Given equation is 3(-a-3)-2(3a+3)=-78
we can start by distributing numbers which are outside parenthesis
3(-a-3)-2(3a+3)=-78
-3a-9-6a-6=-78
combine like terms
-9a-15=-78
-9a=-78+15
-9a=-63
a=-63/-9
a=7
Hence final answer is a=7.
Answer:
Step-by-step explanation:
if he runs 9 miles a day for 30 days thats 9x30 its pretty simple math all you have to do is multiply it should be 270 miles in total. np abt the spammage
Stem-and-Leaf-plot represents data by separating each value into two parts. Dot plot uses a graph in which each data value is plotted as a point along a horizontal scale of values. The difference is Dot Plots use graphs to organize data and Stem-and-Leaf plot separates the data into two parts
Answer:
(X,Y)(18,12)
Step-by-step explanation:
x + y = 30
2x + 4y = 84
___________
2x+2y=60
2x+4y=84
_________
-2y=-24/-2y
y=12
2x+4(12)=84
2x+48=84
2x=84-48
2x/2=36/2
X=18
Answer:
the answer is B
Step-by-step explanation:
your welcome
