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inn [45]
3 years ago
15

I need help with these three problems

Mathematics
1 answer:
sergiy2304 [10]3 years ago
8 0
41. The vendor sells both types of apples, meaning that he can sell his 30 lbs of apples in two ways. Therefore, we add the two sizes of apple bunches, and that leaves us with 5f + 2.5t = 30, and thus the answer is B.

42. There's an easy way to solve this. In a quadratic function of the form ax² + bx + c, the 2 (real) roots must always multiply to c, and add to b. The roots of our function are -1 and 6. -1 * 6 = -6, and -1 + 6 = 5. So, we are looking for something that is x² + 5x - 6, which would be A.

43. Since you took the boxes "out" of the bookcase, you would subtract 18. This leaves us with choice A and C. Because the bookcase can hold "no more than" t books, t must less than or equal to 8b. So, we are looking for something that is equivalent to t ≤ 8b - 18, which is A.
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1.15 GPA and study hours: A survey was conducted on 193 Duke University undergraduates who took an introductory statistics cours
KonstantinChe [14]

Answer:

Step-by-step explanation:

A

According to the exercise we can say that the explanatory variable will be hours / weeks of study.

The response variable is GPA.

B

We definitely found that between the variables there is a weak or fragile relationship, neither negative nor positive nor linear.

C)

1.Observational study, since we observe that the only variables that will influence the results of the study are the observations of the students

2.No. This study is observational and its characteristics are not sufficient to conclude that studying more hours leads to obtaining a higher GPA.

8 0
3 years ago
A painter bought 14 gallons of paint just enough to cover 2 room
OverLord2011 [107]
<h3>Answer:</h3>

7

<h3>Step-by-step explanation:</h3>

Based\ on\ the\ given\ conditions,\ formulate:

14\div 2

\frac{14}{2}

Creoss out the common factor

7

<em>I hope this helps you</em>

<em>:)</em>

6 0
2 years ago
You earn $28 for washing 7 cars. How much do you earn for washing 6 cars?
iren [92.7K]

━━━━━━━━━━━━━━━ ♡ ━━━━━━━━━━━━━━━  

Since you can earn 28 dollars by washing 7 cars, and you want to find the amount money you can make by washing 6 cars.

\frac{28}{7} = \frac{x}{6}

First, you should find the amount of money you can make by washing 1 car (unit rate).

\frac{28}{7} = \frac{x}{1}

To get from 7 to 1, you have to divide 7 by 7; 7 ÷ 7 = 1.

Do the same thing to the numerator; 28 ÷ 7 = 4.

Now you know how much you make by washing 1 car, you need to find how much you make by washing 6 cars.

\frac{4}{1} = \frac{x}{6}

To get from 1 to 6, you multiply by 6. 1 times 6 equals 6.

Now do the same thing to the numerator; 4 × 6 = 24.

You can earn 24 dollars by washing 6 cars.

━━━━━━━━━━━━━━━ ♡ ━━━━━━━━━━━━━━━  

5 0
3 years ago
HELP PLEASE, ILL GIVE YOU BRAINLIEST
Vinil7 [7]

180-55-70=55

180-55-75=50

180-50-95=35

Ans:35

7 0
3 years ago
Please help asap please
vodka [1.7K]
Ok, so lets evaluate this here:
2/3 (x - 6) - y       Let's do the first part: 2/3 (x - 6)
                           If X = 9 then we subtract 6 from 9 and get 3. Then we multiply 
                           3 by 2/3 and get 2.
Then lets do the 2nd part: 2 - y.
So if y = 5/6, we can first convert 2 into an improper fraction in sixths and have 12/6. Then. we just have to do 12/6 - 5/6 and subtract the numerators and end up with 7/6. The final answer is A, hope this helps!
7 0
3 years ago
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