Answer:
Step-by-step explanation:
5/3=1/n(do cross multiplication)
3*1=5*n
3=5n
3/5=n
As stated in the question
Bethany - x
Amanda - y
the relationships are
Lauren is 13 years older than Bethany
Laurens age = x + 13
David is 11 years older than Amanda
Davids age = y + 11
product of Bethany's and Laurens ages equal to twice Amandas age
x * (x+13) = 2y
x² + 13x = 2y
divide all by 2
x²/2 + 13/2x = y
if they subtract 20 from Bethany and Laurens, then product is equal to Davids age
(x-20)(x+13-20) = y +11
(x-20)(x-7) = y+11
x² -7x -20x+140 = y+11
x² -27x +129 = y
the 2 equations to determine the relationships are
y = x²/2 + 13/2x
y = x² -27x +129
the first option is correct
Answer:
y = 15.9
Step-by-step explanation:
y = 3 - 4.3x
y = 3 - 4.3(-3)
y = 3 + 12.9
y = 15.9
Answer:
(-4,-4)
YW :))
Or you could of just looked it up cause thats what I did!!
Answer:
The answer to your question is - 8
Step-by-step explanation:
Data
(3 - 4) 2 * 5 + (4 - 1) 2/3
The order of operations is
1st Parenthesis
2nd Roots and exponents
3rd Multiplication and division
4rd Addition and subtraction
Following these rules
Parenthesis (-1) 2* 5 + (3) 2/3
Multiplication and division - 10 + (6/3)
- 10 + 2
Addition and subtraction - 8