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andreev551 [17]
3 years ago
13

Got it wrong plss help and explain

Mathematics
1 answer:
Karolina [17]3 years ago
8 0
Because it says "not black" we would do white marbles
There are 15 white marbles and a total of 20
So the fraction of white marbles to total would be 15/20

Because the answer is wanted as a decimal divide 15 by 20
15/20=.75

There is a .75 chance that she will not draw a black marble
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Elanso [62]

Hello from MrBillDoesMath!

Answer:

x = 10


Discussion:

A plane triangle contains 180 degrees. Adding the angles in the triangle shown in  #8 gives

(4x + 7) + (3x + 13) + 90 = 180


Note the "right angle" shown in the triangle has been replaced by its 90 degree equivalent in the above equation.

Combining like terms gives


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7x +20 = 90  =>                                (subtract 20 from each side)

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3 0
3 years ago
4. Express each of the following in m/s.
Alex17521 [72]

{ \large{ \purple{ \sf{Hello  \: there!}}}}

As we know that, 1 cm = 0.01 m

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(a) 65 cm/s = 0.65 m/s

b) 367 km/h = (367 × 5 ÷ 18) m/s

c) 1000 cm/min = (1000 × 60 ÷ 100) m/s

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\star \:{ \underline{ \boxed{ \sf{ \blue{Thank  \: you : )  }}}}}

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First, you have to multiply $0.95 x 9 = $8.55


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