3 years ago

Noah earned w dollars over the summer. Mai earned x dollars, which is y dollars more than

Mathematics

1 answer:

Wewaii [24]3 years ago

4 0

Answer:

Equation: x-w=y

Step-by-step explanation:

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PLEASE HELP!!!!! I really need help with this.

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Answer:

w = 4.66

Step-by-step explanation:

A . 4 = 18 - 3w

Transpose to find w

3w = 18 -4

3w = 14

w = 14 / 3

w = 4.66

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Ugo [173]

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4 years ago

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14.4% of what number is 10.4

Helga [31]

First, convert "of" to x and put this info into an equation:

Let n represent the unknown number.

14.4 % x n= 10.4
n = 10.4 / 14.4%
n = 72.22222
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Hope this helps!

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4 years ago

a quantity of ethanol is cooled from 47.9° C to 12.3°C and releases 3.12 KJ of heat. what is the mass of the ethanol sample?

victus00 [196]

Answer:

35.9 grams

Step-by-step explanation:

We use the formula:

$q=m*C_p*\Delta T$

Where

q is heat released

m is mass

C_p is the constant 2.44

ΔT is change in temperature

We put the info in the formula and solve for m (mass):

$q=m*C_p*\Delta T\\-3.12 = m*2.44(12.3-47.9)\\-3.12*10^3=m*(-86.864)\\m=35.9$

The mass of ethanol is 35.9 grams

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4 years ago

Round the following items to the nearest £1:

liberstina [14]

Answer:

1. Colouring Pencil 2. Notebook 3. Pencil Case

Step-by-step explanation:

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2 years ago