Answer:
4/ 5 x 2^x
Step-by-step explanation:
2^x +4-2^x / 5^2
First we multiply everything by 5^2/5^2
2^x + 4-2^x (5^2x) / (5^2)(5^2)
= 2^x + 4-2^x 5^2x we see 2 x 5^2
= 2^x+4-2 x 5^2x +5^2x / (5^2)(5^2x) 2^x cancels with 2^x as subtraction and 5^2x base cancels with top also
= 4/ 5 x 2^x
The percentage error is 23%
Explanation:
The estimated total cost of the groceries = $50
The actual cost of the groceries = $65
To find the error value, we need to subtract the value of actual cost and total cost of the groceries.
Thus,
error value = actual cost - total cost
error value 
Hence, error value = $15
The formula to determine the percent error is given by

Substituting the values in the formula, we get,

Rounding off the value, we have, 23%
Thus, the percentage error is 23%
13.5 x 2.4 = 32.4
The length of the road they built is 32.4 km
Answer:
Step-by-step explanation:
Step 1: Subtract 10 from both sides.
2x2+20x−10=10−10
2x2+20x−10=0
For this equation: a=2, b=20, c=-10
2x2+20x+−10=0
Step 2: Use quadratic formula with a=2, b=20, c=-10.
x=
−b±√b2−4ac
2a
x=
−(20)±√(20)2−4(2)(−10)
2(2)
x=
−(20)±√(20)2−4(2)(−10)
2(2)
x=
−20±√480
4
x=−5+√30 or x=−5−√30
Answer:
x=−5+√30 or x=−5−√30
Answer:
b)252 is the answer
Step-by-step explanation:
x\42=6
x=6*42
x=252