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Harman [31]
3 years ago
11

The value of the expression a³-2a²+3a+5 for a = -1

Mathematics
2 answers:
Liono4ka [1.6K]3 years ago
8 0

Answer:

=(-1)³-2(-1)²+3(-1)+5

=-1-2(1)+3(-1)+5

=-1-2+3+5

=-3+8

=5

mrs_skeptik [129]3 years ago
4 0

Answer:

- 1

Step-by-step explanation:

Substitute a = - 1 into the expression, that is

(- 1)³ - 2(- 1)² + 3(- 1) + 5

= - 1 - 2(1) - 3 + 5

= - 1 - 2 - 3 + 5

= - 6 + 5

= - 1

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A two-variable inequality is shown in the graph.
sammy [17]

The point which is not included in the solution set for the inequality of the two-variable inequality shown in the graph is (-1,3).

<h3>How to graph the inequality?</h3>

Inequality of a graph is represented with the greater then(<), less then(>) or with the other inequity signs. The inequality line on the graph is represented with the dotted lines.

A two-variable inequality is shown in the graph. It is a parabola.  The vertex form of parabola is the equation form of quadratic equation which is used to find the coordinate of vertex points at which the parabola crosses its symmetry.

The standard equation of the vertex form of parabola is given as,

y=a(x-h)^2+k

Here, (h, k) is the vertex point. In the graph, vertex points are (1,2). Thus, the equation become,

y=a(x-1)^2+2\\

By the point of graph (0,3), find the value of a,

3=a(0-1)^2+2\\3=a+2\\a=3-2\\a=1

Thus, the equation become,

y=1(x-1)^2+2\\y=x^2-2x+1+2\\y=x^2-2x+3\\

The graph of this line is attached below. In this graph only point (-1,3), does not fall hence, does not satisfy the equation.

Thus, the point which is not included in the solution set for the inequality of the two-variable inequality shown in the graph is (-1,3).

Learn more about the graph of the inequality here;

brainly.com/question/62792

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5 0
2 years ago
Simplify 3-7 x 5 + 2 x 4
djverab [1.8K]
The answer to the question is -24.
5 0
3 years ago
Solve the inequality 2c/3+1&gt;7
beks73 [17]

Answer:

c > 9

Step-by-step explanation:

(2c/3) + 1 > 7     subtract 1 from both sides

2c/3 > 7 -1

2c/3 > 6  (multiply both sides by 3)

2c > 6(3)

2c>18    (divide both sides by 2)

c > 18 / 2

c > 9

6 0
3 years ago
28 lb. 6 oz. − 11 lb. 5 oz. =
S_A_V [24]
17.0625 thats the answer
7 0
3 years ago
Read 2 more answers
The Keller family's dinner bill is $55.35. This includes an 8% meal tax and a 15% tip on original meal for the server. What was
Step2247 [10]
1. Convert the percents to decimals (you can do this by dividing each # by 100);
8/100= .08
15/100= .15

2. First take off the 8%;
$55.35 * .08 = $4.43

3. Take off the 15% (still use the original bill amount);
$55.35 * .15 = $8.30

4. Add the $ together after find the rate for each percent.;
$4.43 + 8.30 = $12.73

5. Subtract the add rates from the bill;
$55.35 - $ 12.73 = $42.62(answer)

7 0
4 years ago
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