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timurjin [86]
3 years ago
8

Can someone please help me?

Mathematics
2 answers:
astraxan [27]3 years ago
8 0

Answer:

a. she has 5 yards left

b. she can make 2 more placemats

VikaD [51]3 years ago
5 0

Answer:

a) Lindsey has 5 yards of fabric left

b) Lindsey can make one more pillow and one more placemat, and have 0 fabric left

Step-by-step explanation:

Linday starts with 27 yards of fabric, but has to get rid of some for each item made. If she makes 2 of everything, it would be 6 + 6 + 3 + 3 + 2 + 2 yards of fabric used, or 22 yards. That means that to find the remaining fabric left, the equation is 27 - 22 = 5 so Lindsay will have 5 yards left

If lindsay wanted to, she could make a pillow and a placemat, which is 3 + 2, or 5. That means Lindsay will have used all her fabric

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A study was conducted in order to estimate ?, the mean number of weekly hours that U.S. adults use computers at home. Suppose a
Stels [109]

Answer:

d. the current study does not provide significant evidence that the mean number of weekly hours has changed over the past year, since 8 falls inside the confidence interval.

Step-by-step explanation:

Mean was of 8 hours, test if it has changed:

At the null hypothesis, we test if it has not changed, that is, the mean is still of 8, so:

H_0: \mu = 8

At the alternative hypothesis, we test if it has changed, that is, the mean is different of 8, so:

H_1: \mu \neq 8

Using a 95% confidence interval of (7.7, 9.3), our conclusion is that:

8 is part of the confidence interval, which means that the study does not provide evidence that the mean has changed, and the correct answer is given by option d.

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3 years ago
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Sauron [17]

Answer:

A

Step-by-step explanation:

d(t)=3t+1 but d(t)=7

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d(t)=3(2)+1

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5 0
3 years ago
Question 7<br>Which shape is a rectangle?<br>​
anzhelika [568]

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Find the exact length of the third side.<br> 51
Nesterboy [21]

Answer:

24

Step-by-step explanation:

You can use the Pythagorean Theorem to solve this:

a^{2} + b^{2} = c^{2}

The legs of the triangle are put into either a or b and the hypotenuse is put into c. In this case, they've already given you the hypotenuse, but now you need to find the leg:

45^{2} + b^{2} = 51^{2}

2025 + b^{2} = 2601

<em><u>Subtract 2025 from both sides:</u></em>

2025 + b^{2} = 2601

-2025       -2025

_____________

b^{2} = 576

<em><u>Square root:</u></em>

\sqrt{b^{2} } = \sqrt{576}

b = 24

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4 years ago
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tankabanditka [31]

Answer:

7, 13     3,7    17,3    13,2

Step-by-step explanation:

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3 years ago
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