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3 years ago

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Please help me. After charging for 1/3 of an hour, a phone is at 2/5 of its full power. How long will it take the phone to charg

e completely?
Decide whether each equation can represent the situation.

a. 1/3×?=2/5

b. 1/3÷2/5=?

c. 2/5÷1/3=?

d. 2/5×?=1/3

1 answer:

yanalaym [24]3 years ago

5 0

Answer:

D

Step-by-step explanation:

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What are the roots of x in -10x2 + 12x − 9 = 0?

hoa [83]

Answer:

$x_1=\frac{3(2+i\sqrt{6})}{10}$

$x_2=\frac{3(2-i\sqrt{6})}{10}$

Step-by-step explanation:

Use the Quadratic formula:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

You can identify that, in this case:

$a=-10\\b=12\\c=-9$

Now you need to substitute these values into the formula:

$x=\frac{-12\±\sqrt{12^2-4(-10)(-9)}}{2(-10)}$

$x=\frac{-12\±\sqrt{-216}}{-20}$

Remember that:

$i=\sqrt{-1}$

Therefore,rewriting and simplifying, you get:

$x=\frac{-12\±6i\sqrt{6}}{-20}$

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$x=\frac{3(2\±i\sqrt{6})}{10}$

Then, you get the following roots:

$x_1=\frac{3(2+i\sqrt{6})}{10}$

$x_2=\frac{3(2-i\sqrt{6})}{10}$

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3 years ago

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In the figure below, \overline{AD} AD start overline, A, D, end overline and \overline{BE} BE start overline, B, E, end overline

VLD [36.1K]

Answer:

<u>The measure of the arc CD = 64°</u>

Step-by-step explanation:

It is required to find the measure of the arc CD in degrees.

So, as shown at the graph

BE and AD are are diameters of circle P

And ∠APE is a right angle ⇒ ∠APE = 90°

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But it is given: ∠BPE = (33k-9)° ⇒(2)

From (1) and (2)

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Answer:

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Step-by-step explanation:

Here, we want to find the expression that shows the total number of pages in all of the news papers

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Number of students per classroom is 25

Now; the number of students in each school

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Number of students in all of the school will be;

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netineya [11]

Answer:

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ans is v=19

hope so its the ans

Step-by-step explanation:

mark as brainliest plzzz

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3 years ago

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