Sarah is 14
The twins are 12
The youngest (n) is 7
14+(12+12)+7=45
n=7
Answer:
a=5, b=-2
Step-by-step explanation:
If you simplify the equation, you get:
3ax +6 -4x -4b - 11x - 14 = 0 =>
3ax - 15x -4b -8 = 0
group together x's and constants:
(3a-15)x -8 -4b = 0
To make this 0 for all x, we have to find an a such that 3a-15 = 0 and b such that -8-4b = 0. this leads to a=5, b=-2
Answer:
243 in^3
Step-by-step explanation:
Cut into 2 rectangles
First one would be ..
12 x 8 = 96
second one would be
7 x 21 = 147
Add them together
147 + 96 = 243
D=228
when 2 numbers or variables are next to eachother it means you need to multiply. So in this case r=57 and t=4 and we mulitply. 57 x 4 = 228. So the answer is 228. Hope this helps and have a great day!
