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Annette [7]
3 years ago
11

Find the value of x that makes this equation true, just write a number for your answer. Use / for writing fractions

Mathematics
1 answer:
grandymaker [24]3 years ago
4 0

Answer:

8/21 = -2/7x

8*7x/21 = -2

56x/21 = -2

56x = -2*21

56x = -42

56x/56 = -42/56

<h2>X = -3/4 , -0.75</h2>

Step-by-step explanation:

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A coordinate axis is drawn with a parabola pointing up that has vertex of 0,3. Determine the intervals on which the function is
mel-nik [20]

Answer:

Option (2). Increasing x > 0; decreasing x < 0

Step-by-step explanation:

Equation of the parabola having vertex (0, 3) will be,

y = (x - 0)² + 3

y = x² + 3

To check the function is increasing or decreasing in the given intervals we will find the derivative of the function,

\frac{dy}{dx}=\frac{d}{dx}(x^{2}+3)

y' = 2x

For x < 0 Or x = -1

y' = 2(-1)

  = -2 < 0

Therefore, function is decreasing in x < 0

For x > 0 Or x = 1

y' = 2(1) + 3

  = 5 > 0

Therefore, function is increasing in x > 0

Option (2) is the answer.

8 0
4 years ago
If something takes 12 minutes to do and you have to do it 320 times how long would it take
EastWind [94]

Answer:

It would take 3,840 Minutes

Step-by-step explanation:

Multiply 12 * 320 to receive 3,840

4 0
4 years ago
Read 2 more answers
10 divided by 2-(16 divided by 4) +14
ankoles [38]

Answer:

15

Step-by-step explanation:

okay so you gotta use pemdas (p = parentheses, e = exponents, m = multiplication, d = division, a = addition, s = subtraction), but for the multiplication/division and addition/subtraction parts, if  division or subtraction happens first then you must do it first rather than doing multiplication or addition first

10 / 2 -(16/4) + 14

10 / 2 -(4) + 14

5 - 4 + 14

1 + 14

15

7 0
3 years ago
Read 2 more answers
A set of data already has the values 11, 14, 23, and 16. What value would have to be added to the set for the mean of the five n
KonstantinChe [14]
1) Take 18 and multiply it by 5 = 90
2) Then subtract 26 = 64
3) Then subtract 18 = 46
4) Then subtract 12 = 34
5)  Then subtract 8 = 26
 
The answer is 26.

5 0
3 years ago
A painting contractor paints with a brush at a rate of 192 square feet per hour. using a paint sprayer, she is able to cover 576
lara31 [8.8K]

Hi there,

2400 + 1632 = 4032

3 * 192 = 576

4032 - 576 =>

3532 - 76 =>

3532 + 24 - 76 - 24

3556 - 100

3456


3456 / 576 => 6

Therefore, 6 hours of sprayer work

Hope this helps!

Sincerely,

Dus4nR

5 0
3 years ago
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