5x+20=10 solve for x

First move the 9 to the right side by subtracting 9 from both sides.

So we have x² + 6x ___ = 7 ___.

Notice that I created a space on each side of the equation.

The space is what we need to complete the square.

The number that goes in the spaces comes from half the coefficient of the

middle term squared, which in this case is half of 6, or 3, squared, which is 9.

So we add 9 to both sides of the equation.

Once we have completed the square, out trinomial will always factor as a binomial squared, and the number that goes inside the binomial will always be half the coefficient of the middle term of the trinomial.

So we have (x + 3)² = 16.

Now square root both sides to get x + 3 = ± 4

So x + 3 = 4 or x + 3 = -4.

Solving each equation from here, we get x = 1 or x = -7.

So our solution set is {1, -7}.

Answer:

51 degrees

Step-by-step explanation:

gave up on delta math

Answer:

1) 2(8) +32 = 48  2) 5-3x   3) 9x+15

Step-by-step explanation:

For the first equation, you do PEMDAS which is parenthesis, exponents, multiplication/division, addition/subtraction. So, you multiply first. For the second problem, you subtract 5 because you see that in the equation, and product of 3 and a number which would be x since it is unknown. For the last equation, you would use the distributive property to do 3(3x) and 3(5) to get 9x+15.

Answer:

Just divide 23 by 92 using long division to get a decimal answer, then convert the decimal to a percent by moving the decimal over to the right by 2 places and adding a percent sign.

Step-by-step explanation:

23/92 = x/100

92x = 2300

x = 25

Answer:

i dont c-a-r-e

Step-by-step explanation:

Answer:1.)-21.        2.)33.          3.)12.        4.)6.         5.)24

Step-by-step explanation:

Answer:

1,530

Step-by-step explanation:

sry if im wrong

Answer:

1106

Step-by-step explanation:

9514 1404 393

Answer:

  (b)  60°

Step-by-step explanation:

The sum of angles in a pentagon is 540°, so you have ...

  90° +90° +150° +x +150° = 540°

  x = 540° -480°

  x = 60°

Answer:

Number of blades of grass on a football field.

Number of Pages in the novel.

Number of members in your immediate family.

Number of musicians.

Step-by-step explanation:

¯\_(ツ)_/¯

Answer: (largest to smallest) Number of blades of grass on a football field, Number of pages in the novel "MobyDick", Number of musicians in a school marching band, Number of members in your immediate family

Step-by-step explanation:

Answer:

1/8 or 8/64

Step-by-step explanation:

its 1/8 you just times them both by 8 it ez

Answer:

(x,y) = (25,15)

Step-by-step explanation:

In a parallelogram, alternate angles are equal, so

[tex]\left \{ {{3x-8=4y+7} \atop {4x+13=5x-12}} \right.[/tex]

From the latter equation we obtain [tex]x= 13 + 12 = 25[/tex]. So substituting in the former equation gives

[tex]75-8 = 4y + 7\\4y = 60\\y = 15[/tex]

Answer:

18 ft

Step-by-step explanation:

5 years for every 3 feet

30 years

Knowing this information, we can multiply or create an equation:

Multiplication:

5 x 6 = 30 so...

3 x 6 = 18

Equation:

5/3 = 30/x

5x = 90

/5    /5

x = 18

Answer:

[tex]605[/tex]

Step-by-step explanation:

         [tex]605[/tex]

[tex]47[/tex]√[tex]28435[/tex]

   [tex]-282[/tex]↓

         [tex]23[/tex]

        [tex]-0[/tex]↓

         [tex]235[/tex]

       [tex]-235[/tex]

             [tex]0[/tex]

Hope this helps!

plz mark me brainliest. :)

Answer:

[tex]M∠LOM = \boxed{48}[/tex]

Step-by-step explanation:

[tex]M∠LOM + m∠MON = 180 \\ 7x-92 + 6x+12 = 180 \\ 13x - 80 = 180 \\ 13x = 180 + 80 \\ 13x = 260 \\ \boxed{ x = 20} \\ (7x - 92 )= 140 - 92 = \boxed{48} \\ [/tex]

Answer:

C

Step-by-step explanation:

Because I'm smart.

Answer:

C) 9 heads and 9 tails

Step-by-step explanation:

if a fair sided coin is tossed, the probability of obtaining either heads or tails is 50%

If the coin is tossed 18 times, we would expect to see the same probability outcome which is 50% heads and 50% tails.

which corresponds to 9 heads and 9 tails.

Answer:

Step-by-step explanation:

Each throw is independent of any other throw. The probability of getting a head or tail is 1/2, so you should expect to flip as many heads as tails. Answer C shows that even split.

Answer:

-2

Step-by-step explanation:

Rearrange for w

-12/6 = -2

Have a great day :)

-2

Step-by-step explanation:

6w = -12

w = -12/6

w = -2

hope u will happy forever

Answer:

I would have to guess c because it show a decrease in the number line

Step-by-step explanation:

Step-by-step explanation:

ɪᴛs ᴛʜᴇ ʟᴀsᴛ ᴏᴘᴛɪᴏɴ D

ᴀs ᴛʜᴇ ᴅᴏᴛ ɪs ᴘᴏɪɴᴛᴇᴅ ʙᴇᴛᴡᴇᴇɴ -15 ᴀɴᴅ -20

Answer:

You Need To add a picture

Step-by-step explanation:

But if the decimal is before a number and has a line then its repeating if not its nonrepeating

Answer: The commutative property

Step-by-step explanation: The commutative property is where an equations can be swapped and not change the answer. The following is true with that problem.

Answer:

105

Step-by-step explanation:

A straight line is 180 degrees so 180-75=105

Answer:

x= 105 degrees

Step-by-step explanation:

We know that the sum of x and 75 degrees is equal to 180 degrees.

So that means that x= 180-75 or x=105 degrees

Answer:85

Step-by-step explanation:

Answer:

3.5 trash cans

Step-by-step explanation:

I divided 1,190 by 340 and got 3.5 trash cans

Answer:

e

Step-by-step explanation:

If you divide 36 by 12, you get 3.

For this to work, whatever the white wax is, it needs to be 3 times as more as 5.

5x3=15

Answer:

i’ve done this before

Step-by-step explanation:

E and D

for every 12ml of red wax there’s 5 ml of white wax right? so you just multiply them at the same number to see if it matches.

12 x 5 = 60

5 x 5 = 25

12 x 3 = 36

5 x 3 = 15

Answer:

58 dimes and 18 nickels

Step-by-step explanation:

Answer:

Step-by-step explanation:

L = 5 m

area = L×W = 176 m²

5W = 176

W  = 176/5 = 35.2 m

Answer:

0.2857 = 28.57% probability that in a year the shares will be selling between $21 and $24

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

The price is approximately normally distributed with a mean of 20 and a standard deviation of 2.

This means that [tex]\mu = 20, \sigma = 2[/tex]

What is the probability that in a year the shares will be selling between $21 and $24

This is the pvalue of Z when X = 24 subtracted by the pvalue of Z when X = 21. So

X = 24:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{24 - 20}{2}[/tex]

[tex]Z = 2[/tex]

[tex]Z = 2[/tex] has a pvalue of 0.9772

X = 21:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{21 - 20}{2}[/tex]

[tex]Z = 0.5[/tex]

[tex]Z = 0.5[/tex] has a pvalue of 0.6915

0.9772 - 0.6915 = 0.2857

0.2857 = 28.57% probability that in a year the shares will be selling between $21 and $24

Answer:

55+3/8 -1/2=55-3×2/8=55-3/4=54.25