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ivolga24 [154]
3 years ago
9

No files no links or you’re going to get reported I’m giving 10 points so all I need is someone to help me

Mathematics
1 answer:
elena55 [62]3 years ago
3 0
1) 9x + 13 = 17x - 15
13 = 8x -15
28 = 8x
x = 3 1/2
Answer- A

2) barrel a; 5x+20
barrel b; 4.25x+32
Equal barrel weight: 5x+20=4.25x+32
5x=4.25x+12
0.25x=12
x=48
Answer: 48 shovels of dirt will make the two wheel barrels equal
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Identify the domain of the function shown in the graph.
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Answer:

[2, 6].

Step-by-step explanation:

Notice that there is a red line (graph) only for [2, 6].  Thus, the domain of this function is [2, 6].

6 0
3 years ago
Jane is studying the rate at which the sale of a particular brand of chocolate has increased over the years. The graph below sho
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The y-intercept, in this case, represents when x is at 0, or when she just began observing.
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4 years ago
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Ali bought 2.15 pounds ogf turkey at 7.89 per pound and 1.87 poundb lamb at 7.89 per pound Which expression does NOT show the to
eduard

Answer:

Total = $31.71

Step-by-step explanation:

Given data:

pounds of turkey = 2.15 at a rate of 7.89/ pound

pounds of lamb = 1.87 at a rate of 7.89/ pound

cost of each item as

cost(T) = 2.15 × 7.89

cost(T) = $16.96

And for lamb

cost(L) = 1.87 × 7.89

cost (L) = $14.75

Total cost will be the summation of both cost

Total = 16.96 + 14.75

Total = $31.71

6 0
3 years ago
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Kevin has $24 to buy a gift for his cousin he found a gift for $22 with 5% sales tax added on will Kevin have enough money to bu
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Answer:

5% of $22 is $1.10.

22+1.10=23.10

23.10 is less than 24

Step-by-step explanation:

8 0
3 years ago
In a sample of 400 voters, 360 indicated they favor the incumbent governor. The 95% confidence interval of voters not favoring t
Andru [333]

Answer:

0.071 to 0.129

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

In a sample of 400 voters, 360 indicated they favor the incumbent governor. This means that 400-360 = 40 do not favor the incumbent governor. So n = 400, \pi = \frac{40}{400} = 0.1

95% confidence interval

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.10 - 1.96\sqrt{\frac{0.10*0.90}{400}} = 0.071

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.10 + 1.96\sqrt{\frac{0.10*0.90}{400}}= 0.129

The correct answer is:

0.071 to 0.129

7 0
3 years ago
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