Is √55.5(-0.45.6)-78% an irrational number

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

Hitman42 [59]

15x - y = - 6.....15x + 6 = y...so we sub in 15x + 6 in for y on the other equation

5x - 3y = -13
5x - 3(15x + 6) = -13 <== the new equation

7 0

3 years ago

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There is a new diagnostic test for a disease that occurs in about 0.05% of the population. The test is not perfect, but will det

Rashid [163]

Answer:

fwadfsfawfafsadawdawdsadwad

Step-by-step explanation:

dwadadsdwadsadwadsadwad

7 0

3 years ago

find the equation of straight line which passes through the point of intersection of straight lines.x+2y+3=0 and 3x+4y=7 and par

erastovalidia [21]

Answer:

Equation of the line in question: $y = x - 21$ .

Step-by-step explanation:

Start by finding the intersection of the two straight lines. The equation for both lines shall hold at their intersection. (Using the idea of the Gaussian Elimination.)

$\left\{\begin{aligned}&x + 2y =-3\\&3x + 4y=7\end{aligned}\right.$ .

Add -3 times the first equation to the second:

$\left\{\begin{aligned}&x + 2y =-3\\& -2y=16\end{aligned}\right.$ .

Add the second equation $-2y=16$ to the first:

$\left\{\begin{aligned}&x = 13\\&y=-8\end{aligned}\right.$ .

Hence the intersection of the two lines will be $(13, -8)$ .

Now, find the slope of that straight line. $y - x = 8$ is equivalent to $y = x +8$ . The slope of that line is equal to 1. So will be the slope of the line in question.

Apply the point-slope form of a line on a Cartesian plane:

Point: $(13, -8)$ ,
Slope: $1$ .

Equation of the line:

$(y - (-8)) = (x - 13)$ .

Simplify to obtain:

$y = x -21$ .

7 0

3 years ago

The equation 2y+53=165 represents the situation “ Joel spent $165 on a pair of jeans and two shirts at the same price.” What doe

Anvisha [2.4K]

1. answer is C

2. answer is D

3. answer is A

7 0

3 years ago

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I’m begging you help me!!! 1. The table below shows 3 recipes for a fruit punch

wariber [46]

Answer:

The answer to this question is given below in the explanation section.

Step-by-step explanation:

The table shows three different recipes. In this question, it is asked that will all the recipes taste same. To obtain the answer to this question, first, we measure the taste of each recipe in terms of calculating the ratio.

Water ............................. Cups

1 ............................. 3

4 ............................. 12

6 ............................. 18

1. The fraction of the first recipe is 1/3 so the ratio is 1:3(water to cup)

2. The fraction of the second recipe is 4/12

which can be simplified as 4/12=1/3 so the ratio is 1:3(water to cup)

3. The fraction of the third recipe is 6/18

which can be simplified as 6/18 = 3/9 = 1/3 so the ratio is 1:3(water to cup).

So based on the above answer, all recipes taste the same.

Answer 2:

No recipe taste different, all the recipe taste the same. Because all the recipe ratios are equivalent.

5 0

3 years ago