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3 years ago

Find the sum of 5x+20 and the opposite of 20. Write an equivalent expression in standard form. Justify each step.

Mathematics

2 answers:

Mrrafil [7]3 years ago

7 0

The answer would more than likely to be 4..
because u divide 5 on both sides and it will give you x=4

Artemon [7]3 years ago

6 0

Do 5x + 1 instead of 5x + 20, because there was more than likely a mistype.

Now we are also looking for the reciprocal so we do (5x + 1)/20

Either that is the answer or there is something missing. If this is not the answer then there needs to be a number we can set the equation equal to

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Would like scatter plot image with line of best fit on the plot

dlinn [17]

Just take it in co-ordinate pairs

(x,y)=(Arm span,Height)

Take two points

(58,60)
(41,40)

Slope:-

$\\ \sf\longmapsto m=\dfrac{40-60}{41-58}$

$\\ \sf\longmapsto m=\dfrac{-20}{-17}$

$\\ \sf\longmapsto m=\dfrac{20}{17}$

$\\ \sf\longmapsto m\approx 1.2$

Equation of line in point slope form

$\\ \sf\longmapsto y-y_1=m(x-x_1)$

$\\ \sf\longmapsto y-60=1.2(x-58)$

$\\ \sf\longmapsto y-60=1.2x-69.6$

$\\ \sf\longmapsto 1.2x-y-9.6=0$

Convert to slope intercept form y=mx+b

$\\ \sf\longmapsto y=1.2x-9.6$

Graph attached

7 0

2 years ago

Which expression is equivalent to the following expression? 10x + 3(8 - 7x)

Paladinen [302]

It is -11x + 24 because you multiply the numbers in the parentheses by 3 then collect like terms 10x +24 - 21x then you do 10x minus 24x and you get -11x+24

7 0

3 years ago

Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

ra1l [238]

It is already in identity.
cos (x - y) - cos (x + y) = 2 sin(x) sin (y)

8 0

3 years ago

Solve for J MUST SHOW WORK<br> j/-2 + 7 = -12<br><br> thx!!

Ronch [10]

Answer:

j=38

Step-by-step explanation:

j/-2 +7=-12, subtract 7 from both sides of the equation and you get j/-2 = -19, then you multiply j/-2 by -2/1 and multiply -19 by -2/1 to get j= 38

5 0

2 years ago

Given a slope and a point write a perpendicular equation in standard form.

jeyben [28]

Hi there! The answer would be:

y=-2/5x+2.

Explanation:
We can start by plotting the given point (-5,3). From there, we can use the slope to place other points to find the y intercept. Using the slope of the graph, we can find that the line segment hits (2,0). Therefore, how answer would be: y=-2/5x+2

Hope this helps!!! :DD
mark brainliest if possible! If not, that’s okay!

5 0

3 years ago