Answer:
8x + 20 ≥ 25
Step-by-step explanation:
Well 8 times the sum of a number "x" plus 20,
So we can write the following,
8x + 20
and that should be greater than or equal to 25
8x + 20 ≥ 25
<em>Thus,</em>
<em>as an inequality it is 8x + 20 ≥ 25.</em>
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<em>Hope this helps :)</em>
Answer:
A sample size of 1380 should be obtained.
Step-by-step explanation:
Minimum sample size:
The minimum sample size is of:
In which z is the critical value, related to the confidence level, E is the desired margin of error, 
and 
are the proportions.
99% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
Estimates of 22.6% male and 18.1% female from a previous year
This means that 
.
Within 3 percentage points, minimum sample size:
This is n for which 
. So
Rounding up:
A sample size of 1380 should be obtained.
Answer:
A
Step-by-step explanation:
y = -9 ------(1)
9x -4y = -9 -------(2)
substitute (1) into (2)
9x - 4 (-9) = -9
9x = - 45
x = -5
there you go, x = -5 and y = -9
so. (-5 , -9 )
hope this helps
please mark it brainliest
Answer:
$25.50
Step-by-step explanation:
3 people including Audrey went on the lunch break. If each spent $8.50, the total bill can be calculated in two ways
<u>Method 1 </u>
$8.50 x 3 = $25.50
<u>Method 2 </u>
$8.50 + $8.50 + $8.50 = $25.50
Answer:
30 units²
Step-by-step explanation:
Area of a parallelogram = Base * Height
Substitute in known values
Area = 6 * 5
Area = 30 units²
Hope this helps :)
