Answer: 20.57142857
Step-by-step explanation:
148 = 3x + 3 + 4x + 1
Step one: combine like terms
148 = 7x + 4
Step 2: Subtract the 4 over to 148
144 = 7x
Step 3: Divide 7 on both sides
20.57142857 = x
Answer:
96
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
(a)
y = 
- bx
substitute y = 6 , x = 1 into the equation
6 = a - b → (1)
substitute y = 0 , x = 2 into the equation
0 = 
- 2b ( multiply through by 2 to clear the fraction )
0 = a - 4b → (2)
multiply (1) by - 4
- 24 = - 4a + 4b → (3)
add (2) and (3) term by term to eliminate b
- 24 = - 3a + 0
- 24 = - 3a ( divide both sides by - 3 )
8 = a
substitute a = 8 into (1) and solve for b
6 = 8 - b ( subtract 8 from both sides )
- 2 = - b ( multiply both sides by - 1 )
2 = b
Then a = 8 and b = 2
(b)
when x = 4
y = 
- 2(2) = 2 - 4 = - 2
When a whole number is multiplied by 1,000 the product is the whole number with 3 zeros added behind it.
I'd say there are two significant figures in the number 520, and those are 5 and 2, because trailing zero in a number without decimals is rarely considered to be significant.
Now, the difference between a systematic error and a random error is that a systematic error occurs over and over again, whereas a random error is random and may never be repeated.
