean and the mean absolute deviation link is given below.

brainly.com/question/10258446

8 0
3 years ago
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