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3 years ago

~PLEASE HELP ASAP OFFERING 10 POINTS~

Mathematics

2 answers:

Mrac [35]3 years ago

8 0

So this is going to be a linear equation, you can tell by seeing the growth being the same between days 15 and 20 & 33 and 38. We will be using the $y=mx+b$ format, where m = slope and b = y-intercept.

The equation to solve for the slope is $\frac{y_2-y_1}{x_2-x_1}$ . You can use any two ordered pairs on this list. I'll be using 15 and 20.

$\frac{1040-815}{20-15}= \frac{225}{5} =45$

45 is the slope.

To solve for the y-intercept, plug in 45 in the m variable and any ordered pair into the x and y variable spot. For this, I'll be using (15, 815)

$815=45(15)+b \\ 815=675+b \\ 140=b$

Now putting the equation together ( $y=45x+140$ ) we can plug in 26 into the x variable and solve.

$y=45(26)+140 \\ y=1170+140 \\ y=1310$

In short, the answer is B. 1,310 feet.

Minchanka [31]3 years ago

5 0

Answer:

Step-by-step explanation:

I took the test and got 100

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The sample space for a roll of two number cubes is shown in the table.

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I think its C but I'm not 100% sure

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3 years ago

Read 2 more answers

15 feet of edging costs $24.98. How much will 28 yards cost?

GuDViN [60]

Answer:

139.888 $

Step-by-step explanation:

Data :

15 ft = 24.98$

1 yard = 3 ft

15ft / 3 ft = 5 yard

5 yard = 24.98$

28 yd / 5yd = 5.6

5.6 × 24.98 = 139.888

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2 years ago

There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is appro

elena55 [62]

Answer:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

Two exams. The exam that you did score better is the one in which you had a higher zscore.

The composite score on Exam A is approximately normally distributed with mean 20.1 and standard deviation 5.1.

This means that $\mu = 20.1, \sigma = 5.1$ .

You scored 24 on Exam A. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{24 - 20.1}{5.1}$

$Z = 0.76$

The composite score on Exam B is approximately normally distributed with mean 1031 and standard deviation 215.

This means that $\mu = 1031, \sigma = 215$ .

You scored 1167 on Exam B, s:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{1167 - 1031}{215}$

$Z = 0.632$

You had a better Z-score on exam A, so you did better on that exam.

The correct answer is:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

3 0

3 years ago

Need some help with this photo it would be much appreciated :)

masya89 [10]

Answer:

12.6

Step-by-step explanation:

c=2 x 3.14 x r

2 x 3.14= 6.28

6.28 x 2= 12.56

4 0

3 years ago

Which of the following is the equation of

Neporo4naja [7]

Answer:

a) Option A is correct.

b) Option C is correct.

Step-by-step explanation:

a) Which of the following is the equation of the line passing through the points (1, 1) and (-3,5)?

We will use the equation

(y-y₁)=m(x-x₁)

m= (y₂-y₁)/(x₂-x₁)

m= (5-1)/(-3-1)

m= 4/-4

m= -1

Consider point (1,1) and Putting value of m

(y-y₁)=m(x-x₁)

(y-1)=1(x-1)

y-1=x-1

y=x-1+1

y=x

So, Option A is correct.

b) Which of the following is the equation of a line with a slope of 0 passing through (2,5)?

The formula used is:

y= mx+b

Finding b:

5=0(2)+b

=> b = 5

So, equation is:

y = mx+b

y=0x+5

y=5

So, Option C is correct.

5 0

3 years ago