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Anarel [89]
3 years ago
6

Which is the correct for of the equation 4x-3y=21 when solved for y Please help

Mathematics
2 answers:
raketka [301]3 years ago
7 0
Y=-3/4x-7 is the answer because you have to move everything to the right.
kkurt [141]3 years ago
4 0
Move all terms that dont contain y to the right side and solve and you get:
y=4x/3-7
Hope this helps
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Pls help. I rly don't understand it.​
yulyashka [42]

Answer:

You just need to demonstrate that the expression is not equivalent. To do that, we just need to evaluate the expression with a specific number.

\frac{3}{8}x+2 \neq  \frac{3}{2}x+5

For x=0, we have

\frac{3}{8}(0)+2 \neq  \frac{3}{2}(0)+5\\2 \neq 5

Notice that the answer is true because 2 is not equivalent to 5.

Therefore, the expression is actually non-equivalent.

4 0
3 years ago
When graphing y = 2x2 + 35x + 75, which viewing window would allow you to see all of the intercepts and the minimum as closely a
djverab [1.8K]

The intercept with the y-axes occurs when x = 0

f(0) = 2*02 + 35*0 + 75 = 0 + 0 + 75 = 75

So intercept with x axes is the point (0,75)

The intercept with the x-axes occurs when y=0

2x2 + 35x + 75 = 0

<span>As there’s no direct way to find x, we can use the <span>Bhaskara formula:</span></span>

x=(-b+- square root (b2-4ac))/(2a)

This formula is for: ax2 +bx + c = 0

So:

a=2

b=35

c=75

x=(-35+- square root (35^2-4*2*75))/(2*2)

So x can be -2.5 or -15

So intercept with y axes are the points (-2.5,0) and (-15,0)

And there is also a formula to find the mínimum. The mínimum is always the vertex:

Xv = -b/(2*a) = -35/(2*2) = -8.75

Yv = f(Xv) = f(-8.75) = 2(-8.75)^2 + 35(-8.75) <span> + 75 = </span>-78.125

So the minimum is the point (-8.75, -78.125)

You can easily verify all these data with a graphic software such as GeoGebra.

Here is the complete list of all the points we need to see:

(0,75); (-2.5,0) ; (-15,0), (-8.75, -78.125)

So the mínimum X has to be -15 and the máximum X has to be 0

and the mínimum Y has to be -78.125 and the máximum Y has to be 75

So this leads to a different scale for X and for Y.


Window x = [ -15, 0] y = [ -78.125, 75]
5 0
3 years ago
Transversal t cuts parallel lines a and bas shown in the diagram. Which equation is necessarily true?
irina1246 [14]

Answer:

Option D is correct

Step-by-step explanation:

Using the given diagram, we want to know the equation that is true

Option A is wrong as both are on a straight line and in fact should add up to equal 180 and not be equal to each other

Option B is not correct as both are supplementary and does not equal each other

Option C is not correct, both are corresponding to each other and should not add up to 90

Option D is correct

Both angles are supplementary as they are exterior angles that add up to 180

4 0
3 years ago
Kate and Margaret spend $42.60 on dinner at a restaurant
dlinn [17]

H, it's asking for the total amount of money spent. so you add.

3 0
3 years ago
Find the missing lengths of the sides.
Irina18 [472]

Answer:

The choice third ; a=9 , c= 18

Step-by-step explanation:

\sin(60)  =  \frac{9 \sqrt{3} }{c} \\  \\ c = 18

\tan(30)  =  \frac{a}{9 \sqrt{3} }  \\  \\ a = 9

3 0
2 years ago
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