Answer:
He was supposed to cross multiply the equation in the original equation. Step 2 was a wrong expression
Explanations:
The given equation is:
Cross multiply the equation, the equation becomes:
x = 8 - 12
x = -4
His mistake was in step 2, he did not properly expand the equation
The proper step was to cross multiply in step 2
Answer:
I'll give you some examples.
Step-by-step explanation:
2+2=x
5+3>3+x
Answer:
7 is the radius
14 is the diameter
44 is the circumference
Step-by-step explanation:
7 is the smallest number of them all so it's the radius. The diameter is double of a radius so 14 is the diameter and finally 44 is the circumference :)
part A:
company a
30m+15
m= matress
company b
28m+21
m=matresses sold
part B:
company a
30(6)+15
195$
company b
28(6)+21
189$
company B charges less
part C:
company a
30(3)+15
105$
company b
28(3)+21
105$
there is no change at all so you do not save anything.
Answer:
The probability of of a randomly chosen student being exactly 21 years old.
= 1.293
Step-by-step explanation:
<u><em>Step(i):-</em></u>
<em>Given Population size n = 500</em>
<em>Mean of the Population = 20 years and 6 months</em>
<em> = </em><em></em>
<em>Standard deviation of the Population = 2 years</em>
Let 'X' be the range of ages of the students on campus follows a normal distribution
Let x =21
<em>The probability of a randomly chosen student being exactly 21 years old.</em>
<em>P( Z≤21) = 0.5 + A( 0.2) </em>
= 0.5 +0.793
= 1.293