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3 years ago

11d - 16( -18 - 19d) Combine Like Terms

Mathematics

2 answers:

kicyunya [14]3 years ago

4 0

Answer:

315D+228

Step-by-step explanation:

First you need to distribute and then combine like terms

timofeeve [1]3 years ago

4 0

Answer:

the answer should be

315d+288

Step-by-step explanation:

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Last year, Keiko had $20,000 to invest. She invested some of it in an account that paid %7 simple interest per year, and she inv

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Answer:

$P_2 = \$6,000\\P_1 = \$14,000$

Step-by-step explanation:

The formula of simple interest is:

$I = P_0rt$

Where I is the interest earned after t years

r is the interest rate

$P_0$ is the initial amount

We know that the investment was $20,000 in two accounts

_______________________________________________

For the first account r = 0.07 per year.

Then the formula is:

$I_1 = P_1r_1t$

Where

$P_1$ is the initial amount in account 1 at a rate $r_1$ during t = 1 year

$I_1 = P_1(0.07)(1)\\\\I_1 = 0.07P_1$

For the second account r = 0.05 per year.

Then the formula is:

$I_2 = P_2r_2t$

Where

$P_2$ is the initial amount in account 2 at a rate $r_2$ during t = 1 year

Then

$I_2 = P_2(0.05)(1)\\\\I_2 = 0.05P_2$

We know that the final profit was I $1,280.

$I = I_1 + I_2=1,280$

Substituting the values $I_1$ , $I_2$ and I we have:

$1,280 = 0.07P_1 + 0.05P_2$

As the total amount that was invested was $20,000 then

$P_0 = P_1 + P_2 = 20,000$

Then we multiply the second equation by -0.07 and add it to the first equation:

$0.07P_1 + 0.05P_2 = 1.280\\.\ \ \ \ \ \ \ \ +\\-0.07P_1 -0.07P_2 = -1400\\-------------$

$-0.02P_2 = -120\\\\P_2 = 6,000$

Then $P_1 = 14,000$

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3 years ago

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3 years ago

The value of almost everything you own (assets), such as a car, computer, or house, depreciates (goes down) over time. when an a

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The final value of the truck after depreciation and the number of years you own the truck are the two variables in this problem.

The dependent variable is the final value of truck after depreciation and the independent variable is the number of years you own the truck.

We are given that the initial value of truck is $12,400 and depreciation value per year is $820.

We know that,

Final Value = Initial Value - Depreciation value per year * Number of years

Let Final value be y

Let the number of years be x.

Hence, the equation will be:-

y = 12400 - 820*x

y = 12400-820x

We can clearly see from the equation that the final value of truck will depend on the number of years you own the truck.

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2 years ago

Any one smart and can help me catch up? ill give many points

Sergio [31]

Answer:

4/15

Step-by-step explanation:

1) find common denominator, 15 in this problem

$\frac{4}{5}= \frac{12}{15}$

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3 years ago

The mean hourly wage for employees in goods-producing industries is currently $24.57 (Bureau of Labor Statistics website, April,

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Answer:

Step-by-step explanation:

a) H0: $\bar x = 24.57$

Ha: $\bar x \neq 24.57$

(Two tailed test at 5% significance level)

b) n=30

Mean difference = $23.89-24.57 = - 0.68$

Std error of mean = $\frac{s}{\sqrt{n} } \\=\frac{2.40}{\sqrt{30} } \\=0.4382$

b) Test statistic t = mean diff/std error = -1.552

df = 30-1 =29

p value=0.0657

c) Since p > 0.05 our signi. level, we accept null hypothesis.

There is no significant difference between the means.

d) Using critical value we find that test statistic is > critical value left

So accept H0

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3 years ago