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4 years ago

Answer all for Brainliest (easy math) 5 questions for 30 points

1 answer:

7 0

1) The caterpillar was already at 4.5 feet so 4.5 will be added. If it crawls upwards 38 of an inch every minute and the amount of minutes is not specified, this will be represented as 38x. That means the answer is C. f(x) = 38x + 4.5

2) Substitute the known values into the equation. There are 7 people at $8.25 a person, which is a total of $57.75 <u>I used 7 because he invites 6 friends, plus himself. </u>He only has $50 on his gift card, so he won't have enough to cover the cost. The answer is A.

3) They start out with 40lbs and recieve 120 more. They have 160lbs in total. If they sell 8lbs a day for 5 days, thats 8*5 or 40lbs total. 160 - 40 = 120lbs left after 5 days. I'd say the answers are A, B, and D.

4) I think the answer would be C because 1,500 is used to find the number of grams of isotope present after t years. The number of grams can't be 1,500. I hope that makes sense because I'm not sure how to explain it.

5) The growth factor is 2 (2x, x being the number of hours). Multiply by 15 because the lab has 15 of them. The answer is B. f(x) = 15 * 2x

I hope this helps you! I'm sorry if I got any of them wrong!

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A country is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30

kondaur [170]

Answer:

We conclude that speed is greater than 30 miles per hour.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30 miles per hour

Sample mean, $\bar{x}$ = 35 miles per hour

Sample size, n = 15

Alpha, α = 0.01

Sample standard deviation, s = 4.7 miles per hour

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30\text{ miles per hour}\\H_A: \mu > 30\text{ miles per hour}$

We use one-tailed(right) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{35 - 30}{\frac{4.7}{\sqrt{15}} } = 4.120$

Now, $t_{critical} \text{ at 0.01 level of significance, 14 degree of freedom } = 2.624$

Since,

$t_{stat} > t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis and conclude that speed is greater than 30 miles per hour.

We calculate the p-value.

P-value = 0.00052

Since p value is lower than the significance level, we reject the null hypothesis and accept the alternate hypothesis. We conclude that speed is greater than 30 miles per hour.

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3 years ago

Vary the scale factor n from values less than 1 to values greater than 1. How do the points in the resulting images differ from

olya-2409 [2.1K]

Answer: For values of n < 1, all the points on the image move closer to the center of dilation and the logo shrinks. For values of n > 1, all the points on the image move farther from the center of dilation and the logo expands.

Step-by-step explanation: PLATO sample answer. hope it helps :)

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3 years ago

Read 2 more answers

Laura walked 6 1/2 laps of a circular path in 2 hours. At that rate, how many laps of the

NARA [144]

Answer:

3.25 in one hour

Step-by-step explanation:

6.5 ÷ 2 = 3.25

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3 years ago

Just answer number 6 I mean if yk it

balandron [24]

Answer:

49.621

Step-by-step explanation:

If you need to show your work, just multiply 3,817 by 13 which equals 49,621. Then divide 49,621 by 10 three times to get 49.621

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3 years ago

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Ben is 33 times as old as Daniel and is also 44 years older than Daniel. How old is Daniel?

EastWind [94]

Answer:

x = 33·y

x = y + 44

x = 45.375 ∧ y = 1.375

Maybe the following question

Ben is 3 times as old as Daniel and is also 4 years older than Daniel. How old is Daniel?

x = 6 ∧ y = 2

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3 years ago