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taurus [48]
3 years ago
8

Can someone please help me with my homework Ignore the bottom question

Mathematics
1 answer:
pav-90 [236]3 years ago
6 0

1. x = 1    2. x = -30   3. x = -2   4. x = 15   5. x = 7, y = 11   6. x = 4, y = 1  

7. x = 1/2, y = 25/5   8. x = 1/4, y = 11/2

hope this helps :3

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Which equation is equivalent to startroot x^2 + 81 EndRoot = x + 10?
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Answer:given below

Step-by-step explanation:

sqrt x^2 +81= x + 10

x^2 + 81 = (x+10)^2

x^2 + 81 = x^2 + 20x + 100

so answer is:  

x^2 + 81 = x^2 +20x + 100

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You have 2,112 grams of a radioactive kind of mercury. How much will be left after 188 days if it's half-life is 47 days?
Anastasy [175]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
If $120.99 is charged for 654 units of electricity
pochemuha

Answer:

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Step-by-step explanation:

Amount charged = $120.99

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The cost of a unit of electricity can be determined by dividing the amount charged by the number of units used.

So that,

cost of one unit of electricity = \frac{120.99}{654}

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cost of one unit of electricity = $0.185

This implies that the cost of electricity used is charged at $0.185 per unit.

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katrin2010 [14]

Answer:

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5 0
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