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3 years ago

Please help me thanks

Mathematics

1 answer:

Artist 52 [7]3 years ago

3 0

Answer:

11/13

Step-by-step explanation:

4 out of the 26 marbles are blue, meaning that the rest of the 22 marbles are not blue. (26-4=22)

This means that out of the total 26, the chance of not picking a blue marble are 22/26=11/13

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If B is between A and C and AB = 3x + 1, BC = 2x - 7, and AC = 24, then<br> find the value of x.

mr Goodwill [35]

AB + BC = AC

3x+1 +2x -7 = 24

5x -6 = 24

5x = 30

x = 6

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3 years ago

Solve for x: -5x = -45

galina1969 [7]

Answer:

x=9

Step-by-step explanation:

Isolate the variable you are solving for.

In this case, -5x needs to be divided by -5 to isolate x. But you must do to one side of the equation what you did to the other, so -45 must also be divided by -5x.

-5x/-5=-45/-5

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3 years ago

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Convert 60 mi/hr to feet per second

Alecsey [184]

Answer:

Step-by-step explanation:

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3 years ago

Find the coordinates of the circumcenter for ∆DEF with coordinates D(1,3) E (8,3) and F(1,-5).

NemiM [27]

Let the coordinates of the circumcentre O of the triangle DEF be (x, y). Circumcentre of a triangle is equidistant from each of the vertices.

1. Distance OD=distance OE, then:

$(x-1)^2+(y-3)^2=(x-8)^2+(y-3)^2$ .

2. Distance OD=distance OE, then:

$(x-1)^2+(y-3)^2=(x-1)^2+(y+5)^2$ .

Solve the system:

$\left\{\begin{array}{l} (x-1)^2+(y-3)^2=(x-8)^2+(y-3)^2 \\ (x-1)^2+(y-3)^2=(x-1)^2+(y+5)^2 \end{array}\right.$ ,

$\left\{\begin{array}{l} x^2-2x+1+y^2-6y+9=x^2-16x+64+y^2-6y+9 \\ x^2-2x+1+y^2-6y+9=x^2-2x+1+y^2+10y+25 \end{array}\right.$ ,

$\left\{\begin{array}{l} 14x=63 \\ -16y=16 \end{array}\right.$ .

Then

$x=\dfrac{63}{14} =\dfrac{9}{2} =4.5,\\ \\ y=-1$ .

Answer: the coordinates of the circumcenter for ∆DEF are x=4.5, y=-1.

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4 years ago

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solniwko [45]

Answer:

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Step-by-step explanation:

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3 years ago

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