Answer:
134 children and 120 adult plates were served
Step-by-step explanation:
let the children mean be x
Let the adult meal be y
If fourteen less children’s meals were served than adult meals at a barbecue, then;
y = x - 14 .... 1
IF Children plate were 1.50 each and adult plates were 2.00 each with a total of 441 in amount then;
1.5x + 2y = 441 .... 2
Substitute 1 into 2;
1.5x + 2(x-14) = 441
1.5x+2x-28 = 441
3.5x = 441+28
3.5x = 469
x = 469/3.5
x = 134
Recall that y = x - 14
y = 134-14
y = 120
Hence 134 children and 120 adult plates were served
Answer:
$3.50
Step-by-step explanation:
15 min is 1/4 hr.
Working an add'l 1/4 hr brings the employee additional pay:
($14/hr)(1/4 hr) = $7/2, or $3.50
The area of the kite in the picture is 5m
Answer:
X=6
Step-by-step explanation:
Turning the question into a formulae
2X + 5 > 16; and 2X + 5 < 29
Let’s start by calculating the lower limit
2X + 5 = 16
X = (16–5)/2
X = 11/2 = 5.5
X > 5.5
The lowest value of X is infinitesimally close to 5.5, but greater than 5.5.
Answer:
just follow the rules
Step-by-step explanation:
Cramer's rule applies to the case where the coefficient determinant is nonzero. ... A simple example where all determinants vanish (equal zero) but the system is still incompatible is the 3×3 system x+y+z=1, x+y+z=2, x+y+z=3.
Write the system as a matrix equation. ...
Create the inverse of the coefficient matrix out of the matrix equation. ...
Multiply the inverse of the coefficient matrix in the front on both sides of the equation. ...
Cancel the matrix on the left and multiply the matrices on the right.
