There are a total of 297 students in the 7th grade. Rough estimates would say that about half of that number are boys and half are girls. Asking only 50 random girls would be biased because not only would it not be all of the girls (the number of girls would be around 148 or 149) but it would also be ignoring the roughly 148 to 149 boys there are on estimate. The sample would be biased because it would be ignoring the opinions of more than half the seventh grade.
If you add the numbers 57 and 59 together you get 116
Answer:
x = 150 miles
Cost = $100
Step-by-step explanation:
Company A = 50 + 20 + 0.20x
= 70 + 0.20x
Company B = 55 + 0.30x
Where,
x =number of miles
find the number of miles for which the companies charge will be the same
Equate the charges of both companies
70 + 0.20x = 55 + 0.30x
70 - 55 = 0.30x - 0.20x
15 = 0.10x
Divide both sides by 0.10
x = 15 / 0.10
= 150
x = 150 miles
The number of miles for which the companies charge will be the same is 150 miles
Substitute 150 miles into any of the companies charges to find the charge
Company B = 55 + 0.30x
= 55 + 0.30(150)
= 55 + 45
= $100
Answer:
The Missing number is 7
Step-by-step explanation:
5+4=9
2+6=8
9+8=17
And if the equations are supposed to have the same answer then you add 7 to 10 and they both have the same answer.
<em><u>Could I please have BRAINLIEST.</u></em>
