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2 years ago

Simplify each expression by combining like terms -3x + 12x =

Mathematics

2 answers:

lesantik [10]2 years ago

4 0

Answer:

Step-by-step explanation:

hshdhdhdxhhxhxhxhxhxhxhxhhxhxhxhhx

lara [203]2 years ago

3 0

Answer:

9x or 15x

Step-by-step explanation:

-3x + 12x = 9x

-3 + 12 = 9,

or if you just straight out add

-3x + 12x = 15x

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Dvinal [7]

Answer:

4 14/25

Step-by-step explanation:

4.56 = 4 56/100 = 4 14/25

6 0

3 years ago

Read 2 more answers

Enter the x-coordinate of the solution to this system of equations

Kitty [74]

Answer:

equation 2into minus 3 into equation 1

8x+ 3y= -28

-3x-3y=18

----------------

5x=10

x =2

put value of y in equation 2

8 into 2+3y=-28

16+3y= -28

3y= -28+16

3y= -12

y= -4

5 0

3 years ago

The price of a pair of shoes is $28. The sales tax rate is 2.39 percent. What is the total amount you would pay if you bought th

Ilia_Sergeevich [38]

You would have to pay a total of $28.67

3 0

3 years ago

A jacket's original price is 65.00. it is on sale for 40% off. you have to pay 5% sales tax. what is the final price for the jac

nekit [7.7K]

40% of 65.00=0.40×65=26
65-26=39(your price)

sales tax(5%)=0.05×39=1.95 tax

39+1.95
=40.95(total)

3 0

3 years ago

A country's population in 1994 was 182 million. In 2002 it was 186 million. Estimate the population in 2004 using the exponentia

iogann1982 [59]

$\bf =ae^{kt}\qquad 
\begin{cases}
1994\impliedby \textit{year 0, starting point}\\
t=0\qquad P=182
\end{cases}\implies 182=ae^{k0}
\\\\\\
182=a\cdot e^0\implies 182=a\cdot 1\implies 182=a
\\\\\\
thus\qquad P=182e^{kt}\\\\
-------------------------------\\\\$

$\bf P=182e^{kt}\qquad 
\begin{cases}
2002\impliedby \textit{8 years later}\\
t=8\qquad P=186
\end{cases}\implies 186=182e^{k8}
\\\\\\
\cfrac{186}{182}=e^{8k}\implies ln\left( \frac{93}{91} \right)=ln(e^{8k})\implies ln\left( \frac{93}{91} \right)=8k
\\\\\\
\cfrac{ln\left( \frac{93}{91} \right)}{8}=k\implies 0.0027\approx k\implies \boxed{P=182e^{0.0027t}}$

what's the population in 2004? well, from 1994 to 2004 is 10 years later, so t = 10

plug that in, to get P for 2004

3 0

3 years ago