Answer:
3a+7=5a-3
5a-3a=3+7
2a=10
a=5
Again
6b-5=2b+9
6b-2b=5+9
4b=14
b=14/4=7/2
Step-by-step explanation:
Answer:
The length of the sides are 9 units, 18 units and 11 units
Step-by-step explanation:
Let
x ----> one side of the triangle
y ----> the longest side of the triangle
z ----> the third side of the triangle
we know that
The perimeter of triangle is equal to

we have

so
----> equation A
-----> equation B
----> equation C
substitute equation B and equation C in equation A
solve for y


<em>Find the value of x</em>
---> 
<em>Find the value of z</em>
----> 
therefore
The length of the sides are 9 units, 18 units and 11 units
Cost of month plan = $40
Cost of minutes used = $0.45 after 700 minutes
Total cost = $48.10
Let x be the total minutes used
Total cost = 40 + 0.45(x - 700)
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Form the equation and solve x
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40 + 0.45(x - 700) = 48.10
40 + 0.45x - 315 = 48.10
0.45x - 275 = 48.10
0.45x = 48.10 + 275
0.45x = 323.10
x = 323.10 ÷ 0.45
x = 718
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Answer: John had used 718 mins this month
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(Remember, PEMDAS)
First find what 5^2 equal to
5 • 5 = 25
Then add 25 to 3
25 + 3 = 28
So Oc. :)
Its b because to simplify radical you multiply by in this instance sqrt of 5 on the denominator and numerator