3 years ago

How do find the answer for the percent of a number

1 answer:

katrin2010 [14]3 years ago

8 0

I don't really understand what you're asking, but say you have the number 67,to find 23% of that number, you would multiply 67 by .23, you will then get whatever 23% of 67 is.

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If the gradient of a line joining the points (-2, 6) and (5, b) is 14.<br> Find the value of b.

babunello [35]

Answer:

b = 104

Step-by-step explanation:

Slope is expressed as;

m = y2-y1/x2-x1

14 = b - 6/5-(-2)

14 = b - 6/5+2

14 = b-6/7

Cross multiply

b-6 = 14 * 7

b - 6 = 98

b = 98 + 6

b = 104

3 0

3 years ago

write an equation in slope-intercept form of the line that passes through the points (1,2) and (-2,-1)

Marizza181 [45]

Answer:

y=3/4x+5/4

Step-by-step explanation:

equation to use: y1-y2/x2-x1 so you get -3/-4 so your slope is 3/4 and you plug that into one of your point equations im going to use the first one so 2=3/4(1) +b so you are going to get 5/4 for b so your equation is y=3/4x + 5/4

Let me know if this helped!

6 0

3 years ago

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Math worksheets due today and im freaking out.

Shtirlitz [24]

Answer:

it's liniear

Step-by-step explanation:

since it is going up by the same amount every time

6 0

3 years ago

How far from the base of the house do you need to place a 15’ ladder so that it exactly reaches the top of a 12’ wall?

FromTheMoon [43]

Answer:

3' away

Step-by-step explanation:

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3 years ago

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2x + 3y = 7 3x + 2y = 8

Kipish [7]

Answer:

$\boxed{\sf \ \ \ x=2, \ \ y =1 \ \ \ }$

Step-by-step explanation:

Hello,

Pls post the full question next time so that we can make sure what is expected.

I assume that you want to solve for (x,y)

(1) 2x + 3y = 7

(2) 3x + 2y = 8

2*(2)-3*(1) gives

2*3x + 2*2y - 3*2x - 3*3y = 2*8 - 3*7 = 16 - 21 = -5

6x - 6x + 4y -9y = -5

-5y=-5

y = 1

and we can replace in (1)

2x + 3*1 = 7

2x = 7 - 3 = 4

x = 2

hope this helps

7 0

3 years ago