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k0ka [10]
3 years ago
11

Change ratio to actual numbers

Mathematics
2 answers:
joja [24]3 years ago
7 0

Ratio = Proportion

Ex. 3:4 = 7

Iteru [2.4K]3 years ago
6 0
3:4 is the correct answer
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A student solved a quadratic equation as shown here:
djverab [1.8K]

Answer:

x = 3/2 or x = -4

Step-by-step explanation:

The identifiable error the students have is that before the left hand side of the equation is factorized, the right hand side value of 12 ought to be brought to the left hand side, leaving a net value of zero on the right hand side. Then whatever is factored  on the left hand side is then equated to zero and then we can find the two values of x after setting each of the individual factors to zero

We proceed as follows;

2x^{2} + 5x = 12\\2x^{2} + 5x - 12 = 0\\2x^{2} + 8x -3x -12 = 0\\2x(x+4) -3(x+4) = 0\\(2x-3)(x+4) = 0\\2x-3 = 0 or x+4 =0\\2x=3 or x=-4\\x = 3/2 or x= -4\\x = 1.5 or- 4

6 0
3 years ago
On a map, Orlando is 187 millimeters due south of Niagara Falls, Denver is 282 millimetersfrom Orlando, and Denver is 244 millim
Agata [3.3K]

Answer:

S80.6°W

Explanation:

From the diagram:

• Niagara Falls to Denver, a = 244 millimeters

,

• Niagara Falls to Orlando, b = 187 millimeters

,

• Denver to Orlando, c = 282 millimeters

To find the bearing of Denver from Niagra falls, the first thing is to find the angle at Niagra Falls(C) using the Law of Cosines.

Angle C is opposite side c.

From the law of cosines:

\begin{gathered} \cos C=\frac{a^2+b^2-c^2}{2ab} \\ \implies\cos C=\frac{244^2+187^2-282^2}{2\mleft(244\mright)\mleft(187\mright)} \end{gathered}

We solve the equation for the value of angle C:

\begin{gathered} \cos C=0.1642 \\ C=\arccos (0.1642) \\ C=80.55\degree\approx80.6\degree \end{gathered}

Recall that Orlando is due South of Niagara Falls.

Thus, the bearing of Denver from Niagara Falls is S80.6°W.

4 0
1 year ago
I need help with number 17. <br><br> Please explain your answer.
Phoenix [80]
2*.75= 1.5

2(x+1.1)= 2x+2.2

2x+2.2+1.5

2x+3.7

the answer to the question is e
6 0
3 years ago
Need help with these questions
maria [59]

Answer:

Step-by-step explanation:

2) When x = 6

x - 2y = 8

6 - 2y = 8

    -2y = 8 - 6

    -2y = 2

       y = 2/-2

     y = -1

Yes, (6, -1) lies on the line.

3) No, (-2 , -3) is not on the line

4) (-2 , -3) is not a solution to this equation because it does not lie on the line.

7 0
3 years ago
List the next four multiples of the unit fraction 1/2 4th grade
OleMash [197]
<h2>The next four multiples of the unit fraction \dfrac{1}{2} are</h2><h2>\dfrac{2}{2} ( 1), \dfrac{3}{2}, \dfrac{4}{2} (2) and \dfrac{5}{2}.</h2>

Step-by-step explanation:

We have:

The unit fraction = \dfrac{1}{2}

To find, the next four multiples of the unit fraction \dfrac{1}{2} = ?

∴ The next four multiples of the unit fraction \dfrac{1}{2}

The first multiple = \dfrac{1}{2}\times 2= \dfrac{2}{2} =1

The second multiple = \dfrac{1}{2}\times 3= \dfrac{3}{2}

The third multiple = \dfrac{1}{2}\times 4= \dfrac{4}{2} =2

The fourth multiple = \dfrac{1}{2}\times 5= \dfrac{5}{2}

∴ The next four multiples of the unit fraction \dfrac{1}{2} are

\dfrac{2}{2} ( 1), \dfrac{3}{2}, \dfrac{4}{2} (2) and \dfrac{5}{2}.

6 0
3 years ago
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