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3 years ago

(5x+2) = (7x-12) Ineed help!

2 answers:

7 0

X = 7
Explaination:
Take away 5x from both sides you have 2x on the right, then add 12 to both sides you have 14 on the other side (left), you then divide by 2 and get 7 = x.
Now if you need you can solve the two equations, 5(7)+2 = 37, and 7(7)-12= 37.

spayn [35]3 years ago

4 0

Answer:

(5x+2) = (7x-12)

=x=7

Step-by-step explanation:

the answer is 7

you gotta move the variables

collect like terms then divide

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k0ka [10]

Answer: a = 3

Step-by-step explanation: since M is in between the two points you can look at the x and y coordinates respectively and find the difference between the the given points and then add it to the midpoint

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3 years ago

Jordan was asked to convert 345,000,000 to scientific notation. His response was 34.5*10^7. His teacher told him he was incorrec

mel-nik [20]

Step-by-step explanation:

The scientific notation of any number is given by :

$N=a\times 10^b$

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3 years ago

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3 years ago

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A geometric series has second term 375 and fifth term 81 . find the sum to infinity of series .

Eduardwww [97]

Answer: $\bold{S_{\infty}=\dfrac{3125}{2}=1562.5}$

<u>Step-by-step explanation:</u>

a₁, 375, a₃, a₄, 81

First, let's find the ratio (r). There are three multiple from 375 to 81.

$375r^3=81\\\\r^3=\dfrac{81}{375}\\\\\\r^3=\dfrac{27}{125}\qquad \leftarrow simplied\\\\\\\sqrt[3]{r^3} =\sqrt[3]{\dfrac{27}{125}}\\ \\\\r=\dfrac{3}{5}$

Next, let's find a₁

$a_1\bigg(\dfrac{3}{5}\bigg)=375\\\\\\a_1=375\bigg(\dfrac{5}{3}\bigg)\\\\\\a_1=125(5)\\\\\\a_1=625$

Lastly, Use the Infinite Geometric Sum Formula to find the sum:

$S_{\infty}=\dfrac{a_1}{1-r}\\\\\\.\quad =\dfrac{625}{1-\frac{3}{5}}\\\\\\.\quad =\dfrac{625}{\frac{2}{5}}\\\\\\.\quad = \dfrac{625(5)}{2}\\\\\\.\quad = \large\boxed{\dfrac{3125}{2}}$

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3 years ago