3 years ago:
m - 3 = 3(b - 3)
m - 3 = 3b - 9
m + 6 = 3b
m/3 + 2 = b
5 years from now:
m + 5 = 2(b + 5)
m + 5 = 2b + 10
m - 5 = 2b
m/2 - 5/2 = b
combine:
m/3 + 2 = m/2 - 5/2
1. multiply by 6
2m + 12 = 3m - 15
2. add 15 - 2m to both sides
27 = m
Marry is 27 years old.
Answer:
y = 75
Step-by-step explanation:
The sum of the angles in a quadrilateral = 360°
∠DGF and 80° form a straight angle and are supplementary, hence
∠DGF = 180° - 80° = 100°
Subtract the sum of the 3 angles from 360 for the value of y
y = 360 - (65 + 120 + 100) = 360 - 285 = 75
Answer:
The side lengths are 10 by 7
Step-by-step explanation:
The area of a rectangle is
A = l*w
70 = (x - 11)(x - 8)
FOIL
70 = x^2 -8x-11x+88
Combine like terms
70 = x^2 -19x +88
Subtract 70 from each side
0 = x^2 -19x +88-70
0 = x^2 -19x+18
Factor
What number multiplies to 18 and adds to -19
-18*-1 =18
-18-1 = -19
0=(x-18)(x-1)
Using the zero product property
x-18=0 x-1=0
x=18 x=1
But x cannot x=1 because then the side lengths would be negative
x-18 = 10
x-11 = 7
The side lengths are 10 by 7
Answer:
You are correct
It is C divided by PI
Step-by-step explanation:
c=pi x D
Using substitution method replace letters with numbers
12(c)=3(pi) x 4(d)
we want 4(d) the subject of the formula
4(d)=
12/3 =4
so it is 4(d)=12(c)/3(pi)
so D=C/PI
Answer:
If Nardia is N and Pierre is P an equation that would represent this problem is 52-3n=p
