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BARSIC [14]
3 years ago
14

What does the line 5x+2y=8 look like?

Mathematics
1 answer:
cestrela7 [59]3 years ago
5 0
The correct answer would be D. The plot of the line 5x+2y = 8 is slanted right downwards. To predict, we write the equation into slope-intercept form as follows:

y = mx + b        where m is the slope and b is the y-intercept form

5x + 2y = 8
y = -5x/2 + 4

As we can see, the slope is negative so the graph should slope to the right downwards.
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3 years ago a father was 3 times as old as his son, in five years time he will be twice as old as his son, what will be the sum
ivolga24 [154]

Answer: 46 years

Step-by-step explanation:

Let the father's age be x and the son's age be y, then 3 years ago:

Father = x - 3

son     = y - 3

Then , from the first statement :

x - 3 = 3 ( y - 3 )

x - 3 = 3y - 9

x     = 3y - 9 + 3

x     = 3y - 6 .......................................... equation 1

In five years time

father = x + 5

son = y + 5

Then , from the second statement

x + 5 = 2 ( y + 5 )

x + 5 = 2y + 10

x       = 2y + 10 - 5

x       = 2y + 5 ........................ equation 2

Equating equation 1 and 2 , we have

3y -6 = 2y + 5

add 6 to both sides

3y = 2y + 5 + 6

subtract 2y from both sides

3y - 2y = 11

y = 11

substitute y = 11 into equation 1 to find the value of x

x = 3y - 6

x = 3(11) - 6

x = 33 - 6

x = 27

This means that the father is presently 27 years and the son is presently 11 years.

In four years time

father = 27 + 4 = 31

son = 11 + 4      = 15

sum of their ages in four years time will be

31 + 15 = 46 years

5 0
3 years ago
Read 2 more answers
I need help understanding this
telo118 [61]
Well, the slope for each side is simple.

All you have to do to remember slope is rise over run.

So for example:
 For Vertices E and F the Slope would be 3/9
For Vertices  G to H the slope would be 3/9
For vertices G to F the slope would be 6/2
For vertices H to E the slope would be 6/2

 
What do you notice about slopes on opposite sides?
Answer:
( H to E,and G to F) Have the same slope
 (And G to H and E to F.) Have the same slope.


What do you notice about slopes of adjacent lines? 
adjacent means adjoining or next to. So can you figure this question out? Using the information above?
5 0
3 years ago
Read 2 more answers
30,45,x,100; the mean is 60
Andrei [34K]

if there are 4 numbers that average to 60, when mutiplied they must come up to: 60*4= 240

100+30+45= 175

240-175= 65

PROOF:

100+30+45+65= 240

240÷ 4

= 60

6 0
3 years ago
Read 2 more answers
The answer needs to be in y=mx+b or y=mx-b
galina1969 [7]
Y = -10/3x + 13

All you need to do is get the slope of the line and then find the opposite reciprocal. Then plug in the point into your equation that just has the slope in it. After that find b and write out your equation.
7 0
3 years ago
3. My candy jar has 64 pieces
sammy [17]

Answer: Do you have any options? and is one of the options 8 ?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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