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professor190 [17]
2 years ago
13

PLEASE HELP ASAP PLEASE

Mathematics
1 answer:
Juliette [100K]2 years ago
3 0

Answer: #20, x = 3

              #21,  x = 1/2

Step-by-step explanation:

#20) x + 4 + x + 2+ x + 5  = x + 3 +x+3+x+1+x+1

3x + 11 = 4x + 8

<u>-3x           -3x</u>

      11= x + 8

  <u>   - 8       - 8</u>

     3   =   x

#21)  12x(5) = 6x + 9 + x + 10 + x + 7

         60x =8x + 26

       <u>   -8x    -8x</u>

         52x = 26

 divide both sides by 52

         x = 1/2

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Solve F(x) for the given domain. <br> F(x) = x ^2 + 3x - 2 <br> F(3) = <br> 13<br> 16<br> 40
olchik [2.2K]
F(3) = 16, you simply plug in 3 for x to find the answer.
6 0
3 years ago
How many minutes are there between 8:20 p.m. and 10:05 p.m.​
Fed [463]

Answer:

105 minutes.

Step-by-step explanation:

first you would subtract 60 by 20 to get 40 then your time would be at 9:00 so in order to get to 10:00 you would have 60 minutes which you would add the 40 to to get 100 minutes then add 5 to bring your time to 10:05 and your total number of minutes to 105

7 0
3 years ago
Triangle ABC is equilateral. Find the height of BD
RideAnS [48]

Since ABC is equilateral, all 3 sides have equal length. side AC is 8 units since side BC is 8 units.

Line BD is placed in the middle, making D the midpoint of side AC.

knowing this information we can determine that the length of DC is 4 units (half of AC)

since triangle BDC is a right triangle, we can use the side lengths in the pythagorean theorem to find the length of BD

a²+b²=c² where a & b = legs of triangle , and c= hypotenuse (longest side)

we are given the hypotenuse and found one leg so we can plug our values into the equation to find the third

4² + b²= 8²

16 + b² = 64

b² = 48

b = \sqrt{48}

b= 4√3 or about 6.928 units

hope this helped

3 0
3 years ago
A 3-gallon bottle of vinegar costs $26.40.
antiseptic1488 [7]

Answer:

0.55

Step-by-step explanation:

There are 16 cups total in 1 gallon.

Multiply both 16 and 1 by 3.

Your answer so far should be 48 cups and 3 gallons.

Divide $26.40 by 48.

Final answer, $0.55 per cup.

8 0
2 years ago
HALP!!! I DON'T UNDERSTAND!!!!!
irina [24]
To find the percent of error divide how off the wrong answer was by the right number, then multiply by 100.  
Bryan's guess of 730 was 120 less than the actual number so you would divide 120 by 850. 120/850 = 0.141  
Then we would multiply that by 100.  0.141 * 100 = 14.1  
His percent of error was 14.1%. The percent of error is negative since his guess was less than the right answer.

3 0
3 years ago
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