Cos^2x-Sin^2x=1-2sin^2x
Answer:
the stone fell in the air for 7 sec and fell in the water for 5 sec
Answer:
Let time taken in air be 'a'
And the time taken in water be 'b'
a+b=12
Distance covered in air = 16a
′′′′′ ′′″″ water= 3b
16a + 3b = 127
Solve the two equations simultaneously
a= 7 secs
b= 5 secs
O -13
O-9
O 3
07
The value of x in the equation -3-(-8)-(-2) = x is 7.
The correct option is 07.
When resolving expressions containing several operations, the procedure to follow is denoted by the acronym PEMDAS. "Parenthesis," "exponents," "multiplication," "division," "addition," and "subtraction" are all represented by the letters P through E.
Given information:
The given equation is described as -3-(-8)-(-2) = x.
To solve the equation as per the PEMDAS rule:
First, we need to simplify the terms within the parentheses: -(-8) is the same as +8, and -(-2) is the same as +2. Therefore, the equation becomes:
-3 + 8 + 2 = x
Next, we can simplify the addition and subtraction from left to right:
-3 + 8 = 5
5 + 2 = 7
Therefore, the value of x is 7.
To learn more about the PEMDAS;
#SPJ7
Answer:
7
Step-by-step explanation:
Equation B: 3y = 3 – 4z
Step 1: –3(y) = –3(15 – 2z) [Equation A is multiplied by –3.]
3y = 3 – 4z [Equation B]
Step 2: –3y = 15 – 2z [Equation A in Step 1 is simplified.]
3y = 3 – 4z [Equation B]
Step 3: 0 = 18 – 6z [Equations in Step 2 are added.]
Step 4: 6z = 18
Step 5: z = 3
In which step did the student first make an error
Answer:
Step 2
Step-by-step explanation:
Where did the -3 from the first equation get simplified to?
Step 1: –3(y) = –3(15 – 2z)
Step 2: 3y = 15 – 2z