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horrorfan [7]
3 years ago
15

2 - 3 (2x - 5) = 6x + 1

Mathematics
1 answer:
Nataliya [291]3 years ago
4 0
2 - 3 (2x - 5) = 6x + 1
2 -6x +15 = 6x +1  distribute the -3 to (2x -5)
-6x + 17 = 6x + 1  add 2 + 15
16 = 12x add the -6x to the positive 6x and subtract the 1 from 17
1 1/3 = x divide 16/12
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I really need help on this one
ladessa [460]

Answer:

Step-by-step explanation:

1.Find X

x^2 +8x+15 = (x+5)

       -x             -x

x^2+7x+15=5

            -5  -5

x^2 +7x+10=0

Do the quadralic formula

a=1 b=7 c=10

<u>-7±√7^2-4(1)(10)</u>

          2(1)

<u>-7±√49-40</u>

        2

<u>-7±√9</u>

    2

-7±3

divide 2 by each number

-3.5 ± 1.5

-3.5+1.5           -3.5-1.5

     -2                    -5

x= -2 x=-5

2. find the length of the garden

-2+5 =3

the length is 3

3. plug in the length to the area of the garden

-5^2+8(-5)+15=3

solve

25-40+15=3

0=3

the width of the garden is 3 square feet

7 0
3 years ago
Determine the values of the letters to complete the conditional relative frequency table by column. A = b =.
elena-14-01-66 [18.8K]

Conditional relative frequency is the ratio of the the value of somthing with the total value for a set in data table. The value of the letter <em>a</em> is 0.1 and the value of the letter <em>b</em> is 0.85.

Given information

In the given table,

For the 16 year old weekend curfew is 0.9 before 10 pm and <em>a </em>after 10 pm in total 1.

For the 17 year old weekend curfew is <em>b</em> before 10 pm and 0.15<em> </em>after 10 pm in total 1.

There is total are with 0.88 before 10 pm and 0.12 after 10 pm in total of 1.

<h3>Conditional relative frequency-</h3>

Conditional relative frequency is the ratio of the the value of somthing with the total value for a set in data table.

As for the relative conditional frequency the sum of the frequencies of each column should be equal to the one.

Hence for column two given in the table,

0.9+a=1

Solve for<em> a</em>,

a=1-0.9\\a=0.1

Thus the value of the letter <em>a</em> is 0.1.

Hence for column three given in the table,

b+0.15=1

Solve for<em> a</em>,

b=1-0.15\\b=0.85

Thus the value of the letter <em>b</em> is 0.85.

Learn more about the conditional relative frequency  here;

brainly.com/question/3444575

8 0
3 years ago
Jacob and Zachary go to the movie theater and purchase refreshments for their friends. Jacob
son4ous [18]
Ok lets say
popcorn = x and
drinks = y

Jacob:      2x + 3y = 18.25
Zachary:   4x + 2y = 27.50

ok now you have to use these 2 equations to get the answer

4x + 2y = 27.50  --->   2y = 27.50 - 4x   --->  y = 13.75 - 2x

2x + 3y = 18.25
2x + 3(13.75-2x) = 18.25
2x + 41.25 - 6x = 18.25
-4x + 41.25 = 18.25
-4x = -23
x = 5.75             <u><em>One bag of popcorn is $5.75</em></u><em />


4x + 2y = 27.50
4(5.75) + 2y = 27.50
23 + 2y = 27.50
2y = 4.50
y = 2.25             <u><em>One drink is $2.25</em></u><em />

4 0
3 years ago
Read 2 more answers
WILL MARK AS BRAINLIEST!!!!!
natulia [17]
The answer is Y=2x+1 :)
4 0
3 years ago
Write the missing blank with &lt;,&gt;,or=.<br>(-5)(8)+3 blank (-6)(7)+1
aliina [53]
(-5)(8)+3  (blank)  (-6)(7)+1

(-40)+3                 (-42) +1

(-37)       ( > )      (-41)
4 0
3 years ago
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