Hi there!
First we need to remember the following.
Now substitute both of the formulas.
Work out the parenthesis.
And finally collect terms.
~ Hope this helps you!
An equation for the sentence would be g + 7 = 12, where g is the unknown number of gallons.
Answer:
128 ft sq.
Step-by-step explanation:
The way you find the area of a square is by multiplying one side by another, and since it is a square, the sides are the same. This means that if we have a square with a side length of x, the way to find the area of that square is to multiply x by x, which can be written as 
. Now, since we're doubling this, we can say that double Mary's garden is 
. If we substitute 8 in for x, we have to multiply 
by 2 or 8 by 8 by 2 to find our answer. 8 times 8 is 64 and 64 times 2 is 128.
Considering they are congruent
if 7x-19=2x+11
how much is 6x-8
7x-19=2x+11
7x=2x+30
7x-2x=30
5x=30
X=6
6x-8=
(6*X)-8=
(6*6)-8=
36-8=
28
therefore
BC= 28
2x+11
(2*6)+11
12+11
23
23+28+24=75
therefore the perimeter is 75
hope you found this helpful, brainliest if possible please
