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dmitriy555 [2]
3 years ago
5

F(x) = x^2 - 3x + 18

Mathematics
2 answers:
Marat540 [252]3 years ago
3 0

Answer: discriminant of f is -63

Step-by-step explanation:

olya-2409 [2.1K]3 years ago
3 0

Answer:

-63

and there are no distinct real numbers

Step-by-step explanation:

-63

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3. Sam and Tim each have savings accounts. Every month they each put in some of their
Setler [38]

Answer:

y = 30x +50 --- Sam

y = 20x +80 --- Tim

Step-by-step explanation:

Given

Sam                         Tim

х  --- f(x) ---------------  g(x)

1  --- 80   --------------- 100

2  --- 110  --------------- 120

3  --- 140 --------------- 140

4 --- 170 -------------- 160

Required

Determine the y value

y value implies the equation of the table

Calculating the equation of Sam

First, we need to take any corresponding values of x and y

(x_1,y_1) = (1,80)

(x_2,y_2) = (4,170)

Next, we calculate the slope (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{170 - 80}{4 - 1}

m = \frac{90}{3}

m = 30

Next, we calculate the line equation using:

y - y_1=m(x-x_1)

y - 80 = 30(x - 1)

y - 80 = 30x - 30

Make y the subject

y = 30x - 30 + 80

y = 30x +50

Calculating the equation of Tim

First, we need to take any corresponding values of x and y

(x_1,y_1) = (1,100)

(x_2,y_2) = (4,160)

Next, we calculate the slope (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{160 - 100}{4 - 1}

m = \frac{60}{3}

m = 20

Next, we calculate the line equation using:

y - y_1=m(x-x_1)

y - 100 = 20(x - 1)

y - 100 = 20x - 20

Make y the subject

y = 20x - 20+100

y = 20x +80

7 0
3 years ago
3raise power minus 4​
balandron [24]

Answer:

1/81

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
When two identical ions are separated by a distance of 4.2×10−10 , the electrostatic force each exerts on the other is 5.2×10−9
Effectus [21]
F = kq2 / r2 
q = ne 
 F = k(ne)2 / r2 
 n = âš(r2F / ke2) = (r/e) âš(F/k) 
 k = 9 x 109 Nm2/C2 
 e = 1.6 x 10-19 C 
 n = [(4.2 x 10-10) / (1.6 x 10-19)] âš[(5.2 x 10-9) / (9 x 109)] ≅ 1.995 ≅ 2
7 0
3 years ago
How I do circumference and area
Artist 52 [7]
You multiply 3.14 by the diameter or 2 times the radius 
for area you do pi or 3.14*radius squared 
3 0
3 years ago
Susanna has played the piano for s years. Patrick has played the piano for 4 more than twice the number of years that Susanna ha
scoray [572]
S=Years Susanna has played the piano 
p=Years Patrick has played the piano 

The expression for this question would be s(2)+4=p

Hope this helps! :) 
6 0
3 years ago
Read 2 more answers
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