Answer:
-3,-5,-4,-1,1-1,1-1,,3,3-,-3,-4,5-,-8,9--,5,3
Step-by-step explanation:
Answer: $107
Step-by-step explanation:
Tip = 20 % of $90
= 20/100 × $90
=$18
Sales tax at 10% = 10/100 × $90
= $9
Total cost= $90 + $18 + $9
= $107
Step-by-step explanation:
(3 + 4) 9 + 3 = (7)9 +3
= 63 + 3
= 66
Answer: 10 inches.
Step-by-step explanation:
We have to solve a system of equations.
The formula to calculate a triangle area is A = (b.h)/2
where b is the base and h is the height. This will be our first equation.
Since the height is 4 inches greater than the base, the second equation will be: h = b+4
We replace h and the value of the area (70 square inches) in the first equation, and we solve it by using the cuadratic equation formula:
70 = (b . (b+4)) / 2
70 . 2 = b² + 4b
140 = b² +4b
0 = b² + 4b - 140
The roots of this polynomial are -14 and 10. Since a distance can't be negative, the length of the base is 10 inches.
