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Bas_tet [7]
3 years ago
12

If someone was born in 2018 September 12th how old will they be in 2082?

Mathematics
2 answers:
Margaret [11]3 years ago
7 0

Answer: 64 years old

Step-by-step explanation:You subtract 2082 by 2018 to get the sum of 64

ikadub [295]3 years ago
7 0

Answer:

64/63

Step-by-step explanation:

It depends on what day it is in 2082 however the calculation should be simple...

2082-2018=64

If it is before September 12th in 2082, then they would be 63 because their 64th birthday would be on September 12th!

Hope this helps!

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3. If a ladder is x feet long, how high up a wall can it safely reach?
sineoko [7]

Answer:

xsin∅

Step-by-step explanation:

If the ladder is <em>x foot long</em>, and it can safely make a <em>maximum angle ∅</em>  with the floor, then, the maximum height it can reach will be xsin∅

6 0
3 years ago
The article "Occurrence and Distribution of Ammonium in Iowa Groundwater" (K. Schilling, Water Environment Research, 2002:177–18
Papessa [141]

Answer: 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

Step-by-step explanation:

Since we have given that

Number of alluvial wells = 349

Number of quaternary wells = 143

Number of alluvial wells that had concentrations above 0.1 = 182

Number of quaternary wells that had concentrations above 0.1 = 112

Average of alluvial wells = 0.27

Standard deviation = 0.4

Average of quaternary wells = 1.62

Standard deviation =1.70

So, 95% confidence interval gives

alpha = 5% level of significance.

\dfrac{\alpha}{2}=2.5\%\\\\z_{\frac{\alpha}{2}}=1.96

So, 95% confidence interval becomes,

(1.62-0.27)\pm 1.96\sqrt{\dfrac{0.4^2}{349}+\dfrac{1.7^2}{143}}\\\\=1.35\pm 1.96\times 0.020\\\\=(1.35-0.040,1.35+0.040)\\\\=(1.31,1.39)

Hence, 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

6 0
3 years ago
Solve g(x) = h(x) for x:<br> g(x) = -2x - 2<br> h(x) = -4x – 8
marishachu [46]
Answer: x = -3
set them equal to each other and reverse pemdas as shown in my image

3 0
3 years ago
Factor 2x2 + 7x + 3. <br> (2x + 2)(x + 1) <br> (2x + 3)(x + 1) (2x + 1)(x + 3)
maks197457 [2]
<h3>Answer:</h3>

(2x + 1)(x + 3)

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

It is probably easier to try the answer choices than to try to factor the expression yourself.

(2x + 2)(x + 1) = 2x² +4x +2

(2x + 3)(x + 1) = 2x² +5x +3

(2x + 1)(x + 3) = 2x² +7x +3 . . . . . correct choice

_____

<em>Constructed solution</em>

If you want to factor this yourself, you can look for factors of "ac" that add to give "b". That is, you want factors of 2·3 = 6 that add up to give 7. You don't have to look very far.

... 6 = 1·6 = 2·3 . . . . . . the first factor pair adds to give 7

Now, rewrite the x term using the sum of these numbers.

... 2x² +(1 +6)x +3

... 2x +x +6x +3 . . . . eliminate parentheses

... (2x +x) +(6x +3) . . . . group pairs of terms

... x(2x +1) +3(2x +1) . . . . factor each pair

... (x +3)(2x +1) . . . . . . matches the last selection

6 0
3 years ago
What is the answer to : 29a + 11b - a
shtirl [24]

Answer: wow this is hard so i don't know this

Step-by-step explanation:

3 0
2 years ago
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