Answer:
20x + 13
Step-by-step explanation:
5(4x + 3) - 2
5× 4x + 5×3 - 2
20x + 15 - 2
20x + 13
Answer:
$13.00
Step-by-step explanation:
Let f represent the price per foot of pasture fence, and p represent the price per foot of picket fence. The two purchases can be written in equation form as ...
2000f + 450p = 12850
700f +300p = 6350
Using Cramer's rule, we can find the value of the picket fence as ...
p = (12850·700 -6350·2000)/(450·700 -300·2000) = -3705000/-285000
p = 13
The cost per foot of picket fence is $13.00.
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<em>Cramer's Rule and Vedic math</em>
The above equation for p is a summary of the math you would be doing if you were to solve the equations by eliminating f. Cramer formulates it in terms of determinants of the coefficients in the equations. Practitioners of Vedic math formulate it in terms of X-pattern combinations of the coefficients in much the same way as finding a determinant. For the equations ...
The solutions are ...
∆ = bd -ea
x = (bf -ec)/∆
y = (cd -fa)/∆ . . . . . this is the equation we used above
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If you do a rigorous comparison of this formula with that of Cramer's rule, you find the signs of numerator and denominator are reversed. That has no net effect on the solution, but it makes the X pattern of products easier to remember for practitioners of Vedic math.
Answer:
multiply each term in one polynomial by each term in the other polynomial.
add those answers together, and simplify if needed.
Step-by-step explanation:
Answer:
1 hour 42 minutes
Step-by-step explanation:
Given: Speed of 1st trucker= 62 mph
Speed of 2nd trucker= 66 mph
Total distance need to cover to be in contact is 270 miles
1st trucker start 1 hour ahead of 2nd trucker
Lets assume 2nd trucker take `x` hours to be in contact and 1st trucker take `(x+1)` hours.
We know, distance= 
1st trucker, distance
∴ 
2nd trucker, distance
∴
Now, putting the values in an equation.
⇒ 
Opening the parenthesis to solve and subtracting both side by 62
⇒ 
∴ x= 
= 1 hour 42 minutes
∴ It will take 1 hour 42 minutes to be able contact each other after first trucker leaves.
Answer:
-48.6
Step-by-step explanation:
