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3 years ago

Please answer in a little bit detail

Mathematics

1 answer:

xeze [42]3 years ago

6 0

Answer:

what the heck i think pre-alegbra is hard what do they expect from us ? the mother freaking world ? like no

Step-by-step explanation:

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Y=2x+5 y=3x−1 solve by subsitution

loris [4]

Answer:

(6,17)

Step-by-step explanation:

2x+5=3x-1

-3x -3x

-x+5=-1

-5 -5

-x=-6

^divided by -1 on both sides

x=6

y=2x+5

y=(2)(6)+5

y=17

5 0

3 years ago

Ms. Jones washed 2/5 of her laundry. Her son washed 1/4 of it. How much of the laundry still needs to be washed?

Andrew [12]

Answer:

Give me a heart and 5 stars

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

It is given that y varies inversely as x^2. If x is decreased by 50%, find the percentage change in y.

vova2212 [387]

Answer:

300%

Step-by-step explanation:

Given

$y\ \alpha\ \frac{1}{x^2}$

Required

Find the percentage change in y when x decreased by 50%

First, convert to equation

$y\ = \ \frac{k}{x^2}$

Where k is the constant of proportionality

When x decreased by 50%

$Y = \frac{k}{(x - 0.5x)^2}$

$Y = \frac{k}{(0.5x)^2}$

$Y = \frac{k}{0.25x^2}$

Expand

$Y = \frac{1}{0.25} * \frac{k}{x^2}$

Substitute $\frac{k}{x^2}$ for y

$Y = \frac{1}{0.25} * y$

$Y = 4 * y$

$Y = 4 y$

The percentage change is then calculated as:

$\%Change = \frac{Y - y}{y} * 100\%$

$\%Change = \frac{4y - y}{y} * 100\%$

$\%Change = \frac{3y}{y} * 100\%$

$\%Change = 3 * 100\%$

$\%Change = 300\%$

The percentage in y is 300%

7 0

3 years ago

12 bars of chocolate costs $3.00 . What is the cost of each chocolate bar?

andre [41]

Answer:

$0.25

Step-by-step explanation:

Divide the cost by the amount.

$\frac{3}{12}=0.25$

Therefore, the cost of each chocolate bar is $0.25.

7 0

3 years ago

The angles measures x and 4x are complementary angles. Which is the value of x?

Hitman42 [59]

Answer:

The angles measures x and 4x are complementary angles. The value of x is 36 degrees

Solution:

Given, two angles are x and 4x

We have to find the value of above given x

We are also given that, given two angles are complementary angles for each other

So, we know that, sum of any two complementary angles will always be equal to 180 degrees

Then, in the problem given,

$x+4 x=180 \rightarrow 5 x=180 \rightarrow x=\frac{180}{5} \rightarrow x=36$

Hence the angles measures x and 4x are complementary angles. The value of x is 36 degrees

3 0

3 years ago

Read 2 more answers

Please answer in a little bit detail ​

Please answer in a little bit detail