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DaniilM [7]
4 years ago
7

Which expression is equivalent to 9x – (x – 8)(x + 1) + 10x?

Mathematics
1 answer:
forsale [732]4 years ago
3 0
The answer to this question would be =<span><span><span>−<span>x^2</span></span>+<span>26x</span></span>+<span>8 I think. Sorry if it's wrong</span></span>
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Can someone please help I tried to attempt it but it wasn’t working for me
kakasveta [241]

b. It depends on the value you assume for the power line voltage. If you assume it is 120 volts, then the ratio to battery voltage is

... (120 volts)/(1.2 volts) = 100

Power line voltage is 100 times as large as battery voltage.

_____

Please be aware of some difficulties in this question.

1. Power line voltage, even if it is "120 volts" varies over time from -170 V to +170 V, so is not really comparable to a battery's voltage, which is steady at 1.2 V.

2. The terminology "times larger" is ambiguous. When we answer the question, "how much larger is <em>a</em> than <em>b</em>," we give the response in terms of the difference a-b. Thus, if <em>a</em> is 2 times <em>larger</em> than <em>b</em>, we might be talking about the <em>difference</em> being twice the value of <em>b</em>. It is preferable to say "times as large as."

5 0
3 years ago
Please help me with my homework this is 5th grade work btw
oksano4ka [1.4K]

Answer:

21

Step-by-step explanation:

Can I have brainliest:)

3 0
3 years ago
Read 2 more answers
A tree of unknown height casts a shadow that is 18 feet long. If a person that is 5 ft 7 in casts a shadow that is 4 ft long, th
brilliants [131]

Answer:

25.

Step-by-step explanation:

5 ft 7 in = 5.583 ft.

We have 2 similar triangles here.

If h is the height of the tree, then:

h / 5.583 = 18/4

h = 18*5.583/4

h = 25.12 ft

5 0
3 years ago
Find the average rate of change<br> f(x)=x^2−6x+8 when x2=1 and x1=3
sergeinik [125]

Answer:

Average rate of change for given function is: -2

Step-by-step explanation:

Given function is:

f(x)=x^2-6x+8\\x_12= 1\\x_1 = 3

In order to find the rate of change, we have to find the value of function on x1 and x2

So,

f(x_1) = (3)^2-6(3)+8 = 9-18+8 = -1\\f(x_2) = (1)^2-6(1)+8 = 1-6+8 = 3

The formula for finding the rate of change is:

Rate\ of\ change = \frac{f(x_2)-f(x_1)}{x_2-x_1}

Putting the values, we get

=\frac{3-(-1)}{1-3}\\=\frac{3+1}{-2}\\=\frac{4}{-2}\\= -2

Hence,

Average rate of change for given function is: -2

3 0
3 years ago
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True or False: 3x + 1 &gt; 3x + 1
Vladimir [108]

Answer:

False

Step-by-step explanation:

3x+1 = 3x+1

3 0
3 years ago
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