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Evgen [1.6K]
3 years ago
14

Solve equation for 3(2x - 5) - (2x - 5) = 6(4x + 5)​

Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
5 0

Answer:

the answer is negative two / x= -2

RUDIKE [14]3 years ago
3 0
<h2>>>Answer </h2>

_________

\:

\rm3(2x - 5) - (2x - 5 ) = 6(4x + 5)

\rm6x - 15 - 2x - 5 = 24x + 30

\rm4x - 20 = 24x + 30

\rm4x - 24x = 30 + 20

\rm - 20x = 50

\rm \: x  = \frac{50}{ - 20}

\rm \: x = \boxed{  - 2 \frac{1}{2} }

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Complete the equations below. 15.3 ÷ 3 = tenths + 3 15.3÷ 3 = tenths 15.3 ÷ 3 =
Helga [31]

The value of the complete equation is 5.1.

We have given the equation,

15.3 ÷ 3 = tenths + 3 15.3÷ 3 = tenths 15.3 ÷ 3

<h3>What is the equation?</h3>

An equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

Therefore we have,

15.3/3=15+0.3 \ tenths/3\\=5+0.1 \ tenths\\=5.1

Therefore the value of the complete equation is 5.1.

To learn more about the complete solution of the equation visit:

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6 0
3 years ago
Experiments on learning in animals sometimes measure how long it takes a mouse to find its way through a maze. The mean time is
Sladkaya [172]

Answer:

Option A.

Step-by-step explanation:

In an experiment a mouse took the mean time to find its way through a maze = 18 seconds.

So the mean time μ = 18

So null hypothesis says,

H₀ : μ = 18

Then a researcher thought that the mice can complete the maze faster than the time taken earlier.

So he thinks mean time taken by 10 mice will be less than 18 seconds.

Or μ < 18

Alternate hypothesis says will be

Hₐ : μ < 18

Therefore, null hypothesis and alternate hypothesis will be

H₀ : μ = 18

Hₐ : μ < 18

Option A. will be the answer.

4 0
3 years ago
Calvin deposits $400 in a savings account that accrues 5% interest compounded monthly. After c years, Calvin has $658. 80. Makay
Drupady [299]

The approximate difference between Calvin and Makayla's number of years of money invested is 2 years.

<h3>What is compound interest?</h3>

Compound interest is the amount charged on the principal amount and the accumulated interest with a fixed rate of interest for a time period.

The formula for the final amount with the compound interest formula can be given as,

A=P\left(1+\dfrac{r}{t}\right)^{t}

Here, A is the final amount (principal plus interest amount) on the principal amount of P with the rate of r in the time period of t.

Calvin deposits $400 in a savings account and Interest rate is 5 present compounded monthly.

As the final amount Calvin has $658.80 in c years. Thus the monthly compound interest can be given as,

658.8=400\left(1+\dfrac{5}{12\times100}\right)^{12c}\\\dfrac{658.8}{400}=\left(\dfrac{1205}{1200}\right)^{12c}\\c\cong10\rm years

Now Makayla deposits $300 in a different savings account that accrues 6% interest compounded quarterly. The final amount she gets is $613.4 in m years. Thus,

613.4=300\left(1+\dfrac{6}{12\times100}\right)^{12m}\\\dfrac{613.4}{300}=\left(\dfrac{1206}{1200}\right)^{12m}\\c\cong12\rm years

Thus, the approximate difference in the number of years that Calvin and Makayla have their money invested is 2 years.

Learn more about the compound interest here;

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5 0
2 years ago
3x - 2x^2 + 7 - 3x^2
inn [45]
3x-2x^2+7-3x^2
=3x-2x^2-3x^2+7
=3x-5x^2+7
=-5x^2+3x+7 that’s how it’s solved and that’s the answer as well. Come back for help
7 0
3 years ago
Express 9680 in scientific notation
vodomira [7]
Scientific\ notation:a\times10^n\ where\ a\in[1;\ 10)\ and\ n\in\mathbb{Z}


9680=9\underbrace{680}_{\leftarrow 3}=9.680\times10^3=9.68\times10^3
5 0
4 years ago
Read 2 more answers
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