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Olin [163]
3 years ago
12

Harry solved a quadratic equation. His work is shown below. In which step did Harry make an error? (x-5)^2+6=42

Mathematics
2 answers:
juin [17]3 years ago
5 0

Answer:

X = 11, - 1

Step-by-step explanation:

Given (x-5)^2 +6 = 42

Subtract 6 from sides

(x-5)^2 = 36

take the square root of both sides

X - 5 = +/- 6

X = 11, - 1.

Harry did not solve for X.

julia-pushkina [17]3 years ago
5 0

Answer:

the correct answer is step two. I hope it help

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G = {(5, 3), (2, 3), (6, 4)} Is G-1 a function and why?
galben [10]
To get G^-1 all we need to do is flip the points around Example for (5,3) make it (3,5)
Here are the points in inverse (3,5); (3,2); (4,6)
To tell if a group of point can be a function we need to 1st look at the x values.  If all the x values are different, then it is a function (the x's are not all different)
If there are x values that are the same, they MUST have the same y value.
look at the points (3,5) and (3,2) those have the same x but they go to different y values so it is not a function.

You can think about it like this.  Can you go to more than 1 place at the EXACT same time?  Obvious answer is no. Can you have multiple people go to the same room?  Sure that is possible.  Same with functions.  An x value can ONLY go to 1 y value, and many different x values can go to the same y value.
4 0
3 years ago
casey has a small business making dessert baskets. she estimates that her fixed weekly costs for rent, electricity, and salaries
m_a_m_a [10]
500 = 200 + 2.50x
x = amount of dessert baskets

500 - 200 = 300.
300 = 2.50x
300 ÷ 2.50 = 120.
Casey made 120 dessert baskets.
3 0
3 years ago
Fraction is equivalent to a terminating decimal
11111nata11111 [884]
The best way to compare fractions would be to make them have like denominators.  We first , in this case, need to convert from decimal to fraction. 

                 Converting decimals to fractions first requires an understanding of the decimal places that fall after the decimal.  One place after the decimal is the tenths place.  If you have a decimal that ends at one place after the decimal (or in the tenths place) it can be written as the number after the decimal in the top of the fraction and ten (tenths place) in the denominator.  ex.   .5 ends one place after the decimal and can be written as 5/10...(read as five tenths).

If a decimal ends at two places after the decimal...(ex.   .75)...it ends in the hundredths place, can be written as that number in the numerator and 100 in the denominator....(ex  75/100) and is read as seventy-five hundredths. 

one place after the decimal is tenths (over 10), two places is hundredths (over 100), three places is thousandths (over 1000) , four places ten-thousandths (over 10000) and so on.

Because each decimal in your problem has a different amount of decimal places, it makes for different denominators. But, We can add a zero to the end of a decimal without changing it's value; if we add a zero to the end of .5 and make it .50 , we then can write it as 50/100 and would now have like denominators.

if .5 = .50 = 50/100 and .75 = 75/100

we now have the question what fractions can fall between 50/100 and 75/100. 

That would be fractions such as 51/100, 52/100, 53/100.......74/100.


6 0
4 years ago
I need help! I would appreciate if you show me the work! Thank you !
iVinArrow [24]

Answer:

-11 for the first one and 0 for the second one

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
HELPPPPPPPP I am taking it now
Elena-2011 [213]

Answer:

I'm pretty sure the answer is -a²b and 5a²b

Step-by-step explanation:

8 0
4 years ago
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