No estoy segura e -2 ao quadrado esa es toda la pregunta
The trick is to write appropriate equations and then solve the system of equations you've created.
"sum of two numbers is -5:" x + y = -5
"difference is -1:" x-y = -1
Add these two equations together. This will cause y to drop out, and you will be left with an equation in x alone:
2x = - 6, so x = -3. Subst. -3 for x in either equation, above, and find the corresponding y value.
Then write your solution as (-3, y ) (write in your value for y).
Answer: p=0.87 (density of oil), m=37.5 (mass of liquid), v=11.92 (volume of liquid)
Step-by-step explanation:
p=m/v
p=43.5/50
p=0.87 (density of oil)
m=pv
m=2.5x15
m=37.5 (mass of liquid)
v=m/p
v=65/5.45
v=11.93 (volume of liquid)
Answer:
im not 100% sure but i think its the last one
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im not 100% sure though
Step-by-step explanation:
Answer:
Your answer is 0 (zero).
<u>Step</u><u> </u><u>by</u><u> </u><u>Step</u><u> </u><u>Explanations</u><u>:</u>
<u>For</u><u> </u><u>mean</u><u>:</u>
1. Add all the numbers; which is 90
2. Divide by how numbers there are, for this case there are 6 numbers; 90/6 = 15
3. Your mean is 15
For Median:
1. Order the numbers from lest to greatest. Ex: 8, 10, 12, 18, 20, 22
2. Find the middle number(s), which are 12 &18
3. Add; 12 + 18 = 30
4. Divide; 30/2 =15
5. Your Median is 15
So now the question asks "what's the difference?" which means subtraction: 15 - 15 = 0
