All categories

3 years ago

*the problem is in the pic that is uploaded

Mathematics

1 answer:

Alex787 [66]3 years ago

8 0

Hmm,
ok,
complete square ok
wait wat

he went from
(x-3)²=16 to
x-3=16
?????
he square rooted the left side only
he has to do it to both sides

he should have done
(x-3)²=16
x-3=+/-4
x=3+/-4
x=7 or -1

You might be interested in

Which of the following values has 4 significant figures?

Vlad1618 [11]

Answer:

А. 13.07

Step-by-step explanation:

Significant figures are the number of digit from a number that have meanings. The higher the significant figures of a number, the higher its accuracy will be. The only non-zero number will be count as significant figures unless the zero is between two non-zero numbers like 13.07, the zero placed between 3 and 7. Some number also doesn't count as significant figures like the leading zero.

All other option just shows 3 significant numbers, so the answer is 13.07

6 0

3 years ago

Please look at the included picture, show me your work and please include a good explanation. It would really help me out here.

Jobisdone [24]

These are indeed equivalent, and this identity is one of DeMorgan's laws.

The 6th column is the negation of the 5th column. For example, the first row says

not p or q

is true (T), so the negation would be false (F). The 5th column reads {T, F, T, T}, so the next column should be {F, T, F, F}.

Then in the 7th/last column, you are checking the truth value of the statement

p and not q

For example, in the first row, both p and q are true (T). This means (not q) is false, so (p and not q) is false (F). The last column should end up reading {F, T, F, F}, same as the previous column.

8 0

3 years ago

The plot shown to the right displays the number of books read last month by nine students. What is the median number of books re

Flauer [41]

1 is the median

0000(1)2234

The median is the middle number

4 0

3 years ago

A length of chain is to be constructed by placing 36 component links end to end. The length of a link produced by a production p

Setler79 [48]

Answer:

d. 90 cm, 1.2 cm

Step-by-step explanation:

Given that:

The sample size n = 36

For the length of the link:

The mean $\overline x$ = 2.5

The standard deviation s = 0.2 cm

In a chosen 36 links, The mean and standard deviation for the length chain is as follows:

Mean = n $\overline x$

Mean = 36×2.5

Mean = 90 cm

The Standard deviation = s×√n

The Standard deviation = 0.2×√36

The Standard deviation = 0.2×6

The Standard deviation = 1.2 cm

5 0

3 years ago

Area of a rectangle is (6x25x + 2) sq. units.

nadya68 [22]

<h2>Answer: meters. </h2><h2> </h2><h2>Step-by-step explanation: Let L be the length of the rectangle. We have been given that the rectangle has an area of square meters and a width of meters. Since we know that area of a rectangle is the product of its length and width. To find the length of our given rectangle we will divide the area of the rectangle by the width of our rectangle. Let us factor out our numerator by splitting the middle term. Upon canceling out x-7 from numerator and denominator we will get, Therefore, the length of our rectangle will be metered.</h2>

3 0

3 years ago