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3 years ago

I need to know how to do this fast

Mathematics

2 answers:

Brut [27]3 years ago

7 0

Photo math works, but just saying two step equations are pretty fun! The goal is to get the variable (x) by itself; alone on one side of the equal sign. I’m going to explain #1. 7x has to be by itself, so you will move the +9 over to the other side of the equal sign. When you move a number/thing over the equal sign, it turns negative (negative turns to positive, positive turns to negative). So, it will become 7x = 58 -9. You will do simple subtraction to get 7x = 49. Divide each side by 7 to get x by itself, and you have x = 7!

Serhud [2]3 years ago

4 0

Download photo math it works good on those kinds of problems

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HELP PLEASE!!! EASY I just haven't done algebra in a while so I forgot lol.

ElenaW [278]

Answer:

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Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

On the first day of spring, an entire field of flowering trees blossoms. The population of locusts consuming these flowers rapid

Elza [17]

Answer:

$L(t)=7600e^{0.2273t}$

Step-by-step explanation:

-The locust population grows by a factor and can therefore be modeled by an exponential function of the form:

$P=P_oe^{rt}$

Where:

$P$ is the population after t days.
$P_o$ is the initial population given as 7600
$r$ is the rate of growth
$t$ is time in days

-Given that the growth is by a factor of 5( equivalent to 500%), the r value will be 5

-The population increases by a factor of 5 every 22 days. therefore at any time instance, t will be divided by 22 to get the effective time for calculations.

Hence, the exponential growth function will be expressed as:

$P=P_oe^{rt},\ \ \ P=L(t)\\\\\therefore L(t)=7600e^{5\frac{t}{22}}\\\\=7600e^{0.2273t}$

7 0

3 years ago

The sales tax for a certain state is 7%. Which of the following situations apply the correct amount of sales tax for the given a

riadik2000 [5.3K]

Answer:

I think its c but I'm not sure. You need to ask a professional.

Step-by-step explanation:

5 0

3 years ago

The sales tax for an item was $24.50 and it cost $350 before tax. Find the sales tax rate.

Karo-lina-s [1.5K]

Find the number that when multiplied with 350 will give you 24.5. This number happens to be .07 or in terms of sales tax, 7%.

3 0

3 years ago

2. Margie Spencer wants to have $100,000 in her savings account in 20 years. If her account pays 6.6% annual

WITCHER [35]

$~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\dotfill & \$100000\\ P=\textit{original amount deposited}\\ r=rate\to 6.6\%\to \frac{6.6}{100}\dotfill &0.066\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{semiannually, thus two} \end{array}\dotfill &2\\ t=years\dotfill &20 \end{cases}$

$100000=P\left(1+\frac{0.066}{2}\right)^{2\cdot 20}\implies 100000=P(1.033)^{40} \\\\\\ \cfrac{100000}{1.033^{40}}=P\implies 27288.97\approx P$

7 0

2 years ago