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4 years ago

a cell phone battery uses 1/3 of its charge in 3/8 of a day. How much charge will it use in one day?

1 answer:

3 0

$\bf \begin{array}{ccll}charge&day\\\cline{1-2}\frac{1}{3}&\frac{3}{8}\\\\x&1\end{array}\implies \cfrac{~~\frac{1}{3}~~}{x}=\cfrac{~~\frac{3}{8}~~}{1}\implies \cfrac{~~\frac{1}{3}~~}{\frac{x}{1}}=\cfrac{3}{8}\implies \cfrac{1}{3}\cdot \cfrac{1}{x}=\cfrac{3}{8}\\\\\\\cfrac{1}{3x}=\cfrac{3}{8}\implies 8=9x\implies \cfrac{8}{9}=x$

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X + y = -15<br> rewrite in y=mx+b

diamong [38]

Answer:

y = -x - 15

Step-by-step explanation:

x + y = -15

-x -x

y = -x - 15

5 0

3 years ago

I will Mark you as brainliest if you explain

Minchanka [31]

Answer:

x=0 or x=−4

Step-by-step explanation:

Let's solve your equation step-by-step.

(x+2)2=4

Step 1: Simplify both sides of the equation.

x2+4x+4=4

Step 2: Subtract 4 from both sides.

x2+4x+4−4=4−4

x2+4x=0

Step 3: Factor left side of equation.

x(x+4)=0

Step 4: Set factors equal to 0.

x=0 or x+4=0

x=0 or x=−4

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3 years ago

Anyone know how to do this!?

Sunny_sXe [5.5K]

Answer:

nope

Step-by-step explanation:

3 0

4 years ago

Given the trinomial 3x2 − 6x + 5, what is the value of the discriminant?

yan [13]

$\bf \begin{array}{llcccll}
& 3 x^2& -6 x& +5\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array}
\\\\\\
discriminant\implies b^2-4ac\implies (-6)^2-4(3)(5)$

4 0

3 years ago

Use an area model to solve. 1 3/4 X 2 1/2

Murrr4er [49]

the answer is 1 2/1

hope this helps!!

6 0

3 years ago

a cell phone battery uses 1/3 of its charge in 3/8 of a day. How much charge will it use in one day?​

a cell phone battery uses 1/3 of its charge in 3/8 of a day. How much charge will it use in one day?