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3 years ago

7(x -3)=4(x+5) solve for X thanks!!

Mathematics

2 answers:

kozerog [31]3 years ago

7 0

$\text{Hello there!}\\\\\text{Solve for x:}\\\\7(x -3)=4(x+5)\\\\\text{Distribute the 7 to the variables inside the parenthesis}\\\\7x-21=4(x+5)\\\\\text{Distribute the 4 to the variables inside the parenthesis}\\\\7x-21=4x+20\\\\\text{Subtract 4x from both sides}\\\\3x-21=20\\\\\text{Add 21 to both sides}\\\\3x=41\\\\\text{Divide both sides by 3}\\\\x=41/3\\\\\boxed{\text{x = }\frac{41}{3}}}$

Alisiya [41]3 years ago

6 0

Answer:

13.66

Step-by-step explanation:

In the picture above

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3 years ago

If a line passes through the point (1,9) and has a slope of 6 , write it as an equation

vovikov84 [41]

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3 years ago

Read 2 more answers

Find the values of s_1 and r for a geometric sequence with s_4= 18 and s_6= 72<br>

dmitriy555 [2]

<h3>Answer: Choice A</h3>

$s_1 = 2.25, \ r = 2$

============================================

Work Shown:

$s_4 = 18\text{ is the fourth term}\\\\s_5 = r*s_4 = 18r\\\\s_6 = r*s_5 = r*(18r) = 18r^2 = 72\\\\\text{So,}\\\\18r^2 = 72\\\\r^2 = \frac{72}{18}\\\\r^2 = 4\\\\r = \sqrt{4}\\\\r = 2$

Use that r value and $s_4 = 18$ to find the first term

$s_n = s_1*(r)^{n-1}\\\\s_4 = s_1*(2)^{4-1}\\\\18 = s_1*8\\\\s_1 = \frac{18}{8}\\\\s_1 = 2.25$

You could use $s_6 = 72$ in place of $s_4 = 18$ (just make sure to use n = 6 instead of n = 4).

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3 years ago