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kicyunya [14]
3 years ago
12

How you you work out this question?

Mathematics
2 answers:
r-ruslan [8.4K]3 years ago
5 0

Answer:

k < 0 or k > 4

Step-by-step explanation:

kx² + kx + 1 = 0

Two solutions:

b²-4ac > 0

(k)²-4(k)(1) > 0

k² - 4k > 0

k(k-4) > 0

k < 0 or k > 4

krok68 [10]3 years ago
3 0

Answer:

k<0 or k>4

Step-by-step explanation:

In the generic equation ax² + bx + c = 0, there are two solutions only if discriminant D>0 where D = b²-4ac.

Mapping your equation on the generic means that:

a = k

b = k

c = 1

So when we have to solve D>0 we solve:

k² - 4k > 0

k(k-4) > 0

roots are k=0 and k=4

k² - 4k > 0 when k<0 or k>4

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A student took out a simple interest loan for 2400 for 2 years at a rate of 7%. What is the interest on the loan?
Stels [109]

Answer:

using the 7% interest rate the interest rate is 168 due to the fact if you take 2400 x .07 you get 168 however I don't know if it asks that but in order to see exactly how much money would be in there you would have to add the 168 to the 2400 if you are to add that to the 2400 that was originally put in the bank you would come up to 2568

5 0
3 years ago
Evaluate 10(a + b) -6c for a = 12,b = 5, and c = 9.
Gelneren [198K]

Answer:

10(a + b) -6c = 116

Step-by-step explanation:

Evaluate 10(a + b) -6c for a = 12,b = 5, and c = 9.

10(a + b) -6c = 10(12 + 5)  - 6*9

10(a + b) -6c = 10*(17) - 54

10(a + b) -6c = 170 - 54

10(a + b) -6c = 116

3 0
3 years ago
Pls help me so I can pass
Sholpan [36]

Answer:

A

Step-by-step explanation:

V = (0.04)*H (Company P)

V = (0.06)*H (Company S)

V represents the vacation hours and H is the hours worked

If they both work 2080 hours

V1 = (0.04)*(2080) = 83.2 vacation hours (Company P)

V2 = (0.06)*(2080) = 124.8 vacation hours (Company S)

124.8 - 83.2 = 41.6 hrs

6 0
3 years ago
Read 2 more answers
Evaluate an expressions: 4a + 3b + c if a = 8, b=-2 and c = 4
zaharov [31]

Answer:

4 x 8= 32

3 x 2= 6

32 + 6 + 4= 42

Therefore your answer would be 42.

Step-by-step explanation:

Hope this is helpful :)

8 0
3 years ago
Given the function f(x) = 5x, Section A is from x = 0 to x = 1 and Section B is from x = 2 to x = 3.
Debora [2.8K]
f(x)=5x\\\frac{f(1)-f(0)}{1-0}\\\frac{5-0}{1}\\5\\\\\frac{f(3)-f(2)}{3-2}\\\frac{15-10}{1}\\5

A: 5; 5

B: 1; they are the same
3 0
3 years ago
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