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victus00 [196]
3 years ago
13

Solve the equation 2x2 – 13x + 14 = 0 to the nearest tenth.

Mathematics
1 answer:
timofeeve [1]3 years ago
5 0

Answer:

x=\frac{13+\sqrt{57}}{4},\:x=\frac{13-\sqrt{57}}{4}

x=5.1 , 1.4

Step-by-step explanation:

use quadratic equation

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Bea can run 1/6 mile in 2 minutes. How long should it take her to run 2 miles?
suter [353]
24 min is how long it should take

5 0
3 years ago
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I need step by step explanation for this!!
Naily [24]

Hello! :)

Answer:

\huge\boxed{751}

Let the smallest digit, or the units' digit, be equal to x:

Tens' digit is four more, therefore:

x + 4 represents the tens' digit.

Hundreds' digit is 2 more than the tens' digit, so:

2 + (x + 4), or x + 6 represents the hundred's digit.

These all sum up to 13, so write an expression to represent this:

x + (x + 4) + (x + 6) = 13

Combine like terms:

3x + 10 = 13

Subtract 10 from both sides:

3x = 3

Divide both sides by 3:

x = 1

Find the digits using the rules listed above:

Hundreds' digit: (1) + 6 = 7

Tenths' digit:  (1) + 4 = 5

Units' digit: 1 = 1

Therefore, the number is:

751.

4 0
3 years ago
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What is the slope of a ladder leaning against the wall? (10 ft, 9ft, 3ft)
allsm [11]

the ladder leaning against the wall has slope 3

7 0
3 years ago
How? (2x^2 - 3x - 4)(x + 7)<br>​
lidiya [134]

Answer:

2 {x}^{3}  +  11{x}^{2}  - 25x - 28

Step-by-step explanation:

Using foil method, Multiply the first term

2 {x}^{2}  \times x = 2 {x}^{3}

Next, Multiply the Outer term in each parenthesis. (2x^2 and 7

2 {x}^{2}  \times 7 = 14 {x}^{2}

2 {x}^{2}  \times 7 = 14 {x}^{2}  \:  \:  \: 3x \times  - x =  - 3x

Then, Multiply the Inner Terms (-3x,-4,7) in each parenthesis

- 3x \times 7 =  - 21x

- 4 \times x =  - 4x

Then multiply the last term (-4 and 7).

- 4 \times 7 =  - 28

Combine it you have

2 {x}^{3}  + 14 {x}^{2}   - 3 {x}^{2}  - 21x - 4x - 28

which simplify to

2 {x}^{3}  + 11 {x}^{2}  - 25x - 28

3 0
3 years ago
Determine whether the following system of equations has one solution, no solution, or an infinite number of solutions. Explain y
expeople1 [14]
<span>A) 2x - 4y = 10
B) 7x - 9y = 12
Multiplying equation A by -3.5
A) -7x +14y = -35 then adding B
B) </span><span><span>7x - 9y = 12</span>
5y = -23
y = -4.6
</span>
2x -4*-4.6 = 10
2x + 18.4 = 10
2x = -8.4
x = -4.2
It has one solution (-4.2, -4.6)
 


6 0
3 years ago
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