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3 years ago

27a+21 i need to solve thi problem help me

Mathematics

1 answer:

Anika [276]3 years ago

8 0

That's an expression, so the only thing you can do is simplify it, but that already looks simplified.

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DETERMINE IF A FUNCTION OR NOT<br><br>WILL MARK BRAINLIEST FOR CORRECT ANSWERS

balu736 [363]

Answer:

Relation 3: yes, it can be a function

Relation 4: no, it cannot be a function

Step-by-step explanation:

in a function, for every input x there can only be one correlating output y.

4 0

3 years ago

The maximum grade allowed between two stations in a rapid-transit rail system is 3.5%. Between station A and station B, which

azamat

Answer:

Part a) The grade is 3.2%

Part b) This grade meet the rapid-transit rail standard

Step-by-step explanation:

we know that

The formula of slope is "rise over run", where the "rise" (means change in y, up or down) and the "run" (means change in x, left or right)

In this problem we have

$rise=8\frac{1}{2}\ ft=\frac{8*2+1}{2}=\frac{17}{2}\ ft$

$run=270\ ft$

$\frac{rise}{run}=\frac{17}{2}:270=0.0315$

convert to percentage

$0.0315*100=3.15\%$

Round to the nearest tenth of a percent

$3.2\%$

$3.2\% < 3.5\%$

therefore

This grade meet the rapid-transit rail standard

5 0

3 years ago

Area & Surface Area Question<br> help me please!

pav-90 [236]

The area of a rectangle is given by its base times its height.

In this case,

$A=7\times5\\\\\boxed{A=35 \text{ units}^2}$

3 0

3 years ago

Read 2 more answers

CHECK MY ANSWERS ASAP

AlexFokin [52]

Question 1:

For this case we must rewrite the following equation:

$-3x + y = 5$

If we add 3x to both sides of the equation we have:

$y = 5 + 3x$

Thus, we have that an equivalent expression is option C.

Answer:

Option C

$y = 5 + 3x$

Question 2:

For this case we must solve the following equation:

$-5x + 5 = -40$

Subtracting 5 from both sides of the equation we have:

$-5x = -40-5\\-5x = -45$

Dividing between -5 on both sides of the equation we have:

$x = \frac {-45} {- 5}\\x = 9$

Answer:

Option B

7 0

3 years ago

Select all the points that are on the graph of the line 2x+4y=20

Pavlova-9 [17]

Answer:

$(x,y)\\\\\Bigg(x, \displaystyle\frac{-1}{2}x+5\Bigg)$

The points on the equation 2x+4y=20.

Step-by-step explanation:

We are given the following in the question:

$2x+4y=20$

Writing this equation in the point slope form,

$y = mx + c$

where m is the slope and c is the y-intercept.

$2x+4y=20\\4y = 20-2x\\\\y =\displaystyle\frac{-1}{2}x+5$

where the slope is $\frac{-1}{2}$ and y-intercept is 5.

The attached image shows graph for the given equation.

All the points on the line for the given equation is of the form:

$(x,y)\\\\\Bigg(x, \displaystyle\frac{-1}{2}x+5\Bigg)$

7 0

3 years ago

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