Take the sqrt of both sides of <span>(x+2)^2=10:
x+2 = plus or minus sqrt(10)
Solve for x: x = -2 plus or minus sqrt(10)
Evaluate x: x = -2 + sqrt(10) AND x = -2 - sqrt(10) (answers)
</span>
Answer: 6.25 miles
Step-by-step explanation:
Convert the 15 minutes to 1/4 hr or .25
now multiply 25*.25=6.25 miles
Answer:
18 pencils
Step-by-step explanation:
1/2 dozen:6
1 dozen:12
6+12=18
18 pencils
Given:

He does mistake in the order of giving preference.
We should give preference in the order, division, multiplication, addition, subtraction.
But, he gave the first preferrence to the subtraction.
72-8=64
Next, he used division
64/2=32
Next he adds 32 with 8.
So, he gets 50.
But the actual simplification is,
Simplifying we get,

Hence, the correct value of the expression is 86.