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vivado [14]
4 years ago
11

Can sometime tell me why the discriminate b^2-4ac doesn't identify trinomial 3x^2+4x-15 as something that's factorable with two

answers? I keep getting a negative number using the discriminate.
Mathematics
1 answer:
Romashka [77]4 years ago
6 0

Answer: Discriminant = 196

<u>Step-by-step explanation:</u>

y = 3x² + 4x - 15

   a=3    b=4   c=-15

Discriminant = b² - 4ac

                     =(4)² - 4(3)(-15)

                     = 16 - (-180)

                     = 16 + 180

                     = 196

If b² - 4ac > 0, then there are 2 real roots/solutions/x-intercepts

If b² - 4ac = 0, then there is 1 real root/solution/x-intercept

If b² - 4ac < 0, then there are 0 real roots/solutions/x-intercepts

                                                (2 imaginary roots/solutions)

Since 196 is positive, there are 2 real roots ....

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Answer:

3003 cm³

Step-by-step explanation:

21cm × 13cm × 11 cm = 3003 cm³

6 0
3 years ago
A truck rental store charges $50 plus 14 each hour use an algebraic expression to find the cost of the truck rental for 5 hours
Liula [17]

f(x)=14x+50

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4 0
3 years ago
Please help me (geometry)
vesna_86 [32]

Answer:

True

Step-by-step explanation:

When two lines are parallel, the corresponding angles formed by the transversal (intersecting line) are congruent. This is called the corresponding angles postulate. It can be used in reverse: if two corresponding angles are congruent, then the non-transversal lines are parallel.

4 0
3 years ago
Read 2 more answers
The rate of inflation is 3% . The cost of an item in future years can be found by iterating the function c(x) = 1.03x. Find the
Doss [256]
This is the concept of business mathematics, given an inflation rate of 3%, that has modeled the price of items using the function c(x)=1.03x, the cost of the refrigerator in 3 years will be as follows;
cost after 1 year:
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=1545
cost after 2 years
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7 0
3 years ago
8.
Sati [7]

Answer:

50

Step-by-step explanation:

The translation of the question is as shown;

First note that the original number is 35

The sum of 35 and one-fifth part of itself .

= 35 + 1/5(35)

= 35+7

= 42 ... A

sum of one-seventh part of itself and 3 will be;

= 1/7(35) + 3

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Adding A and B together wiill give us the final result

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The sum of 35 and one-fifth part of itself added to the sum of one-seventh

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