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3 years ago

Is this correct? Explain. 48 - 24k = 12 (4 - 2k)

Mathematics

2 answers:

VLD [36.1K]3 years ago

7 0

It is correct because if you do the math you will come up with 48 - 24k = 48 - 24k

Ilia_Sergeevich [38]3 years ago

6 0

It is correct because when you simplify the expression on the right side, you will end up with the same expression that is to the other side of it.

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A line of best fit predicts that when x equals 28 y will equal 27.255 but y actually equals 26 what is the residual in this case

Kobotan [32]

Answer:

The answer is -1.255 for residual value.

Step-by-step explanation:

We are tasked to solve for the residual value given that when x equals 29, y will be equals to 27.255. But, when it is tested, y actual value is 26. The formula in solving residual is shown below:

Residual value = Observed value - predicted value

Residual value = 26 - 27.255

Residual values = -1.255

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3 years ago

there are 18 boys and 12 girl in math class. what is the ratio of girls to total students. A. 18:30 B. 12:30 C. 30:12 D. 30:18 2

zmey [24]

Answer:

1. B

2. B and C

3.C

4.B the answer is 238 but i guess the rounded

Step-by-step explanation:

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3 years ago

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What value of c makes the polynomial below a perfect square? 4x2 + 12x + c?

Tema [17]

This is what we know:4x^2 + 12x + c = (2x + k)^2
<span> 4x^2 + 12x + c = 4x^2 + 2kx + 2kx + k^2
c=9
</span>

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3 years ago

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Assuming that n 1 , rewrite the compound interest equation B t 900 1.185 t in the general form.

Rufina [12.5K]

$\bf \qquad \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\\
r=rate\to r\%\to \frac{r}{100}\\
n=
\begin{array}{llll}
\textit{times it compounds per year}
\end{array}\\
t=year
\end{cases}$

$\bf 1.185\implies 1+0.185\qquad\quad and\quad n=1
\\\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}\implies A=P\left(1+0.185\right)^{nt}\implies A=P\left(1+\frac{0.185}{1}\right)^{1\cdot t}$

so, the percentage of the rate is 0.185, what's that as a percentage? well, 0.185 * 100, 18.5%.

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3 years ago

A students cost for last semester was $2100. She spent $420 of that on books. What percent of last semesters college cost was sp

kati45 [8]

the answer would be 20% on the books

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3 years ago