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3 years ago

Is y = − 52 x − 57 increasing or decreasing? decreasing or increasing

Mathematics

1 answer:

ArbitrLikvidat [17]3 years ago

3 0

Answer:

Decreasing

Step-by-step explanation:

Pick any value of X greater than zero.

If you plug in 10 for x, then Y = -577,

If you plug in 0, then Y = -57.

The greater the X, the Smaller Y.

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Emily has a coupon for 20 percent off her purchase. She finds a backpack she likes on the discount rack. It’s original price is

Bas_tet [7]

She’s incorrect I’m pretty sure u divide 20 and 60.

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3 years ago

Darias bought 5 school binders that cost $8.00 per

Natalka [10]

Answer:

$25.44

Step-by-step explanation:

First, find the original cost of the binders:

5(8)

= $40

Find the cost with the 40% discount:

40(0.6)

= $24

Find the cost with the 6% sales tax:

24(1.06)

= $25.44

So, the total cost of the binders was $25.44

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2 years ago

Kiley can complete 3 math problems in 1 1/4 hours. How many can she complete in one hour

Sergio [31]

3/(5/4) = x/1
x = 12/5 = 2.4 Problems/h

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4 years ago

Read 2 more answers

Which answer best describes the solution to the equation

SCORPION-xisa [38]

4 + 5z = 5z + 4 is an identity and is true for all values of z.

The equation has, therefore, infinitely many solutions.

3 0

3 years ago

Read 2 more answers

Find the equation of the line that passes through the points (-5,7) and (2,3)

Olegator [25]

Answer:

$y=-\frac{4}{7}x+4\frac{1}{7}$

Step-by-step explanation:

So, in order to solve this problem, I started off by drawing it out. On my graph that I have attached below, I first started out by locating the points (-5,7) and (2,3). Now, this is an optional step, but I highly encourage practicing your graphing skills by solving this problem on graph paper as well. Next, I connected the two points that I just graphed. This is the line that passes through (-5,7) and (2,3).

Now, here is where the actual solving starts. If you haven't already been taught this yet, I will introduce it to you now. I am going to find the equation of this line by filling in what I know in the equation y=mx+b, where m= the slope of the line, and b= y intercept.

Slope of the line: m= $\frac{y_{1} - y_{2} }{x_{1} - x_{2} } = \frac{7-3}{-5-2} = \frac{4}{-7}= -\frac{4}{7}$

If you haven't been taught how to find the slope of a line I recommend you find out.

Substitute the slope into the equation.

$y=-\frac{4}{7} x+b\\$

Now, we will solve for the 'b,' or y intercept.

We already have x and y values to use: (-5,7) or (2,3). I'll use x=2 and y=3 to solve for the y intercept.

$y=-\frac{4}{7} x+b\\\\3=-\frac{4}{7} *2+b\\\\3=-\frac{8}{7} +b\\b=3+\frac{8}{7} \\b=\frac{21}{7}+\frac{8}{7}=\frac{29}{7} =4\frac{1}{7} \\b=4\frac{1}{7}$

Last step: substitute the slope and y intercept into y=mx+b.

$y=mx+b\\y=-\frac{4}{7}x+4\frac{1}{7}$

That is the answer to this problem.

I hope this helps.

3 0

3 years ago