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2 years ago

9

Out of the 20 contestants in the state math championships, 10 are girls. For this round , each constestant gets asked one questi

on. The first question goes to a randomly chosen contestant.

1 answer:

Angelina_Jolie [31]2 years ago

4 0

Answer:

1/20

Step-by-step explanation:

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Solve by using elimination. Express your answer as an ordered pair.

12345 [234]

Answer:

(-2, 5)

Step-by-step explanation:

we subtract 6x+3y=3 by 2x+3y=11 to get 4x=-8.

we divide both sides by 4 to get x. x=-2

We subsitute -2 for the second equation to get:

2(-2)+3y=11

=-4+3y=11

=3y=15

y=5

4 0

2 years ago

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KatRina [158]

Your answer is 40mm

3+12+12+13
=40

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3 years ago

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Height: 15 ft <br> area: 285 square feet <br><br> find the missing dimension for the triangle

seraphim [82]

A=1/2 B×h
285=1/2×B×15
B=38 feet, so the base of the triangle is 38 feet. Hope it help!

4 0

3 years ago

Does anyone know this?

seropon [69]

Answer:

-124

Step-by-step explanation:

The equation for a discriminant is:

$b^{2} -4ac$

So for

$7x^{2} -4x +5=0$

a = 7 b = - 4 c = 5

Plug values into the equation.

$(-4)^{2} -4(7)(5)$

16 - 140 = -124

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3 years ago

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Simplify: (2^2 + 3^4)^-2

borishaifa [10]

the answer is 1 over 7225 if u want to know use cymath

5 0

3 years ago

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