4d=56
d=14. Ad a result, Dorothy is 14 years old. Hope it help!
Answer:
25 pieces
Step-by-step explanation:
12.5 * 16= 200 ounces
therefore 200/8=25
Answer:
X=3
Y=1
Step-by-step explanation:
In solving simultaneous equations, there are three methods, we have the elimination method, substitution method or graphical method. But for the purpose of this question, we would be using Elimination method.
5y-4x =-7 Equation 1
2y+4x=14 Equation 2
Since x has the same coefficient, it's easy to eliminate by adding up the two equations
5y+2y=7y
-4x+(+4x)=0
-7+(+14)=7
We have 7y=7
Divide both sides by 7,
y=7/7
y=1
Substituting for y in equation 2.
2(1)+4x=14
2+4x=14
4x=14-2
4x=12
x=12/4
x= 3
Answer:
= 10
Step-by-step explanation:
Multiplication first:
(-3 + 8 x 2 - 3) =
(-3 + 16 - 3)
Simplify the rest:
(-3 + 16 - 3)
= (13 - 3)
= 10
