What is the vaule of x

Mathematics

1 answer:

Leno4ka [110]3 years ago

4 0

Answer:

one because x represent 1

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A bar of metal is cooling from 1000°C to room temperature, 22°C. The temperature, H, of the bar t minutes after it starts coolin

NemiM [27]

Answer:
I assume you're looking for a time-weighed average rather than just the [H(0) + H(60)]/2 average.
Havg = (1/60)â«[20+980e^(-0.1t)]dt (evaluated from 0 to 60)
Havg = (1/60)[20t - 98e^(-0.1t)] evaluated from 0 to 60
Havg = (1/60)[20(60) - 98e^(-6) - 20(0) + 98e^(0)] = 1297.76/60 = 21.629 Â°C

8 0

3 years ago

Unit rate for 3 ounces for every 3/4 cup

Vanyuwa [196]

Answer:

4 ounces per cup

Step-by-step explanation:

To find the unit rate, we take the ounces and divide by cups. We want a 1 in the denominator

3 ounces÷3/4 cup

Copy dot flip

3 ounces * 4/3 per cup

4 ounces per cup

7 0

3 years ago

how many liters of glycerin should be added to 12 Liters of an 8% glycerin solution so that the resulting solution contains 16%

mojhsa [17]

Answer:

1.14 liters

Step-by-step explanation:

We have 8% glycerin solution and we need to make it 16% glycerin solution [more concentration].

When we add "x" liters, we add glycerin as well as changes the total. in 12 Liters, there is 12 * 0.08 = 0.96Liters of glycerin. How much we need to add to this??

Note, 16% = 0.16

We can write a Ratio as shown below, cross multiply and solve for x:

$\frac{0.96+x}{12+x}=0.16\\(12+x)(0.16)=0.96+x\\1.92+0.16x=0.96+x\\1.92-0.96=x-0.16x\\0.96=0.84x\\x=1.14$