Answer:
Step-by-step explanation:
y = 1 - x.....so sub 1 - x in for y back into the other equation and solve for x
5x + 4y = 1
5x + 4(1 - x) = 1
5x + 4 - 4x = 1
x + 4 = 1
x = 1 - 4
x = -3
y = 1 - x
y = 1 - (-3)
y = 1 + 3
y = 4
solution : x = -3 and y = 4 or (-3,4)
Answer:
B) 1.4
Step-by-step explanation:
The sine of an angle is equal to the ratio of the opposite side to the hypotenuse.
sin(B)=opp/hyp
Answer:
2 hours.
Step-by-step explanation:
Money earned for 14 hours of life-guarding = 14*18 = $252. If he worked another 5 hours to make the maximum of 19 he would earn 252 + 5*9
= $297 but he wants to work a minimum of hours for a minimum of 270.
Thus we have the inequality:
252 + 9x ≤ 270
9x ≤ 18
x ≤ 2.
So the number of hours he must do clearing tables = 2.
Answer:
412.
Step-by-step explanation:
412 =
1) less than 500
2) two even digits
3) quadrilaterals have 4 sides
4) 4 + 1 = 5 and there are 5 nickels in a quarter
5) the digital root of 412 is 7
Operating cost
= Gas/Oil + Repair/Maintenance cost
= $1,700+ $650
= $2350
Miles driven
= $2350 ÷ $0.14
= 16,785.71
= 16,786 (round off)
Answer is A
