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juin [17]
3 years ago
9

if the coordinates of point a are (-3, 2) and the coordinates of point b are (7, 6), the x-intercept of

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
8 0
Find the equation of the line

slope=(y2-y1)/(x2-x1)
slope=(6-2)/(7-(-3))=4/10=2/5

slope is 2/5
y=mx+b
y=2/5x+b find b
input a point
6=2/5(7)+b
6=14/5+b
minus 14/5 from both sides
3 and 1/5=b
16/5=b
xintercept is when y=0
0=2/5x+16/5
minus 16/5 from both sides
-16/5=2/5x
times both sides by 5/2 to clear fraction
-8=x

xintercept is -8 or (-8,0)
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Please help!! i also need to show work. <br><br><br> write in vertex form y = -3x^2 - 18x + 12
LuckyWell [14K]

Answer:

3(-x^2-6x+4)

Step-by-step explanation:

-3x^2 - 18x + 12

-3x^2 - (2 x 3^2) x + 2^2 x 3

3 (-3x^2 over 3 - 2x3^2 times x over 3 + 262 x 3 over 3)

3(-(x^2) - (2 x 3^2-1 times x) +2^2

3(-x^2 - (2 times 3x) +4)

3(-x^2-(6x) + 4)

3(-x^2 - 6x + 4)

     

5 0
3 years ago
What is the answer Timothy curtain company is making curtains for a local hotel he wants each certain to be 48 inches long at th
Travka [436]

Answer:

180 feet

Step-by-step explanation:

The length of each curtain = 48 inches. Let the length of the curtain in feet be represented by x.

But,

1 inch = 12 feet

So that,

48 inches = x feet

⇒ x = \frac{48}{12}

      = 4

Thus,

48 inches = 4 feet

The number of feet of fabric needed for 45 curtains can be determined as:

45 x 4 feet = 180 feet

Therefore, 180 feet of fabric would be needed to make 45 curtains.

7 0
3 years ago
marisa is 5 times her daughter's age plus 4 years. if her daughter's age is represented as d, which expression represents marisa
Mars2501 [29]

Answer:

5d+4

Explanation:

d= her daughters age

5 0
3 years ago
What is the first term of the geometric sequence presented in the table below?
Rina8888 [55]
176 = a1 * r^4
704 = a1 * r^6

dividing:-

r^2 = 706/174 =  4   so r = +/- 2

a1 =  176 / 2^4 =  176/16 = 11

So 11 is the first term 
8 0
3 years ago
How can you use the definition of a circle and the distance formula to derive the standard equation of a circle?
-BARSIC- [3]
No you cant but do you know the formula of the circle
3 0
3 years ago
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