Answer:
z = 0.9778x^2 / y.
Step-by-step explanation:
When z varies with the square of x the equation is z = kx^2 where k = a constant.
If it also varies inversely with y the equation is z = kx^2/y.
When z = 4.4 , x = 3 and y = 2 we have:-
4.4 = k * 3^2 / 2
Multiplying by 2:
8.8 = 9k
k = 8.8 / 9
= 0.9778.
So the required formula is z = 0.9778x^2 / y.
1. It is a quadratic equation.
Explanation:
A quadratic equation is any equation that can be rearranged in standard form (ax^2 + bx + c). That equation can be rewritten as -x^2 + 1, where a is -1, b is 0, and c is 1.
2. 4x^2, 3x, and 5.
Explanation:
A quadratic term is ax^2 in the formula ax^2 + bx + c. A linear term is bx in the formula, and a constant is c in the formula.
Answer:
-4.88
Step-by-step explanation:
-5+(-3) = (-8)
7/10 = 98/140
3/7 = 60/140
15/4 = 525/140
525/140 + 60/140 + 98/140 = 683/140
683/140 = 4 123/140
4 123/140 = 4.88 (2dp)
4.88+(-8) = -4.88
Answer:
340
Step-by-step explanation:
240 + 100 = 340
