Answer:
He bought 13 pkgs of gum
He bought 12 mints
He bought 4 candy bars
Step-by-step explanation:
Let +a+ = number of packages of gum Terry bought
Let +b+ = number of mints
Let +c+ = number of candy bars
------------------------------
(1) +a+=+b+%2B+1+
(2) +b+=+3c+
(3) +24a+%2B+10b+%2B+35c+=+572+ ( in cents )
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There are 3 equations and 3 unknowns, so it's solvable
(2) +c+=+b%2F3+
Substitute (2) into (3)
(3) +24a+%2B+10b+%2B+35%2A%28+b%2F3%29+=+572+
Substitute (1) into (3)
(3) +24%2A%28+b+%2B+1+%29+%2B+10b+%2B+35%2A%28+b%2F3+%29+=+572+
(3) +24b+%2B+24+%2B+10b+%2B+%2835%2F3%29%2Ab+=+572+
Multiply both sides by +3+
(3) +3%2A34b+%2B+3%2A24+%2B+35b+=+3%2A572+
(3) +102b+%2B+72+%2B+35b+=+1716+
(3) +137b+=+1644+
(3) +b+=+12+
and
(1) +a+=+b+%2B+1+
(1) +a+=+12+%2B+1+
(1) +a+=+13+
and
(2) +c+=+b%2F3+
(2) +c+=+12%2F3+
(2) +c+=+4+
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He bought 13 pkgs of gum
He bought 12 mints
He bought 4 candy bars
-----------------------
check:
(3) +24a+%2B+10b+%2B+35c+=+572+ ( in cents )
(3) +24%2A13+%2B+10%2A12+%2B+35%2A4+=+572+
(3) +312+%2B+120+%2B+140+=+572+
(3) +572+=+572+
OK
The all other 3 factors of the equation x⁴ + 2x³ − 7x² − 8x + 12 will b e(x + 2),(x - 1) and (x + 3).
Roots of an equation are the solution of that equation since an equation consists of hidden values of the variable to determine them by different processes and then the resultant is called roots.
For example root of x -4 = 0 is x = 4 so 4 will be the only root of this linear equation.
Given the equation,
x⁴ + 2x³ − 7x² − 8x + 12
If (x - 2) is a factor of the equation then it should be divisible by it.
So,
(x⁴ + 2x³ − 7x² − 8x + 12) / (x - 2) = (x³ + 4x² + x - 6)
Now divide by (x - 1) of (x³ + 4x² + x - 6)
(x³ + 4x² + x - 6) / (x - 1) = x² + 5x + 6
So,
⇒ (x - 2)(x - 1)(x² + 5x + 6)
⇒ (x - 2)(x - 1)( x² + 2x + 3x + 6)
⇒ (x - 2)(x - 1)[ x(x + 2) + 3(x + 2) ]
⇒ (x - 2)(x - 1)(x + 2)(x + 3)
Hence "The all other 3 factors of the equation x⁴ + 2x³ − 7x² − 8x + 12 will b e(x + 2),(x - 1) and (x + 3)".
To learn more about the roots of an equation,
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Answer:
Step-by-step explanation:
The given equation is:
Now, (x-2) is a factor of the given equation, therefore
Therefore, the other factors are (x-1), (x+2) and (x+3).
5x + 8y = 775 and x + y =125
5x – 8y = 125 and x + y = 775
5x + 8y = 775 and x – y = 125
5x – 8y = 125 and x – y = 775
Let x represent the number of quick washes and let y represent the number of premium washes.
1. One quick wash costs $5, then x quick washes cost $5x.
One premium wash cost $8, then y premium washes cost $8y.
They made $775 from a combination of quick and premium washes, then in total they made $(5x+8y) that is $775. The first equation is
5x+8y=775.
2. They had washed 125 cars, x cars by quick wash and y cars by premium wash, that is x+y in total. Then tha second equation is
x+y=125.
Only option A represents the situation.