For this, we use the FOIL method of expanding brackets; start by multiplying the FIRST terms of each bracket together to get xx=x^2. Next multiply the OUTSIDE elements, ie the first element in the first bracket and the last in the second, giving x(-5)=-5x. Then comes the INSIDE elements, giving 4x=4x, and finaly the LAST elements of each bracket, giving 4(-5)=-20. Adding all these terms together gives us our answer; x^2+4x-5x-20, which can be simplified to x^2-x-20.
Hope this helps!
------------------------------------
Define x :
------------------------------------
Let the width be x.
Width = x
Length = 4x
------------------------------------
Find x :
------------------------------------
Perimeter = 30 ft
2 (x + 4x) = 30
2(5x) = 30
10x = 30
x = 30 ÷ 10
x = 3
------------------------------------
Find Length and Width :
------------------------------------
Width = x = 3
Length = 4x = 4(3) = 12
------------------------------------
Find Area :
------------------------------------
Area = 3 x 12 = 36 ft²
------------------------------------
Answer : Area = 36 ft²
------------------------------------
The deepest point of the lake is -922, so to get to the surface of the lake you would need to add 922 feet.
The deepest point of the lake is 11,542 feet above sea level.
To find the surface of the lake add 922 to 11,542.
11542 + 922 = 12,464 feet
Answer
The answer is 8040
Step-by-step explanation:
It might be wrong, but here take it this way with Pemdas.
P= Parenthesis (30*2) and what's in there is multiplication correct? So, 30 times 2 is 60. Then, E is exponents. There's none there. So we skip to multiplication. 16 times 12 is what? 192. Next is division. So 192 divided by 2. That's 96. So, Then it'd be 38+96(60.) 38+96= 134. 134(60) That being said. That would equal = 8040 using Multiplication, 194 using addition. 74 using subtraction. And 2.2_ using division.
