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2 years ago

Solve the equation for y 1/2y - 21/4 = -35/4

Mathematics

1 answer:

mina [271]2 years ago

5 0

Answer:

$1/2y - 21/4 = -35/4$

$1/2y = 21/4 -35/4$

$1/2y = - 7/4$

$y = - \frac{7}{2}$

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2 number cubes are rolled. (a) List the sample space. (b)What is the probability, as a simplified fraction, that the sum of the

melomori [17]

Solution:

When two number cubes are rolled,

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Probability of an event = $\frac{\text{Total favorable outcome}}{\text{Total possible outcome}}$

Sum of 4 is obtained when ={13,31,22}=3

Probability of getting 4 when 2 number cubes are rolled= $\frac{3}{36}=\frac{1}{12}$

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3 years ago

Find the area of the yellow area shown here<br> a. 4x^2+2x+6<br> b.2x^2+4x+6<br> c.2x^2+2x+6

Airida [17]

The horizontal yellow are is : 2(x+3) = 2x + 6

The vertical yellow are is : x(x+2+x) = x(2x+2) = 2x² + 2x

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3 years ago

Yesterday, teddy played a game repeatedly on his computer and won exactly 85% of the games he played. today, teddy played the sa

Eduardwww [97]

The equation we use here is:
$(0.85)x +(1.00)y = (0.94)(x + y)$
x is for the number of games he played on first day, y is the games on second day. The coefficients are the decimal form of percentages.

Simplify:
$0.85x + y = 0.94x + 0.94y \\ \\ 0.06y = 0.09x \\ \\ \frac{6y}{100} = \frac{9x}{100} \\ \\ 6y = 9x \\ \\ 2y = 3x$

To find x we need to use the ratio. We have 85/100 as the first day's ratio and because the games needs to be whole, we can simplify this as 17/20. So in first day, he played at least 20 games and won 17 of them.

When we plug the 20 into the equation as x:
$2y = 3 \times 20 \\ \\ 2y = 60 \\ \\ y = 30$
So he needs to play at least 30 games in order to get his score to 94%.

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3 years ago

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pychu [463]

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2 years ago

What is -2•-11 equal to

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2 years ago

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