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4 years ago

Meghan used her cell phone for 45 minutes each day for n days. Her

Mathematics

1 answer:

Nutka1998 [239]4 years ago

4 0

Hello,

This question is very easy. :) If she use phone everyday at 45 minutes, x days => 45x use.

Later x day, She use 540 minutes.

be 45x=540

540/45 = 12

We see in the link:

brainly.com/question/16038184?answeringSource=feedPersonal%2FhomePage%2F7

Good lessons!

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Brian invests ?1900 into a savings account. The bank gives 3.5% compound interest for the first 2 years and 4.9% thereafter. How

Scorpion4ik [409]

let's check how much is it after 2 years firstly.

$\bf ~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &1900\\ r=rate\to 3.5\%\to \frac{3.5}{100}\dotfill &0.035\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{yearly, thus once} \end{array}\dotfill &1\\ t=years\dotfill &2 \end{cases} \\\\\\ A=1900\left(1+\frac{0.035}{1}\right)^{1\cdot 2}\implies A=1900(1.035)^2\implies A=2035.3275$

Brian invested the money for 6 years, so now let's check how much is that for the remaining 4 years.

$\bf ~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &2035.3275\\ r=rate\to 4.9\%\to \frac{4.9}{100}\dotfill &0.049\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{yearly, thus once} \end{array}\dotfill &1\\ t=years\dotfill &4 \end{cases}$

$\bf A=2035.3275\left(1+\frac{0.049}{1}\right)^{1\cdot 4}\implies A=2035.3275(1.049)^4 \\\\\\ A\approx 2464.54\implies \boxed{\stackrel{\textit{rounded up }}{A=2465}}$

4 0

3 years ago

<img src="https://tex.z-dn.net/?f=12%20%5Ctimes%202.6" id="TexFormula1" title="12 \times 2.6" alt="12 \times 2.6" align="absmidd

lianna [129]

This is the answer to it

8 0

3 years ago

Find the missing side lengths. Leave your answers as radicals in simplest form.<br> X<br> 45°

STALIN [3.7K]

Answer:

Step-by-step explanation:

wdym????

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3 years ago

Use addition to solve the linear system of equations.

lesya692 [45]

Here, Equations are: x - y = 6
y = x - 4
x - y = 4

Here, we can see L.H.S of both equations are equal but R.H.S is unequal so the system has no solution at all.

In short, Your Answer would be "No Solution"

Hope this helps!

3 0

3 years ago

Read 2 more answers

Write the equation of a line that includes the point (1, 5) and has a slope of 3 in slope-intercept form

Zina [86]

Answer:

y=3x+2

Step-by-step explanation:

y=mx+b

We have our m, which is slope, but we need our y intercept, b.

Substitute your slope, x, and y into the formula and solve for b.

5=3(1)+b

5=3+b

-3 -3

2=b

Now we can plug into equation.

y=3x+2

5 0

3 years ago