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4 years ago

Write the equation to a line that goes through (3,15) and (7,21)

1 answer:

8 0

Y=mx + c

first find 'm'

m=y2-y1/x2-x1

m= 21-15/7-3

m=6/4 or 3/2

then substitute values in from either points

y=mx+c
15=3/2 * 3 + c
15=9/2 + c
15-9/2=c
11/5=c
therefore the equation must be y=3/2 x 11.5
note: you substitute with either (3,15) or (7,21) you will get the same answer either way.

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Solve: x^2 - 7x = -13

Reika [66]

There are a various of ways solve this expression. We can choose to do completing the square method or to use the quadratic formula. In this case, I will choose to do completing the square. We do as follows:

<span>x^2 - 7x = -13
</span><span>x^2 - 7x + 49/2= -13 + 49/2
(x - 7/2)^2= 23/2
</span>√[(x - 7/2)^2]= √(23/2)
x-7/2 = √46 / 2
x = √46 / 2 + 7/2

Hope this answers the question. Have a nice day.

3 0

4 years ago

I need help on sketching the graph

frozen [14]

So the first thing to do is get two points. Lets start easy lets plug in 0 for x
$y = 2(0) + 1 \\ y = 1$
We get the point (0, 1).
Now plug in 2 for x
$y = 2(2)+ 1 \\ y = 5$
So the two points are (0, 1) and (2, 5)
Now from those two points draw a straight line

8 0

3 years ago

Find the unit rate of 3÷12

yKpoI14uk [10]

Answer:

1/4

Step-by-step explanation:

3/12

Simplify. Both numbers can be divided by 3.

3/12 = 1/4

8 0

3 years ago

Read 2 more answers

It is given that R=2q-5 and Q=3p+2. Find the numerical value of R when p=3

saveliy_v [14]

Answer:

R = 17

Step-by-step explanation:

R = 2q - 5

Q = 3p + 2

Find the numerical value of R when p = 3

R = 2q - 5

R = 2(3p + 2) - 5

R = 6p + 4 - 5

R = 6p - 1

When p = 3

R = 6(3) - 1

R = 18 - 1

R = 17

4 0

3 years ago

The rugby club had 30 members last year. This year the rugby club has 36 members. By what percentage did the numbers of members

Shkiper50 [21]

30/6=5
1/5 of 100=20%
it increased by 20%

3 0

4 years ago