Answer:
I need helpppppppppppppppppppppppplz
First solve for one variable
solve for a in second eqatn
minus 3x both sides
a=17-3x
sub 17-3x for a in first equaiton
2(17-3x)+2x=18
34-6x+2x=18
34-4x=18
minus 34 both sides
-4x=-16
divide both sides by -4
x=4
sub back
a=17-3x
a=17-3(4)
a=17-12
a=5
a is 5
x=4
WORK SECTION (without thoughts)
2a+2x=18 to a+x=9
a+3x=17
a=17-3x
(17-3x)+x=9
17-2x=9
-2x=-8
x=4
a=17-3(4)
a=17-12
a=5
x=4
a=5
Answer:
B. [144, 174]
Step-by-step explanation:
Given
Total Weight Range = Not less than 145lb and Not more than 175lb
Required
Determine the actual weight range
Let x represent the total possible weight of a bodybuilder
From the question, we understand that the total weight is within the range of 145 to 175. i.e.
Also from the question, we understand that the bodybuilder's cloth adds 1 lb to the total weight;
The next step is to subtract this 1 lb from the range of total weight to get the actual weight range
This is as follows
This gives
<em>From the list of given options, the correct answer is [144,174]</em>
Answer:
Him waiting for a few months
Step-by-step explanation:
Him waiting is sensible because it is a wise choice
Answer:
416
Step-by-step explanation:
Standard deviation is 2.6
Margin error for the problem is 0.25
Probability 95%, that means thet the siginficance level α is 1 – p
α = 1 – 0.95 = 0.05
margin of error (ME) can be defined as follows
ME = Z(α/2) * standard deviation/ √n
Where n is the sample size
Z(0.05/2) = Z(0.025)
Using a z table Z = 1.96
Now, replacing in the equation and find n
.25 = 1.96 * 2.6/ √n
0.25 = 5.096/√n
√n = 5.096 /0.25
√n = 20.38
n = 20.38^2
n = 415.5 = 416